Audio Tools
Convert, compress and trim audio right in your browser — MP3, WAV, FLAC, M4A, OGG, Opus and more. Nothing is uploaded.
About Audio Tools
These audio tools run entirely inside your browser with a WebAssembly build of ffmpeg, so your file is never uploaded to a server — private, free, and with no watermark. Convert between all the common formats (MP3, WAV, FLAC, M4A, AAC, OGG, Opus, AIFF, AC3, WMA and more), shrink a file with the audio compressor, or cut a clip with the trimmer.
Because the work happens on your own device, these are best for everyday audio files rather than hour-long recordings. The first time you use one, your browser loads the audio engine once (shared with the video tools) and then caches it, so later runs start quickly. Pick the tool you need and drop your file in.
Frequently asked questions
Are my audio files uploaded?
No. Everything runs in your browser with ffmpeg compiled to WebAssembly, so your file never leaves your device.
Which formats can I convert between?
MP3, WAV, FLAC, M4A (AAC), AAC, OGG (Vorbis), Opus, AIFF, AC3, WMA and AU. You can convert from almost any audio or video file into any of these.
Is there a size or length limit?
The processing runs on your device, so very large or very long files are slower and use more memory. Everyday music and voice files work best.
Do I lose quality when converting?
Converting to a lossless format (WAV, FLAC, AIFF) keeps full quality. Lossy formats (MP3, AAC, OGG, Opus) re-compress, so choose a higher bitrate if quality matters.