Audio converter

Converts between MP3, WAV, OGG and M4A — and accepts a video file too, taking its soundtrack. Everything is decoded and re-encoded on your own machine.

This tool runs entirely in your browser — nothing you type or open here is ever uploaded. You can disconnect from the internet after the page loads and it still works.

Drop files here or click to choose

One audio or video file

up to 400 MB

Video work happens on your own processor, so it is slower here than in a native app — expect roughly real time, and the engine downloads once per visit (about 31 MB). Nothing is uploaded, which is the trade.

Need more than this page can do?

The PDF Toolbox desktop app compresses, redacts with verified removal, OCRs scans, repairs damaged files, converts to PDF/A and handles 500-page documents — all offline, on your machine, with the same promise: nothing ever leaves it. See everything it does →

Audio converter

Drop files here or click to choose

Need more than this page can do?

More video & audio tools

🎬 Compress video

✂️ Trim video

🎵 Video to MP3

🎞️ Video to GIF

🔇 Mute video

📉 Resize video