Tools that don't upload your data — Runs on Linux

10 match your filters — 10 of them answered our check today.

Watching this group for 18 days · how we check

This week4 new arrivals

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Pandia

Live

Native desktop app for opening and editing multi-gigabyte JSON files instantly, for developers who hit size limits in browser-based JSON viewers.

FreeWorks offlineData stays with youOpen source

What to know▼

How it works: Opens huge files with no upload, shows JSON as Tree, Code, Grid, Graph, or Compare views, generates types for 9 languages.
What's different: Handles multi-gigabyte files offline where most JSON tools choke or require upload.
Pricing: Free
Watch out: Desktop-only (macOS, Windows, Linux).

Watched for 5 days · last checked today

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An open-source, template-based design tool for building App Store and Play Store screenshots, feature graphics, and preview videos entirely in your browser or desktop app, with no account or upload required.

Domain registered 13 days ago

FreeNo sign-upData stays with youOpen source

What to know▼

How it works: pick a template, drop in your app screens, and export every required store size, including MP4 previews
What's different: an optional AI agent can build the whole listing from raw screenshots
Best for: app developers and designers preparing store listings

Watched for 7 days · last checked 6d ago

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Melia

Live

A native Linux desktop email client that connects straight to your IMAP/SMTP mail servers with no cloud relay, middleman account or telemetry, as an alternative to Thunderbird or Evolution.

FreeWorks offlineData stays with youPay once

What to know▼

How it works: A native Linux desktop email client that connects directly to your mail servers over IMAP and SMTP, storing everything locally in a SQLite database and syncing credentials through the OS keyring so it works fully offline.
What's different: No cloud relay, middleman account, or telemetry — mail stays on your own machine, unlike hosted alternatives.
Pricing: Free for one account with full functionality; a one-time $10 unlock removes the account cap.
Best for: Linux desktop users looking for a native alternative to Thunderbird, Evolution, Geary or Mailspring.

Watched for 18 days · last checked today

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FastCompressor

Live

Compresses images and video (JPG, PNG, TIFF, MP4, GIF) entirely on your device with no upload to a server — for Mac, Windows and Linux, privacy-focused.

Works offlineData stays with you

What to know▼

How it works: Compresses JPG, PNG, TIFF, MP4 and GIF files, processing them locally on-device rather than uploading them to a server, via web tools or a dedicated offline desktop app for Mac, Windows and Linux.
What's different: Local, privacy-focused processing rather than server-side upload-based compression.
Best for: Anyone who wants to compress images or video without sending files to a third-party server.

Watched for 18 days · last checked 11d ago

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ScreenGlimpse

Live

A free screen recording app for Windows, macOS, Linux, and web that automatically zooms the cursor on clicks, processing everything on-device without upload.

FreeNo sign-upWorks offlineData stays with you

What to know▼

How it works: Highlights the cursor and auto-zooms on clicks during recording, with no upload or account required to start.
Pricing: Free.
Best for: People who want a directed-looking screen recording without manual editing or cloud upload.

Watched for 12 days · last checked 6d ago

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Share2Me

Live

Sends files and clipboard text directly between devices over encrypted peer-to-peer connections, no account or cloud storage.

Data stays with you

What to know▼

How it works: WebRTC transfer with end-to-end AES-256 encryption via QR code or link
What's different: No sign-up, no upload limits
Best for: quick cross-device transfers across Windows, macOS, Linux, iOS, Android

Watched for 4 days · last checked 3d 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 18 days · last checked 2d ago

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Prizmi

Live

An AI assistant that drafts messages, organizes files, and fills out forms and flight check-ins on its own, installed on your computer for everyday tasks.

Works offlineData stays with you

What to know▼

How it works: You message Prizmi in plain language and it acts on your phone or computer — drafting texts and emails, organizing files, filling out web forms and flight check-ins, and running scheduled tasks — while proactively reaching out when it notices something matters.
What's different: Takes action directly on your connected devices rather than just answering questions, but never clicks Submit or Pay itself, keeping the user in control of final actions.
Best for: Anyone wanting a proactive assistant that runs tasks on their own Mac, Windows or Linux machine, described as built for grandparents through developers.

Watched for 18 days · last checked today

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Patterns

Live

Private OCD/ERP tracker across desktop and mobile that logs obsessions, compulsions, triggers and exposure practice with no cloud sync.

Domain registered 20 days ago

No sign-upWorks offlineData stays with youNo ads

What to know▼

How it works: Tracks obsessions, compulsions, mood and exposure exercises across iOS/Android/desktop
What's different: No accounts, no cloud sync — data stays on-device
Best for: People doing ERP therapy who want a private tracking journal

Watched for 6 days · last checked today

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LumenPass - Password Manager

Live

A password manager built on the open, KeePass-compatible KDBX format, storing logins, passkeys, cards and TOTP codes in one encrypted vault with Face ID autofill.

Domain registered 3 months ago

Data stays with youNo adsNo tracking

What to know▼

How it works: Stores logins, passkeys, credit cards, secure notes and TOTP codes in an encrypted vault, built on the open KDBX format compatible with KeePass and KeePassXC, with one-tap AutoFill and Face ID across iPhone, iPad, Mac, Windows and Linux.
What's different: Uses the open KDBX format instead of a proprietary vault, so you're not locked into one vendor, with zero-knowledge on-device encryption before sync.
Best for: People wanting a KeePass-compatible password vault across Apple, Windows and Linux devices without vendor lock-in.

Watched for 13 days · last checked 2d ago

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