MP4toMP3
Convert video files into MP3 audio — simple, free.
What it does
Convert MP4 to MP3 online for free. The conversion runs entirely in your browser, so your video is never uploaded. No signup, no watermark, up to 320 kbps.
Extract crisp, portable MP3 audio from your videos in a few clicks. Your files are processed privately in your browser—no upload queue and no software to install. Turn MP4 videos into clear, portable audio without creating an account. The experience stays simple while giving you control where it matters. Choose the quality that fits your content—from compact speech audio to detailed 320 kbps music. Your videos stay on your device instead of being sent to a remote conversion server. Add multiple lectures, meetings or recordings and convert them together while keeping filenames organized. No complicated menus or codec settings. Add a file, choose a quality and download your audio. Choose one…from mp4tomp3.to
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More work this month
the category →
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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 · 17d ago · simedw.com