Converter247
Free online tools for conversion and file preparation.
What it does
Converter247 helps you convert units, images, data formats, text, and calculations with browser-first tools, visible guidance, and practical reference guides.
Search 248 tools across measurement, developer, text, image, and calculator workflows. Converter247 is built for quick answers, readable formulas, and practical checks before you copy results into forms, files, uploads, or reports. Converter247 is a browser-first utility library for people who need a value, file, or format changed accurately without digging through separate apps. It covers unit conversions, image format changes, developer data tools, text utilities, calculators, color formats, storage units, and other everyday technical tasks. The site is useful for students checking homework units, travelers comparing local measurements, ecommerce teams preparing product specs, developers…from converter247.com
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Open-source GTM skills for technical founders
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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