🔄 AUDIO CONVERTER
MP3, WAV, M4A — your way.
Drop any audio file, pick the format you want, download. Runs in your browser — nothing uploaded, no signup. MP3 encoding uses lamejs (MIT, patent-free).
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Click or drop an audio file
MP3 · WAV · M4A · OGG · FLAC · AAC
Source file
Convert to
MP3 bitrate
How it works. Your browser's
decodeAudioData handles input (works for MP3,
WAV, M4A, OGG, FLAC, AAC — whatever your browser supports
natively). For WAV output we write a standard RIFF/WAVE
header + raw 16-bit PCM. For MP3 output we use
lamejs (MIT-licensed, MP3 patents expired in
April 2017 — fully free to use). All processing happens
locally in your browser; nothing is uploaded to any server.
Large files (60+ minutes) may take 20-60s to encode to MP3
depending on bitrate and your CPU.