buncha.tools
buncha/video & audio/mp3-to-mp4

MP3 to MP4 Converter

MP3 to MP4

Turn an album (or any audio playlist) into a YouTube-ready MP4 with a cover image and an auto-generated tracklist. The chapter timestamps copy out as text you can paste straight into the video description so YouTube turns them into clickable chapter markers.

Audio, cover and encoded video all stay in this browser — nothing is uploaded.

1. Audio tracks

2. Cover image

3. Layout & album info

4. Make MP4

Pairs well with

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About MP3 to MP4 Converter

Turn MP3s into a YouTube-ready MP4 with album cover and auto-generated tracklist. Get clickable chapter timestamps for the description in one click.

Everything happens on your device. Close the tab and it's gone.
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Built browser-first. Run by one developer.
Every tool runs on your device. No tracking pixels, no sign-up to start. The numbers below are pulled live from the registry.
386
Free tools
Across 14 categories
27
AI tools
Powered by Claude API
Files never uploadNo tracking pixelsNo sign-up neededWorks in any modern browser
The handful of AI tools (paraphrase, summarise, blog, captions, etc.) send your prompt text to Anthropic's Claude API to do the work. Files, images, PDFs and video never leave your device. Pick the tools that fit your privacy comfort.