Convert Audio
Pick the file, pick the output format, download. The conversion runs on ffmpeg compiled to WebAssembly inside the tab, so the audio goes nowhere — which matters when the file is a recorded meeting, an interview or a consultation.
# processed in your browser. your content never leaves.
# page isolated to unlock wasm multi-threading.
How it works
Each format uses the encoder ffmpeg treats as its default: libmp3lame for mp3, AAC for m4a, libvorbis for ogg, libopus for opus, 16-bit PCM for wav and FLAC for flac. Two conversions deserve attention. Going from one lossy format to another re-encodes and degrades, even at a higher bitrate — a 128 kbps mp3 converted to a 320 kbps mp3 takes more space and sounds the same or worse. And going from mp3 to wav or flac recovers nothing: what the mp3 threw away does not come back, the file just grows. The tool warns in both cases rather than letting you find out later.
- Output to mp3, m4a (AAC), ogg (Vorbis), opus, wav and flac
- Bitrate from 96 to 320 kbps, with the effect of each range explained
- Sample rate and channel count adjustable, or preserved as they are
- A warning when the conversion you asked for cannot improve on the source