Tools that don't upload your data — Spreadsheets

21 match your filters — 19 of them answered our check today.

Watching this group for 18 days · how we check

This week3 new arrivals

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GreenBar Systems

Live

Local-first AI tooling for finance teams' monthly close (bank reconciliation, CSV sorting, PDF parsing, cash forecasting) that keeps sensitive financial data off cloud AI services.

Domain registered 2 months ago

Works offlineData stays with you
What to know▼
How it works
Local-first AI tools for finance teams' monthly close — bank reconciliation, sorting CSV line items, parsing PDFs, and building 90-day cash forecasts — without uploading sensitive financial data to cloud AI services.

Watched for 8 days · last checked 2d ago

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QuickInvoice Plus

Live

A privacy-first iOS invoicing app with no login, no analytics and no servers — everything stays on your device. Free for 3 invoices a month; built for freelancers who don't want SaaS bloat.

FreeNo sign-upData stays with youNo tracking
What to know▼
How it works
An iOS invoicing app that creates professional PDF invoices in under a minute using three templates, with no login and no servers — all data stays on the device.
What's different
No account, no analytics, no servers — invoice data never leaves the device, unlike typical cloud invoicing SaaS.
Pricing
Free tier: 3 invoices/month forever. Plus unlocks unlimited invoices, all templates, logo, reports and CSV export for $5.99/mo or $39.99/yr.
Best for
Freelancers who want simple, private invoicing without SaaS bloat.

Watched for 13 days · last checked 7d ago

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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 27 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

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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 15 days · last checked today

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WA+

Live

A browser extension that reads a WhatsApp Web group's member list from your browser and exports it to CSV or JSON, nothing is sent to a server.

Data stays with youCan export my data
What to know▼
How it works
A browser extension that reads a WhatsApp Web group's participant list directly from your browser's IndexedDB and exports it to CSV or JSON.
What's different
Runs entirely locally with no external servers, unlike other scrapers.
Best for
People who need a WhatsApp group's member list exported without uploading data anywhere.

Watched for 17 days · last checked today

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Nifty Utilities

Live

A toolbox of 100+ free browser-based utilities (file converters, PDF merger, CSV cleaner, an IQ test and more) that run entirely on your device so files never get uploaded.

Domain registered 1 month ago

FreeNo sign-upData stays with you
What to know▼
How it works
100+ browser-based utilities — HEIC to JPG conversion, photo compression, PDF merging, CSV cleanup, receipt generation, an IQ test and more — all running entirely on-device.
What's different
No server means files and data physically cannot leave the device; no uploads, signup or watermarks.
Pricing
Free.
Best for
People needing quick everyday file conversions or utilities without uploading files anywhere.

Watched for 14 days · last checked 2d ago

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How To CSV

Live

60+ free browser-based CSV tools — cleaning, merging, filtering, forecasting, even a chat-with-your-data feature — that process everything locally so nothing leaves your computer.

Domain registered 2 months ago

FreeNothing to installData stays with you
What to know▼
How it works
Provides more than 60 browser-based utilities for analyzing, cleaning, visualizing and transforming CSV files, including anonymization, forecasting, merging, filtering, compression and a chat-with-your-data feature.
What's different
All processing happens in the browser, so files never leave the user's computer.
Pricing
Free.
Best for
Anyone working with CSV files who wants quick fixes without uploading data to a server.

Watched for 12 days · last checked 6d ago

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Invoice to Shopify CSV Parser

Live

A free Chrome extension that uses AI to auto-map supplier CSV, Excel or PDF files to Shopify's import format entirely in the browser, for merchants tired of manually matching inventory spreadsheets.

FreeData stays with you
What to know▼
How it works
Reads supplier CSV, Excel or PDF files, uses AI to auto-map columns to Shopify's import format, and outputs a ready-to-import CSV, all processed locally in the browser.
What's different
Inventory data never leaves the browser.
Pricing
Free for the first 5 files.
Best for
Shopify sellers manually matching supplier inventory files to Shopify's strict CSV template.

Watched for 12 days · last checked 9d ago

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Preflight Kit

Live

Checks a Shopify product CSV for import errors like missing or duplicate handles before you upload it, entirely in the browser.

FreeNo sign-upData stays with you
What to know▼
How it works
Parses the CSV locally and flags row-level issues
What's different
File never leaves the browser, no login needed
Pricing
Free checker; $19 one-off fixed file

Watched for 6 days · last checked 4d ago

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CSVTool.io

Live

A free suite of 62 browser-based CSV tools — viewer, editor, deduping, comparison, repair, and format conversion — that never uploads your file.

FreeNo sign-upNothing to installWorks offline
What to know▼
How it works
Runs locally via web workers; converts to Excel, JSON, SQL, and more; viewer handles files too large for Excel.
Pricing
Free.
Best for
Anyone cleaning or converting CSV files who doesn't want to upload data to a server.

Watched for 6 days · last checked 5d ago

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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 12 days · last checked 9d ago

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StatementSheet

Live

Converts PDF bank statements to Excel/CSV entirely in your browser without uploading them, and checks each one balances to the penny. $19 per batch, not a subscription.

Domain registered 18 days ago

No sign-upWorks offlineData stays with youOpen source
What to know▼
How it works
Converts PDF bank and card statements to Excel/CSV entirely in the browser, without uploading files to a server, and re-verifies each statement against its own running balance to the penny.
What's different
Files never leave the browser (works in airplane mode), and mismatched statements are flagged and made free.
Pricing
$19 per batch, no subscription, no account.
Best for
Anyone converting bank statements to spreadsheets who wants to keep the files off a server.

Watched for 13 days · last checked 11d ago

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MapMyCSV

Live

Remaps a messy CSV export to match the exact column format your CRM, ERP, or accounting tool expects, entirely in your browser — a one-time $29 purchase, no account needed.

No sign-upData stays with youPay onceCan export my data
What to know▼
How it works
Remaps a messy CSV export to match a target import template's exact headers, column order, and date/amount formats, with auto column matching, manual fixes, and row-level validation, entirely in the browser.
What's different
Runs entirely client-side so the data file never leaves the user's machine.
Pricing
Free preview of the first 10 mapped rows; $29 one-time payment unlocks the full export.
Best for
Anyone who needs a CSV export reshaped to fit a CRM, accounting tool, ERP, or database import format without writing a script.

Watched for 13 days · last checked 10d ago

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Keyword Density Checker

Live

A free, browser-only SEO tool that scores keyword density and flags stuffing risk down to word phrases, with nothing uploaded — built for marketers checking pages before publishing.

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
Checks keyword density and stuffing risk down to 1-gram, 2-gram and 3-gram phrases in the browser, with a color-coded health check and CSV export.
What's different
Runs 100% client-side, so content never leaves your device.
Pricing
Free forever, no signup, no caps.
Best for
Marketers and SEO writers checking a page for keyword stuffing before publishing.

Watched for 16 days · last checked 2d ago

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LeakScan

Live

Scans your accounts-payable export in the browser for duplicate vendor payments, and the file never leaves the tab. Built for finance teams doing AP audits, not general spreadsheet work.

Data stays with youCan export my data
What to know▼
How it works
Scans an AP export (CSV/Excel) in the browser for suspected duplicate vendor payments — same invoice paid twice, invoice number variants, duplicate payment references, unapplied credits — and produces a CFO-ready HTML report plus Excel export.
What's different
Runs entirely in the browser under CSP that blocks outbound requests, so the file never leaves the tab.
Best for
Finance teams running accounts-payable audits.
Watch out
The reported result (found $38,125 of planted duplicates, 5/5, with zero false alarms) comes from a blind test the vendor ran itself, not an independent audit.

Watched for 18 days · last checked 2d ago

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Inventorily

Free, private inventory labels & barcode tags

FreeNo sign-upNothing to installData stays with you
What to know▼
How it works
Excel/CSV yüklenir, tarayıcıda 7+ etiket formatında (Avery, Zebra, raf etiketi) ve Code128/UPC/QR barkod üretilir; işlem tamamen tarayıcıda kalır.
Best for
Depo/lojistik envanter ve sigorta/denetim için fotoğraflı envanter raporu isteyenler.

First seen today

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uDocumentViewer

A browser-based viewer and converter for over 200 file formats, including PDFs and CAD/scientific data, that decodes everything locally with no uploads, accounts, or ads.

Domain registered 2 months ago

No sign-upData stays with youNo ads
What to know▼
How it works
Opens over 216 file formats directly in the browser, including PDFs, images, ebooks, spreadsheets, 3D/CAD/PCB files, and scientific formats like DICOM, NIfTI, and FITS, decoding everything locally with JavaScript and WebAssembly; also includes 107 client-side converters, 7 compressors, and 21 editing tools.
What's different
Every file is decoded on-device, so nothing is ever uploaded, unlike typical online converters.
Pricing
No accounts, no quotas, no ads, no paywall.
Best for
Anyone who needs to view or convert an unusual file format without uploading it anywhere.

Watched for 14 days · last checked 2d ago

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Sheet Insights BI

Live

A tool that turns an Excel or CSV file into an interactive in-browser dashboard with forecasting and stats, without uploading your data anywhere.

Data stays with you
What to know▼
How it works
generates executive summary, trend forecasting and data cleaning entirely client-side
What's different
data never leaves your device

Watched for 5 days · last checked today

Details →

AgroPlanner

Live

Clean garden planner and crop ROI accounting tool

Domain registered 3 months ago

Data stays with you
What to know▼
How it works
Lets you design a garden layout and track seasonal finances — logging crop expenses and harvest weights to calculate net profit and ROI.
What's different
Privacy-first interface aimed at replacing bloated spreadsheets for backyard farm accounting.
Best for
Backyard farmers or gardeners tracking crop costs and profit instead of using Excel.

Watched for 9 days · last checked 3d ago

Details →

MyBudgetNerd

Live

Turns bank statement PDFs into categorized spending, a cash-flow forecast and visual breakdowns, processed on your device, without ever linking to your actual bank account.

FreeData stays with youCan export my data
What to know▼
How it works
Users upload bank or credit card statement PDFs, and the app categorizes transactions, generates a spending narrative, visualizes cash flow with a Sankey diagram, and runs a 30-day cash flow forecast, all processed locally on the device.
What's different
Never connects to your bank account or requires bank logins — works entirely from uploaded statement PDFs, processed on-device.
Best for
People who want spending insights and forecasts from their bank statements without linking accounts, including those who want raw CSV/Excel exports.
Watch out
Requires manually uploading statement PDFs rather than live bank data, so it's only as current as the last statement uploaded.

Watched for 18 days · last checked 2d ago

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TrackSpendZ

Live

See Where Your Money Goes - Without Connecting your Bank

FreeNo sign-upData stays with youPay once

First seen today · last checked today

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