Convert audio to MP3, WAV, M4A, FLAC or OGG in your browser. Works with Opus, AAC and the sound of videos. Free, no sign-up, nothing uploaded.
Runs in your browser. Your files are never uploaded. How it works
Audio Converter turns any audio file into MP3, WAV, M4A, FLAC or OGG. It reads MP3, WAV, M4A / AAC, FLAC, OGG, Opus, WebM and the sound of MP4, MOV and MKV videos, and runs entirely in your browser, so your recordings and music never leave your device.
How to convert audio
Click Choose an audio file or drop it on the page.
Pick the format under Save as and, for MP3, M4A and OGG, the quality.
Click Convert, listen to the result and download it.
Which format for what
Format
Best for
Size of 3 minutes
MP3 192 kbit/s
Playing anywhere, music
about 4 MB
M4A / AAC
iPhone, Apple Music, smaller files
about 3–4 MB
OGG / Opus
Speech, voice notes, web
about 1–3 MB
FLAC
Archiving without loss
about 15–20 MB
WAV
Editing in an audio program
about 30 MB
Private by design
Your files are processed on your own device and never uploaded. See how it works.
Frequently asked questions
Is my audio uploaded?
No. The audio is processed in your browser, on your device, and never sent anywhere.
Which formats can it read?
MP3, WAV, M4A / AAC, FLAC, OGG, Opus, WebM and the sound of MP4, MOV and MKV videos.
Which format should I choose?
MP3 plays everywhere. M4A is smaller at the same quality and is what iPhones use. WAV and FLAC are lossless: WAV for editing, FLAC for archiving at about half the size. OGG / Opus is the smallest for speech.
Does converting MP3 to WAV improve the quality?
No. It makes the file lossless from now on (no further loss when you edit it), but it cannot bring back what MP3 compression removed.
Is there a limit?
No fixed limit. Very long files (several hours) may not fit in a phone's memory.