Convert audio to any format
Your files are processed on your device. We never upload them.
Audio is read and written with Mediabunny. MP3 files are made with LAME and FLAC files with libFLAC; browsers without their own AAC encoder use FFmpeg's. Apple Lossless files follow Apple's ALAC code.
How to convert audio to any format
- 01A ▸Choose an audio file, or drop it on the page. A video works too; its sound is converted.
- 02A ▸Pick the format to convert to, and a quality for MP3, M4A, or OGG.
- 03A ▸Select Convert, listen to the result, and download it.
Questions
Which formats can I convert from?
MP3, WAV, M4A and AAC, FLAC, OGG (Vorbis and Opus), OPUS, AIFF, and WebM. The sound of MP4 and MOV videos works too. Apple Lossless (ALAC) M4A files open in Safari only.
Which format should I choose?
MP3 when it needs to play everywhere. M4A (AAC) sounds a little better than MP3 at the same size and suits iPhones. WAV and AIFF are uncompressed, for editing. FLAC is lossless but about half the size of WAV. OGG and OPUS make the smallest files for the web and voice.
Are my files uploaded?
No. Your files are processed on your device. We never upload them.
Does converting lose quality?
Converting to MP3, M4A, OGG, or OPUS compresses the sound, so a little detail is lost; the Best setting keeps that loss very hard to hear. Converting to WAV, FLAC, or AIFF keeps every sample of the sound you have, but can't bring back detail an MP3 already lost.
Why can't I save OGG or OPUS?
Saving Opus needs the browser's own Opus encoder. Chrome, Edge, and Firefox have one, and so does Safari from version 26. Older Safari can still save MP3, M4A, WAV, FLAC, and AIFF.
Is there a size or daily limit?
No daily limit and no watermark. In current browsers, converting to MP3, M4A, OGG, OPUS, or FLAC streams through the file, so long recordings need little memory; WAV and AIFF hold the whole sound. Safari before version 26 decodes the whole file first, so a very long file can be too much for an older iPhone; the page warns you before it starts. Files over 100 MB get a warning too.
Can I convert several files at once?
One file at a time for now. Each conversion takes seconds, and the page keeps your chosen format for the next file.