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Convert audio online

Change the format of any audio file: MP3, WAV, OGG, M4A, FLAC, AAC, OPUS or WMA in, and MP3, WAV, OGG, M4A or FLAC out. Conversion runs in your browser with FFmpeg — nothing is uploaded.

Your files never leave your browser

How to use

  1. 1

    Pick the output format.

  2. 2

    Drop your audio files into the box.

  3. 3

    Download each converted file or all of them as a ZIP.

FAQ

Are my files uploaded?

No. FFmpeg runs in your browser as WebAssembly. Files never leave your device.

Which quality settings are used?

MP3 at 192 kbps, M4A (AAC) at 192 kbps, OGG Vorbis quality 5, WAV 16-bit PCM and FLAC lossless.

Will converting improve quality?

No. Converting a lossy file (MP3) to WAV or FLAC does not restore lost detail — it only makes the file larger.

Is there a size limit?

Up to 256 MB per file. The first run downloads the FFmpeg engine (~30 MB, cached afterwards).

Related tools

Cut MP3 onlineTrim any audio file in your browser. Set start and end points on the waveform and download the cut as MP3. Files never leave your device.Convert MP4 to MP3Extract audio from MP4 video files and save as MP3. Runs entirely in your browser using FFmpeg WebAssembly — no upload required.Compress video onlineReduce video file size in your browser using FFmpeg WebAssembly. Choose a compression preset and download the result. Files never leave your device.