Audio converter
Convert audio to MP3 or WAV — from M4A, OGG, FLAC, WAV, MP3 and more. Private — no upload
Click to choose or drag & drop audio files here
MP3, WAV, M4A/AAC, OGG, FLAC, WEBM · convert many at once
Notes
MP3 is compressed and plays everywhere; a higher bitrate means better quality and a bigger file (192–320 kbps is roughly CD quality). WAV is uncompressed and lossless — larger, but ideal for editing. Input can be almost any common format your browser can read: MP3, WAV, M4A/AAC, OGG, FLAC or WEBM.
Everything runs on your device — nothing is uploaded. A long track takes a few seconds to encode.
How to use the audio converter
- Drop in one or more audio files (MP3, WAV, M4A, OGG, FLAC…).
- Pick MP3 (choose a bitrate) or WAV output.
- Download each converted file.
Common uses
- Turn an M4A/AAC voice memo or song into an MP3.
- Convert MP3 to WAV for editing in an audio app.
- Standardize a batch of clips to one format.
- Get a smaller MP3 from a large WAV.
How it's built & why it's safe
Audio is decoded with the browser's Web Audio API (decodeAudioData) into raw PCM, then re-encoded locally — WAV is written straight from the samples and MP3 uses the open-source lamejs encoder. It all runs on your device, so your files are never uploaded.
Frequently asked questions
Which formats can I convert?
Input can be MP3, WAV, M4A/AAC, OGG, FLAC or WEBM — anything your browser can decode. Output is MP3 or WAV.
Is my audio uploaded?
No. Files are decoded and re-encoded entirely in your browser, so they never leave your device.
What MP3 bitrate should I choose?
128 kbps is fine for speech; 192–320 kbps is better for music (320 is the highest-quality MP3). A higher bitrate means a bigger file.
Can it output M4A or AAC?
Not yet — browsers can't natively encode AAC/M4A, so the converter outputs MP3 and WAV, which it can create reliably and offline.