Browser-based media converter
Tonvert runs a full FFmpeg engine inside your browser tab. Your file never leaves your device — no upload, no waiting queue, no account, no watermark.
8
conversion tools
0 MB
uploaded to a server
$0
and no sign-up
Eight focused tools, each tuned for one job. Nothing is uploaded.
Turn Apple recordings into universally playable MP3
Open converter →Extract the audio track from a QuickTime video
Open converter →Shrink a lossless WAV by around 90 percent
Open converter →Decode MP3 into uncompressed PCM for editing
Open converter →Keep the audio from a browser or webinar recording
Open converter →Wrap audio in MP4 for platforms that demand video
Open converter →Repackage QuickTime video for Windows and Android
Open converter →Make a Matroska file play on any phone or TV
Open converter →WebAssembly lets us compile the real FFmpeg codebase — the same engine professional editors use — into something your browser can execute locally. When you pick a file, the bytes are read straight from disk into the page, the conversion happens on your CPU, and the result is handed back to you as a download. Nothing is transmitted over the network.
The audio group covers the everyday jobs: M4A, MOV, WAV and WEBM into MP3, and MP3 into WAV. The video group turns MP3 into MP4, and repackages MOV or MKV into MP4 — either instantly with stream copy, or with a full H.264 re-encode when a player refuses the original codecs.
Because FFmpeg is a real program, not a thin wrapper, the engine is about 32 MB and is fetched the first time you press Convert. After that your browser caches it, and the second conversion starts immediately. Nothing large is downloaded until you actually ask for a conversion.