Audio Converter
Change sound files from one type to another: MP3, M4A, WAV or OGG. Convert one file or a whole batch and download them in one ZIP.
Files never leave your device
Choose one or more sound files from your phone or computer.
Choose sound files to convert.
Working…
Keep this tab open. Large files can take a little while on a phone.
Done
Send it
Opens your phone's share menu — pick any app.
These open in a new tab. Your file is downloaded first; you attach it there yourself.
Your file is downloaded — attach it in the chat or email.
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How to use it
- Step 1: Tap the box and choose one or more sound files, such as MP3, M4A, WAV, OGG, OPUS or FLAC.
- Step 2: Choose the type to convert to, the quality, and whether you want mono or stereo and a different sample rate.
- Step 3: Tap Convert, then download each file, or one ZIP when you chose several.
Your files never leave your device
This tool runs entirely in your browser. Nothing is uploaded to a server, so your documents and photos stay private. It is free, has no watermark and needs no sign-up.
Frequently asked questions
Which types can I convert from and to?
You can open MP3, M4A and AAC, WAV, OGG and OPUS, FLAC, WebM and the sound of MP4 and MOV videos. You can save as MP3, M4A, WAV and, in browsers that can write it, OGG. AMR, an old phone recording type, is not supported.
Which type should I choose?
MP3 plays almost everywhere, so it is the safe choice. M4A is a little smaller at the same quality. WAV is not compressed, so it is large but has no further loss. OGG with Opus is small and good for speech.
What do mono and the sample rate do?
Mono mixes two channels into one and makes the file smaller, which suits voice. The sample rate is how many times per second the sound is measured: 22,050 Hz is fine for speech, 44,100 Hz is the standard for music and 48,000 Hz is common in video.
Can I convert many files at once?
Yes. Add as many as you like. They are converted one after another, and you get a ZIP. If one file cannot be read, the others are still converted and the page names the one that failed.
Does converting lose quality?
Going from one compressed type to another, such as M4A to MP3, adds a small loss, so pick a higher quality such as 192 or 256 kbps. Going to WAV adds none, but the file is big. Your originals are never changed.
Where does the converting happen?
No upload takes place. Everything runs inside your browser, on your device. Your recordings and music never go to our servers or anyone else.
Read the guide: How to Convert M4A to MP3 →