Audio format convert — MP3 / WAV / M4A / OGG / FLAC
Convert audio files to mp3 / wav / m4a / ogg / flac. ffmpeg.wasm picks an encoder based on the chosen extension and re-encodes the file entirely in your browser. Supports batch processing and a single ZIP download.
How to use
Drop audio files and pick a target format (mp3 / wav / m4a / ogg / flac). Click Convert — ffmpeg.wasm picks the right encoder (lame / pcm / aac / libvorbis / flac) for the target extension and re-encodes locally. Batch processing and a ZIP download are supported. ffmpeg.wasm (~30 MB) downloads on first run.
FAQ
- Is the audio uploaded?
- No. ffmpeg.wasm runs inside your browser; audio never leaves your device.
- Does quality drop for lossless → lossy?
- Yes — mp3 / m4a / ogg are lossy, so re-encoding from wav / flac introduces loss. Going lossy → lossless can't restore quality past what's already encoded.
- Can I set the bitrate?
- Currently it uses each format's default quality.
- Is M4A here AAC or ALAC?
- AAC. ALAC isn't supported yet.
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