Free online tools, built from real work.

Every tool here began as a problem I hit in my own work — the fix became a tool I use daily, and it’s free for anyone who needs the same thing. Everything runs in your browser: no accounts, no ads, nothing uploaded.

A true tool does exactly what its page says. That’s the promise behind the name — and the bar every tool here is held to.

in-browserno signupno ads

Developer tools

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Pip offline command generator popularBuild pip download and install commands for offline, cross-platform Python packaging. SVG to interactive HTMLTurn any SVG into a standalone HTML file with drag-to-pan and scroll-to-zoom. SQL query optimization tool popularGet index suggestions and rewritten SQL from a pasted query, with scan detection. Parquet, CSV & JSON viewer and converter popularView, query, and convert tabular files in the browser, powered by DuckDB-WASM. XSD generatorInfer an XSD schema from XML — elements, attributes, and data types.

Map & GIS tools

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Geo file viewer & HTML map hub newView geo files, export standalone maps, or inspect NMEA 0183/2000 logs and AIS vessel tracks. CSV to HTML mapConvert CSV into a standalone HTML map with automatic coordinate detection and category colors. Excel to HTML mapTurn Excel sheets into a self-contained HTML map with multi-sheet support. GeoJSON to HTML mapRender points, lines, and polygons as an offline HTML map file. GeoJSON to Geobuf converterConvert GeoJSON to Geobuf and back, with real file-size comparison and round-trip checks — in your browser. Multi-stop route planner popularOrder up to 200 addresses by the shortest driving route, with map preview and CSV export.

Excel tools

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Unmerge cells in ExcelUnmerge every merged cell in an Excel file in one click, optionally filling values down.

Document tools

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Word multilevel list templatesPre-configured Word templates with automatic heading numbering — academic, legal, government, business, technical, and Chinese styles.

Finance tools

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Average down calculatorLower your cost basis and breakeven price with a staged buy plan for stocks or crypto. Bitcoin DCA calculatorPlan dollar-cost averaging and see your new average cost and breakeven price. Rich Dad Poor Dad gameSix money decisions that teach assets, liabilities, and cash flow. A Dog Called Money gameA kids' money game built on the 50-40-10 rule, with a talking dog. The Richest Man in Babylon gameTest yourself on the seven cures for a lean purse and the five laws of gold. Millionaire Fastlane quizSeven laps through the CENTS framework and the wealth equation. Almanack of Naval Ravikant gameNaval's wealth and happiness principles as six graded decisions.

Health tools

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Adult lazy eye vision trainingMonocular perceptual learning with Gabor patches, at home.

Time & date tools

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Time & date toolsAnalyze a date range or generate a reusable list of dates and times.

Card games

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Traditional Chinese card gamesChinese Ten, Twenty-Four, Rank-Match, and Sevens — playable in the browser.

Why these tools exist

Each tool here started as a problem I hit in my own work — not a keyword — and none of them ever send your data anywhere.

The usual “free” toolTrueTool
“Upload your file” to convert itYour file never leaves the browser
Create an account to see the resultNo account, no email, no paywall
Ads dressed up as download buttonsOne button that does exactly one thing
“Unlimited free” until you hit the wallFree, with nothing to upgrade

Read the full story — which annoyance built which tool

Need a tool that is not here yet? Request it — free, and I read every one.

TrueTool is a growing set of free, privacy-first online tools for developers and everyday work — developer utilities (SQL optimizer, Parquet/CSV/JSON viewer, SVG to HTML), Excel helpers, map & GIS converters, finance calculators and health tools. Files are processed locally and never uploaded: there is no signup and no ads.