Audio & Video
10 tools
Convert audio and video without uploading a single byte. Audio decodes with your browser's own engine; video runs on ffmpeg compiled to WebAssembly, downloaded once and cached. Slower than a server farm — and completely private.
- Nothing is uploaded, ever
- MP3, WAV, MP4, MOV and more
- No length watermarks or fees
Audio
Video
Frequently Asked Questions
How can video convert without uploading?
The tools ship ffmpeg — the same engine desktop converters use — compiled to WebAssembly. Your browser downloads it once (about 30 MB), caches it, and every conversion after that runs on your own device.
Is browser conversion slower than an online service?
Encoding runs at roughly the speed of your own computer — about real-time for video. What you save is the upload and download of the file itself, plus every privacy question.
Which formats are supported?
Audio: MP3, WAV, M4A/AAC, OGG/Opus and FLAC in; MP3 and WAV out. Video: MP4, MOV, WEBM and GIF in; MP4, MP3 and GIF out.