Got My Tools
Free online tools that never leave your browser
What it does
Got My Tools is a free collection of everyday calculators, converters, and file utilities — mortgage and loan calculators, PDF/Excel/image converters, JSON/regex/dev tools, and text utilities. Unlike most "free tool" sites, nothing you upload or type is ever sent to a server: every tool runs entirely client-side in your browser, so your files and data never leave your device.
Free online tools. Nothing ever leaves your device.
No sign-up, no clutter. Pick a category below — every tool comes with a clear result, plus the reasoning behind it so you're never just staring at a number. Everything runs right in your browser, so your files and numbers are never uploaded anywhere. Mortgage, loan, savings, retirement, and other financial calculators — with plain-language explanations for every result. Merge, split, compress, and convert PDF files, right in your browser. Spreadsheet converters and utilities for everyday Excel and CSV tasks. Resize, compress, crop, and convert images without uploading them anywhere. Unit, currency, and file-format converters for quick everyday conversions. JSON formatters,…from gotmytools.com
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More dev tools this month
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Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com