Toolnjoy
194 free Korean web tools, no sign-up, all in-browser
What it does
Korean calculators are scattered across ad-heavy blogs. Toolnjoy puts 194 of them in one place, in Korean, with no login and no install. Salary, tax, real-estate and loan calculators on 2026 Korean rates. 14 PDF tools (merge, split, compress, redact, sign, OCR). Background removal, HEIC to JPG, screen recording, video trim, GIF export. Hangul text tools, and 250 coding lessons in 10 languages graded in the browser. Files never leave your device. PDF, image and video tools run client-side.
Does the same job
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Launched alongside, August 2026
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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