Tools for developers — Data stays with you

64 match your filters — 61 of them answered our check today.

Watching this group for 19 days · how we check

This week20 new arrivals2 stopped answering

Narrow it down

Doesn't mention AI51Free33No sign-up27Works offline19Open source7Data stays with youNo subscription2

JavaScript Tools

Live

Free browser-based suite of developer utilities (JSON/HTML validation, Base64, JWT inspection, password generation) that avoids uploading data.

FreeNo sign-upData stays with you
What to know▼
How it works
Most processing happens client-side so code, tokens, and credentials aren't sent to a server
Pricing
free, no account
Best for
Developers needing quick formatting/encoding utilities without exposing sensitive data

Watched for 3 days · last checked 3d ago

Details →

Squeezes Bulk Image & File Compressor

Live

A free, browser-based bulk image compressor and format converter that processes files entirely on your device without uploading them to any server.

FreeNothing to installWorks offlineData stays with you
What to know▼
How it works
compresses and converts images client-side in the browser with no server upload, using lossless optimization
Pricing
completely free
Best for
developers, designers, and creators who need to shrink or convert large batches of images without giving up file privacy

Watched for 6 days · last checked today

Details →

LingoCord

Live

An open-source Discord extension that translates messages using your own translation API key, built privacy-first and developer-friendly. Really for technically comfortable users willing to set up their own API key.

Data stays with youOpen source
What to know▼
How it works
A Discord extension that translates messages using your own translation API key.
What's different
Open source and privacy-first — translation runs through your own API key rather than a shared third-party service.
Best for
Technically comfortable Discord users willing to set up their own translation API key.
Watch out
Requires bringing and configuring your own API key to work.

Watched for 13 days · last checked 1d ago

Details →

LocalMode

Live

An open-source toolkit for building AI features — chat, RAG, speech, vision — that runs entirely in the browser with no servers and no data leaving the device. Built for developers.

Domain registered 7 months ago

Data stays with youOpen source
What to know▼
How it works
An open-source toolkit for running AI entirely in the browser: LLM chat across 76 models, RAG and vector search, Whisper and Kokoro speech, and vision, with no server or API key required. Runs on WebGPU with a WebAssembly fallback.
What's different
Data never leaves the device, and it ships a zero-dependency core plus a shadcn UI registry of 107 components and 36 installable blocks for building on top of it.
Pricing
Open source (MIT license).
Best for
Developers building browser-based AI features without standing up servers or managing API keys.

Watched for 11 days · last checked today

Details →

PeerReview

Live

A swap network where indie makers trade honest reviews on each other's live store listings, for developers who need real reviews on Chrome Web Store or Product Hunt.

FreeData stays with you
What to know▼
How it works
List your product, review one from the pool, get one back
What's different
reviews verified by a real person, not bots
Pricing
free
Best for
indie developers needing store credibility

Watched for 5 days · last checked today

Details →

AI Usage Tracker

Live

Local-first dashboard that auto-discovers your Claude and Codex spend across 10+ developer tools, with charts and zero telemetry.

Domain registered 2 months ago

Works offlineData stays with youNo tracking
What to know▼
How it works
auto-discovers usage across 10+ dev tools locally
What's different
zero telemetry, data stays on your machine
Best for
developers tracking AI tool spend

Watched for 5 days · last checked today

Details →

FreeCustom.Email

Live

Instant, no-signup temporary email aliases with rotating domains to dodge blacklists, plus a public API for developers who want to build it into their own workflows.

FreeNo sign-upData stays with youOpen source
What to know▼
How it works
Creates custom, instant temporary email aliases (any inbox name) without sign-up, receiving emails in real-time from multiple rotating domains to avoid blacklists; also offers a public API and open-source frontend.
What's different
Rotating domains to avoid blacklists, plus no popups, timers, or tracking, unlike traditional temp mail tools.
Pricing
Free.
Best for
People needing disposable email for sign-up verifications or testing, and developers who want to build disposable email into their own workflows via the API.

Watched for 13 days · last checked 7d ago

Details →

Atlas

Live

Gives developers and AI coding assistants deterministic, cited answers about a codebase's symbols, callers, and dependencies without sending code off-device.

Works offlineData stays with you
What to know▼
How it works
Runs locally as a single binary with SQLite, CLI, MCP and HTTP interfaces to index a codebase
What's different
Deterministic, reproducible results with exact file-and-line citations; claims 36x fewer tokens than a graph baseline
Watch out
Code never leaves the machine

Watched for 3 days · last checked 2d ago

Details →

RaaDoc

Live

Free toolkit of 55+ PDF, image and developer utilities that process files locally in the browser without uploading them.

Domain registered 9 days ago

FreeNo sign-upData stays with you
What to know▼
How it works
52 of 56 tools run entirely client-side, no server upload
Pricing
free, no signup, no daily limits

Watched for 5 days · last checked today

Details →

Testnizer — The offline API client

Live

Offline desktop API testing client (REST, GraphQL, gRPC) that keeps all your requests and tokens on your machine instead of a vendor cloud.

FreeWorks offlineData stays with youOpen source
What to know▼
How it works
runs 100% offline, stores collections in local SQLite and tokens in the OS keychain
Pricing
free, open source (MIT)
Best for
developers who don't want API collections synced to a third-party cloud

Watched for 5 days · last checked today

Details →

ToolVines

Live

Collection of 340+ free online tools (PDF, image, financial, developer) that process everything client-side in the browser with no upload.

Domain registered 1 month ago

FreeNo sign-upData stays with you
What to know▼
How it works
Uses WebAssembly and Canvas APIs to run tools entirely in-browser.
What's different
No file caps, no watermarks, no server upload.
Pricing
Free

Watched for 4 days · last checked today

Details →

DevOpsForge

Live

A free, client-side visual builder for Docker Compose, Nginx/Caddy configs, healthchecks and backup scripts that generates production files without uploading anything to a server; a developer/DevOps tool.

FreeData stays with you
What to know▼
How it works
A visual configurator that generates Docker Compose, Nginx/Caddy configs, healthchecks and cloud backup scripts, producing production-ready environments in about 60 seconds.
What's different
100% client-side — zero server-side uploads.
Pricing
Free.
Best for
Developers and DevOps engineers who want production configs without hand-writing them.

Watched for 10 days · last checked 4d ago

Details →

Float text copy paste texts in floating

Live

A floating clipboard that lets you copy and paste text line-by-line without switching apps, handy for reading OTPs, copying data entries or working through long text files.

FreeWorks offlineData stays with you
What to know▼
How it works
A draggable, resizable floating window that sits over any app for copying, viewing and managing text line-by-line from the clipboard, with one-tap copy and auto-advance.
What's different
Works as an overlay across any app rather than requiring you to switch windows to copy or view data.
Pricing
Free.
Best for
Students, developers, content writers and support teams who repeatedly copy data like OTPs or entries without switching apps.

Watched for 13 days · last checked 8d ago

Details →

Re-QR Invoice Validator- KSA

Live

An offline tool for validating Saudi e-invoice QR codes, UBL XML files, and PDF/A-3 invoices, with VAT calculation, on-device.

Works offlineData stays with you
What to know▼
How it works
Validates invoice QR codes, UBL 2.1 XML files, and PDF/A-3 e-invoices, scanning QR codes, inspecting invoice data, and calculating VAT directly on-device with no cloud uploads.
Best for
Businesses, accountants, auditors, and developers handling Saudi e-invoices.
Watch out
Independent application, not affiliated with or endorsed by ZATCA or any government authority.

Watched for 7 days · last checked 5d ago

Details →

Markdown to Email

Live

Converts Markdown into inlined, Outlook-safe HTML you can paste into ConvertKit, beehiiv, or Mailchimp, entirely in your browser — built for newsletter writers and marketers who draft in Markdown.

FreeNo sign-upData stays with you
What to know▼
How it works
Converts Markdown into fully inlined, Outlook-safe HTML entirely in the browser, ready to paste into ConvertKit, beehiiv, Mailchimp or other email service providers, with built-in email-safe callout boxes and CTA button syntax.
What's different
Runs 100% client-side with no signup, account or paywall, so content never leaves the browser.
Pricing
Free, no signup, no paywall.
Best for
Newsletter writers, marketers and indie developers who draft in Markdown and need Outlook-safe HTML for their email platform.

Watched for 9 days · last checked 3d ago

Details →

MemPlato

Live

Turns your Android phone into a self-hosted MCP server so AI assistants like Claude, Cursor or Perplexity can pull your personal memory without sending data to the cloud. Aimed at developers already using MCP-compatible tools.

Works offlineData stays with youOpen sourceNo subscription
What to know▼
How it works
Turns an Android phone into a self-hosted MCP (Model Context Protocol) server by installing a Python MCP server inside Termux, with a secure tunnel giving the phone a stable public HTTPS URL that AI clients like Claude, Cursor or Perplexity can connect to for persistent memory.
What's different
Data is stored locally on the user's own phone instead of a vendor's cloud, with no subscription or vendor lock-in.
Pricing
No subscription.
Best for
Developers already using MCP-compatible AI tools who want to own their memory data instead of storing it in the cloud.
Watch out
Relies on a relay tunnel (relay.memplato.com) and requires Termux running on the phone, with a watchdog to restart the server if the phone reboots or Termux closes.

Watched for 9 days · last checked 3d ago

Details →

YAML2JSON

Live

Converts YAML to JSON and back entirely in your browser, including multi-document Kubernetes manifests, with line-numbered parse errors, your config never leaves the browser.

Domain registered 21 days ago

FreeNo sign-upWorks offlineData stays with you
What to know▼
How it works
Converts YAML to JSON and back entirely in the browser, including multi-document files like Kubernetes manifests, with line-numbered parse errors.
What's different
Runs offline once loaded and your config never leaves the browser; the conversion core is open source.
Pricing
Free, no signup.
Best for
Developers who need to convert Kubernetes manifests or other YAML/JSON files without uploading them anywhere.

Watched for 13 days · last checked 7d ago

Details →

FreeToolDev

Live

A free, browser-based batch toolkit for developers and designers — resize/convert files, decode JWTs, and more, entirely client-side with nothing uploaded to a server.

Domain registered 26 days ago

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
A browser-based batch toolkit that processes dozens of files at once — resizing/converting/compressing images (PNG, JPG, WebP), converting CSV to JSON, decoding JWTs, and more — entirely client-side.
What's different
Most single-file tools handle one file at a time; this is built to batch-process dozens at once, with nothing uploaded to a server.
Pricing
Free.
Best for
Developers and designers who need to process many files at once without installing software or uploading data.

Watched for 13 days · last checked 2d ago

Details →

.MDPPT

Live

Converts Markdown files straight into PowerPoint slides, skipping manual copy-paste and reformatting — useful for developers writing specs, teachers prepping lecture notes, or anyone building decks.

Data stays with youCan export my data
What to know▼
How it works
Converts Markdown files into PowerPoint presentations, automatically splitting slides by headings (#, ##, ###) and preserving bullet points, numbered lists, and code blocks with syntax highlighting.
What's different
Processing is fully client-side, so your content never leaves your browser; exports as .pptx or .pdf.
Best for
Developers, technical writers, educators and anyone who prefers writing in Markdown but needs to present in PowerPoint.

Watched for 17 days · last checked 1d ago

Details →

HAR File Viewer

Live

A free HAR file viewer that runs entirely client-side (nothing uploaded) and lets you inspect requests, headers and timing waterfalls — a real developer debugging tool.

FreeData stays with you
What to know▼
How it works
Opens HAR exports from Chrome, Firefox, Safari, or Edge and lets you inspect requests, headers, cookies, request/response bodies, query params, and a timing waterfall, with filtering by status, method, type, or URL and redaction of sensitive headers.
What's different
Runs 100% client-side, so no captured network data leaves your browser.
Pricing
Free.
Best for
Developers debugging network requests and performance.

Watched for 13 days · last checked 2d ago

Details →

SequenceFast - Scroll Sequence Generator

Live

Converts an MP4 into a scroll-triggered image sequence and a ready-to-use React component, processed locally in your browser — a developer tool.

Data stays with you
What to know▼
How it works
Drop an MP4 into the browser and it uses WebAssembly to process the video locally, then outputs an optimized image sequence and a ready-to-use React component for a scroll-triggered animation.
What's different
Processes video entirely in the browser rather than uploading it to a server.
Best for
Developers adding scroll-sequence animations to a React project.

Watched for 12 days · last checked 6d ago

Details →

HandyTools

Live

15 free browser-based developer tools, JSON formatter, regex tester, encoders, generators, styled with a nostalgic Windows 95 look. Runs in the browser, not installed, nothing uploaded to a server.

Domain registered 9 months ago

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
15 free developer and productivity tools — JSON formatter, regex tester, base64/URL encoders, UUID and password generators, unit and color converters — running entirely in the browser with a Windows 95-styled interface.
What's different
Nothing is uploaded to a server; everything runs client-side with no signup, ads or tracking.
Pricing
Free.
Best for
Developers who want quick browser-based utility tools without installing anything.

Watched for 12 days · last checked 6d ago

Details →

Toolsz

Live

A free collection of 219 client-side browser tools for PDF, image, and developer tasks, with no uploads, watermarks, or sign-up.

FreeNo sign-upData stays with you
What to know▼
How it works
Runs entirely client-side to compress, merge, convert, sign, and edit files.
Pricing
Free.
Best for
People who need quick PDF, image, or dev utility tasks done privately in the browser.

Watched for 11 days · last checked 5d ago

Details →

iply.dev

Live

A privacy-first IP lookup and network diagnostics toolkit (DNS, WHOIS, WebRTC leak checks) with no account and no tracking, aimed at technical users rather than general consumers.

Domain registered 12 months ago

No sign-upData stays with you
What to know▼
How it works
Shows your public IPv4/IPv6 address, approximate location, ISP and ASN, and runs DNS, WHOIS/RDAP, reverse DNS and WebRTC leak checks.
What's different
No account, no marketing trackers, and no persistent raw IP storage in app-controlled systems.
Best for
Technical users who want network diagnostics without creating an account or being tracked.

Watched for 12 days · last checked 6d ago

Details →

Online Tool Yard

Live

A collection of client-side utility tools — encoding/decoding, text formatting, JSON conversion, hashing, color tools, network lookups — that run entirely in your browser with nothing sent to a server. For developers and designers who want quick one-off utilities.

Data stays with you
What to know▼
How it works
A collection of client-side utility tools covering encoding/decoding, text formatting, JSON and data conversion, hashing, color design, and network lookups, all running in the browser.
What's different
Fully client-side — no data is sent to a server.
Best for
Developers and designers who need quick one-off utility tools without uploading anything.

Watched for 12 days · last checked 6d ago

Details →

MyToolsHub

Live

A free hub of 100+ browser-based tools spanning PDFs, images, SEO and developer utilities, no sign-up or downloads required. A general toolkit with a dedicated developer section, not built for one profession.

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
A browser-based hub of 100+ tools for PDFs, images, text, developer utilities, SEO, calculators and generators, with no downloads or sign-up.
What's different
Runs entirely in the browser with no account or install, covering many task categories in one place.
Pricing
Free.
Best for
Students, developers, creators and professionals who want quick access to varied everyday tools without setting up accounts.

Watched for 15 days · last checked 9d ago

Details →

The OS Suite

Live

76 separate browser-based, offline, pay-once workspaces built for specific roles like real estate agents, fitness coaches and developers, pitched as an escape from stacked SaaS subscriptions.

Nothing to installWorks offlineData stays with youPay once
What to know▼
How it works
76 self-contained, browser-based workspaces, each with 8-10 purpose-built modules for a specific role or niche (real estate, fitness coaching, cybersecurity, development, etc.), running 100% offline and locally.
What's different
Data never touches a server (local-first architecture) and it's a one-time purchase instead of a stack of monthly SaaS subscriptions.
Pricing
Pay once, own forever (one-time payment, no subscription).
Best for
Professionals in specific niches who want purpose-built tools without recurring SaaS fees or sending business data to the cloud.

Watched for 13 days · last checked 7d ago

Details →

Klipzo

Live

Gives students and developers 130+ free browser-based file tools instead of uploading files to third-party servers.

FreeData stays with you

First seen today · last checked today

Details →

CodeKitHub

Live

A collection of free browser-based developer and image tools that run locally with no signup or file uploads.

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
Tools run entirely in-browser; data never leaves your device
Pricing
Free, no signup, no paywalls
Best for
Developers wanting quick utilities without creating accounts

Watched for 3 days · last checked 2d ago

Details →

CaptureNest

Live

A Chrome extension that takes full-page screenshots entirely in your browser, with no uploads or accounts.

Works offlineData stays with youNo tracking
What to know▼
How it works
Auto-stitches long pages and hides cookie banners/popups before capture
What's different
Runs 100% locally, no server or account needed
Pricing
Not stated
Best for
Developers and designers who need clean full-page captures privately

Watched for 3 days · last checked 2d ago

Details →

TrialGuard

Live

An Android app that tracks your free trials and subscriptions on-device and reminds you before you get charged, with no account or bank connection required.

No sign-upData stays with youNo tracking
What to know▼
How it works
Add trials/subscriptions manually, get reminders before charges hit
What's different
No account, no bank connection, everything stays on-device

Watched for 4 days · last checked 3d ago

Details →

SJ Creation Tool Box

Live

A free toolbox of 160+ browser-based developer and design tools (PDF editor, compressor, JSON formatter, QR generator) with no signup or upload.

FreeNo sign-upData stays with you
What to know▼
Pricing
free
Best for
Developers and designers needing quick utility tools without uploading files

Watched for 4 days · last checked 3d ago

Details →

Zellio.io

Live

A free collection of 50 client-side web utilities (code formatter, regex tester, image compressor, timestamp converter and more) that run entirely in your browser with no login required.

No sign-upData stays with you
What to know▼
How it works
A collection of 50 client-side web utilities — code formatter, regex tester, image compressor, Unix timestamp converter and more — that run entirely in the browser.
What's different
Runs 100% locally with no login required, so tools work instantly without uploading data.
Best for
Developers who want quick one-off utilities without creating an account or uploading files.

Watched for 15 days · last checked 9d ago

Details →

DevCraftKit

Live

A browser-based collection of developer, DevOps, and text utilities that run locally with no account or data upload.

No sign-upData stays with youNo tracking
What to know▼
How it works
Runs utilities directly in-browser
What's different
no accounts, no data uploads, no tracking
Best for
developers needing quick utilities without sending data to a server

Watched for 5 days · last checked 3d ago

Details →

LocalOnly

Live

A browser-based toolkit for formatting, validating, and converting JSON and other developer file formats, entirely client-side.

Data stays with youNo tracking
What to know▼
How it works
Runs 100% in the browser with no backend.
What's different
No uploads, tracking, or server-side processing.
Best for
Developers who want quick JSON/data utilities without sending data to a server.

Watched for 5 days · last checked 4d ago

Details →

DevTab

Live

110+ browser-based dev utilities — JSON, JWT, regex and SQL formatting and more — that run entirely client-side with no signup, uploads or server calls.

FreeNo sign-upData stays with you
What to know▼
How it works
A collection of 110+ developer utilities — JSON formatter, JWT decoder, regex tester, base64, diff checker, SQL formatter and more — that run entirely in the browser.
What's different
No uploads, no server calls, and no signup, unlike tools that process input server-side.
Pricing
Free.
Best for
Developers who want quick one-off formatting or decoding tools without sending data to a server.

Watched for 16 days · last checked 10d ago

Details →

BroBroGo

Live

A free collection of 100+ browser-based tools for JSON, PDFs, and everyday dev tasks that run entirely locally with no file uploads or accounts.

Domain registered 1 month ago

FreeWorks offlineData stays with you
What to know▼
How it works
100+ tools localized into 68 languages run locally in the browser with no accounts and no file uploads.
Pricing
100% free.

Watched for 10 days · last checked 7d ago

Details →

AniqDev

Live

A free collection of 13 client-side developer utilities (JSON formatter, CSV-to-JSON converter, password generator, QR code generator) in English and Arabic that never send data to a server.

FreeNo sign-upData stays with you
What to know▼
How it works
Everything runs 100% client-side in the browser with no login required.
What's different
built bilingual English/Arabic; most dev tool sites only serve English.
Pricing
free.
Best for
developers, including Arabic speakers, who want quick utilities without accounts or uploads.

Watched for 11 days · last checked 8d ago

Details →

Utilify

Live

A privacy-first bundle of everyday utility tools for creators, developers, marketers, and students that avoids sending data to external servers, unlike most ad-supported online utility sites.

Domain registered 17 days ago

Data stays with you
What to know▼
How it works
Bundles multiple everyday utilities in one toolbox without ads, signups, or uploading data to external servers.
Best for
creators, developers, marketers, and students who want quick utilities without handing data to third-party servers.

Watched for 12 days · last checked 8d ago

Details →

Brew Finder

Live

A Chrome extension that scans pages you visit and flags matching Homebrew packages you can install. Aimed at developers who use Homebrew on macOS, positioned as privacy-first.

Data stays with you
What to know▼
How it works
A Chrome extension that scans the pages you browse and detects matching Homebrew formulae and casks as you go.
What's different
Positioned as privacy-first, with the description noting it avoids uploading data.
Best for
Developers on macOS who use Homebrew and want relevant packages surfaced while browsing.

Watched for 12 days · last checked 9d ago

Details →

SecretScout — API Key & Secret Detector

Live

A browser extension that scans pages you visit for exposed API keys and secrets (OpenAI, AWS, Stripe, GitHub, Google) entirely locally. Built for developers and security engineers guarding against credential leaks.

Works offlineData stays with you
What to know▼
How it works
A browser extension that scans pages you visit for exposed API keys and secrets from providers like OpenAI, AWS, Stripe, GitHub, and Google, checking the DOM, scripts, and network responses.
What's different
Scanning happens 100% locally — nothing leaves your browser.
Best for
Developers and security engineers who want to catch accidentally exposed credentials while browsing.

Watched for 12 days · last checked 9d ago

Details →

DevDash — Developer Tools, Fast

Live

17 client-side developer utilities, JSON formatter, JWT decoder, regex tester, hash and UUID generators and more, in one page, each also exposed as a REST API endpoint. No sign-up, nothing leaves your browser.

Domain registered 18 days ago

No sign-upData stays with you
What to know▼
How it works
A single page bundling 17 client-side developer utilities — JSON formatter, Base64 encoder/decoder, JWT decoder, regex tester, hash generator, UUID generator, URL encoder, timestamp converter, password generator, SQL formatter, cron parser, Markdown preview, color converter, diff tool, QR code generator, Lorem Ipsum generator, and an AI content detector — each also available as a REST API endpoint.
What's different
All processing happens client-side, so data never leaves the browser, and no sign-up is required.
Pricing
No sign-up required.
Best for
Developers who want quick access to common utilities without installing separate tools, including via API in scripts.

Watched for 12 days · last checked 9d ago

Details →

Free Online Color Tools for Designers

Live

Free browser-based color utilities for format conversion, palettes, gradients and color extraction, with nothing uploaded to a server. For designers and developers who want quick tools, no install.

Domain registered 5 months ago

FreeNothing to installData stays with you
What to know▼
How it works
A collection of browser-based color utilities: converting between color formats, generating palettes and gradients, extracting colors from images, and analyzing color values, all running client-side.
Pricing
Free.
Best for
Designers and developers who want quick color conversions or palette generation without installing software or uploading files to a server.

Watched for 13 days · last checked 2d ago

Details →

BugPaste

Live

A Chrome extension that bundles a screenshot or recording with console logs, network requests and environment info into one bug report, entirely on your machine. Built for developers and QA.

Domain registered 30 days ago

Works offlineData stays with youCan export my data
What to know▼
How it works
A Chrome extension that captures a screenshot or video recording along with console logs, network requests and environment info, bundling them into one paste-ready bug report; can export a video to webm or a full HTML report.
What's different
Runs 100% locally — nothing leaves your machine.
Best for
Developers and QA testers who need a complete, shareable bug report without manually collecting logs and screenshots.

Watched for 13 days · last checked 2d ago

Details →

Handiwork.tools

Live

A free set of 52 browser tools — JSON formatting, regex testing, encryption, converters, calculators — running locally so nothing uploads. Mostly developer tools, plus general productivity ones.

FreeNo sign-upNothing to installWorks offline
What to know▼
How it works
A free collection of 52 browser-based tools spanning developer utilities (JSON formatter, regex tester, JWT decoder), security tools (AES-256 encryption, PII scrubber), converters, calculators and productivity tools, all running locally in the browser.
What's different
No sign-up, no paywalls and no limits, and everything runs locally so data never leaves the device.
Pricing
Free.
Best for
Developers and general users who want quick one-off tools without installing an app.

Watched for 14 days · last checked 2d ago

Details →

JSONFORGE

Live

A browser-based JSON toolkit (format, validate, diff, convert, visualize) that runs entirely client-side with zero uploads and no servers, for developers who don't want their data leaving the browser.

Works offlineData stays with youOpen source
What to know▼
How it works
A browser-based JSON toolkit — format, validate, beautify, diff, convert, visualize, and generate code from JSON — running entirely client-side.
What's different
Zero uploads, works offline, and is installable as a PWA, with no server or API keys involved.
Best for
Developers who don't want their JSON data leaving the browser.

Watched for 14 days · last checked 2d ago

Details →

DevToolBox

Live

Browser-based developer tools that make zero network calls — your pasted data never leaves your machine, unlike most online dev-tool sites that quietly phone home.

Data stays with you
What to know▼
How it works
Runs developer tools entirely in the browser and makes zero network calls, so pasted data never leaves your machine.
What's different
Verifiable no-network-call behavior — you can check the browser's Network tab yourself, unlike sites that silently send data to servers.
Best for
Developers who want to paste sensitive data into online tools without it being transmitted anywhere.

Watched for 15 days · last checked 2d ago

Details →

OpenDevUtils

Live

Privacy-first developer utilities — JWT decode, JSON format, Base64, UUIDs, timestamps, diff, cron, regex, SQL formatting — as a web app, desktop app or Chrome extension, all running locally.

Data stays with you
What to know▼
How it works
A set of developer utilities — JWT decoding, JSON formatting, Base64 conversion, UUID generation, timestamp conversion, text diff, cron parsing, regex testing, SQL formatting — available as a web app, desktop app or Chrome extension.
What's different
All processing happens locally on your device; no data is uploaded.
Best for
Developers who want quick utility tools without sending pasted data to a server.

Watched for 15 days · last checked 2d ago

Details →

Lexicon Cipher

Live

A free collection of browser-only utilities — JSON formatter, regex tester, password generator, QR generator and more — for developers and quick technical tasks, with nothing ever uploaded to a server.

FreeData stays with you
What to know▼
How it works
A collection of browser-only tools - JSON formatter, password generator, regex tester, unit converter, QR generator and more - that run entirely client-side.
What's different
Nothing ever leaves the browser to a server.
Pricing
Free.
Best for
Developers needing quick technical utilities without uploading data.

Watched for 16 days · last checked 2d ago

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Rocket Web Tools

Live

Over 168 small utilities — converters, calculators, dev tools — running client-side in your browser with nothing uploaded, no account needed, and offline support once loaded.

FreeNo sign-upNothing to installWorks offline
What to know▼
How it works
A collection of 168+ browser-based utilities — developer tools, image converters, text analytics, calculators, network utilities and more — that run entirely client-side.
What's different
Every tool runs in your browser so your data never leaves your device, works offline once loaded, and there's no account, paywall or ads on the tools themselves.
Pricing
Free.
Best for
Developers and everyday users who want quick one-off utilities without uploading data or creating an account.

Watched for 16 days · last checked 8d ago

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Quietbench

Live

A free suite of browser-based developer tools, JSON formatter, regex tester, cron builder, a WCAG accessibility checker, that runs client-side with no signup, ads, or data sent to a server.

FreeNo sign-upData stays with youNo ads
What to know▼
How it works
A small suite of browser-based dev tools — JSON formatter, regex tester, cron builder, WCAG contrast checker, and API request tester — that run entirely client-side.
What's different
No accounts, no ads, and no data sent to a server, unlike bookmarked dev-tool sites that get slower and ad-heavier over time.
Pricing
Free.
Best for
Developers who want quick utility tools without signing up or sending data to a server.

Watched for 17 days · last checked 1d ago

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DevToolbox Pro

Live

Gives developers an all-in-one privacy-first toolkit instead of uploading data to third-party dev tools.

Data stays with you

First seen today · last checked today

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LocalJSON

Lets developers clean and reformat messy JSON entirely in the browser instead of uploading sensitive client data to a server.

Data stays with youCan export my data

First seen today

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Fliktools

Not responding

A free privacy-first browser toolkit of 87+ tools spanning PDF, image, AI writing, wellness and developer utilities, all processed locally.

FreeNo sign-upWorks offlineData stays with you
What to know▼
How it works
All tools run locally in-browser, files never uploaded
Pricing
free forever, no paid tier
Best for
Anyone wanting quick utility tools without files leaving their device

Watched for 4 days · last checked today

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ZillaSoft

Live

A pair of privacy-focused desktop utilities for text expansion and clipboard management.

Data stays with you
What to know▼
How it works
Two privacy-first desktop utilities: Snipzilla, a privacy-focused text expander, and Stashzilla, a smart clipboard manager that keeps copied items organized and searchable.
Best for
People who want fast, private tools built by one indie developer.

Watched for 8 days · last checked 5d ago

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RealTimeZones

Live

A fast, ad-free interactive timezone visualizer for coordinating across remote teams.

Domain registered 10 days ago

Data stays with youNo ads
What to know▼
How it works
An interactive timezone visualizer built for engineers and remote teams to coordinate across borders, designed to be ad-free, lightweight, and privacy-first.

Watched for 8 days · last checked 2d ago

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FreeMetaTools - Free Online Utility Tools

Live

A free bundle of 332 small web utility tools pitched as secure and privacy-first, though the listing gives no detail on what each tool does or how it handles data.

FreeNo sign-upData stays with youNo ads
What to know▼
How it works
A bundle of 332 free web utility tools, pitched as privacy-first.
Pricing
Free.

Watched for 14 days · last checked 8d ago

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CrispToolHub

Live

A hub of 170+ free browser-based tools (PDF, image, resume/ATS and more) that run client-side, so files never leave your device. A broad utility site, not a specialized tool for one profession.

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
A hub of 170+ browser-based tools across 16 categories, including a PDF toolkit (compress/merge/split), an AI resume builder with ATS scoring, and financial calculators for India (GST, PPF, EPF) and the US (401k, HSA).
What's different
Processing happens locally in the browser via WebAssembly, so files never reach a server, and there is no sign-up, daily limit, or watermark.
Pricing
Free, no account required.
Best for
Anyone needing quick PDF, resume/ATS, or financial calculations without installing software or creating an account.

Watched for 13 days · last checked 2d ago

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Pageonaut

Live

A free, no-signup collection of quick browser utilities — text, image, PDF and calculator tools plus a developer-helpers section — that mostly runs client-side so files don't leave your device.

Domain registered 9 months ago

FreeData stays with you
What to know▼
How it works
A growing collection of free, no-signup browser utilities for text, image, PDF, and developer tasks; most tools run entirely in the browser so files and text never leave the device, with any cloud processing clearly labeled.
What's different
Most processing happens client-side rather than uploading files to a server.
Pricing
Free.
Best for
People who need a quick one-off text, image, PDF, or dev task done without installing software or creating an account.

Watched for 9 days · last checked 9d ago

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TULBENCH

Live

A privacy-focused suite of developer utilities: IP tracing, file conversion, password/QR generation, and more.

FreeNo sign-upData stays with you
What to know▼
How it works
A digital utility suite covering IP tracing, file conversion, password generation, QR codes and color tools.
Pricing
Free, no sign-up.
Best for
Developers and creators wanting privacy-focused utilities.

Watched for 2 days · last checked 2d ago

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Account Switcher

Live

A Chrome extension for saving and one-click switching between multiple login sessions on the same site.

Data stays with youNo tracking
What to know▼
How it works
Saves and restores multiple login sessions for the same website, letting you switch accounts with one click, stored locally with no cloud sync.
Best for
Developers, freelancers, marketers and QA engineers managing multiple accounts on the same site.

Watched for 2 days · last checked 2d ago

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Eleganote

Live

A local-first notebook combining handwriting, rich documents and PDF markup in one workspace, for students and professionals tired of juggling multiple note apps.

Works offlineData stays with youNo adsNo tracking
What to know▼
How it works
A local-first notebook combining handwriting (ink, pens, highlighters, shapes, lasso selection), rich text boxes, tables, images, audio memos, and PDF import with searchable text, all on a multi-page canvas organized with folders and tags.
What's different
Combines handwriting, structured documents and PDF markup in one workspace instead of forcing a choice between separate apps, without ads or tracking SDKs.
Best for
Students, professionals and creators who currently juggle multiple note apps and want handwriting, documents and PDF annotation in one place.

Watched for 17 days · last checked 1d ago

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Ic2Share

Live

Suite of client-side browser tools, including a teleprompter and EXIF stripper, that run entirely offline.

Domain registered 2 months ago

Works offlineData stays with you
What to know▼
How it works
A suite of web utilities (e.g. an auto-scrolling teleprompter, an EXIF metadata stripper) that run entirely offline in the browser using HTML5 and JS APIs.
What's different
100% client-side — no backend uploads or delays.
Best for
Developers and creators wanting privacy-first tools.

Watched for 9 days · last checked 6d ago

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Krynn Tools

Not responding

A collection of 100+ free browser tools for PDF editing, image editing, and AI writing, with no signup.

FreeNo sign-upData stays with you
What to know▼
How it works
Provides over 100 free browser-based tools for PDF editing, image editing, and AI writing, including compress, merge, split, convert, sign, protect, watermark, crop, resize, background removal, and more.
What's different
No signup and no file upload required — everything runs in the browser.
Pricing
Free.

Watched for 11 days · last checked today

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