Convert Audio to MP3 — Free, No Upload
Turn any audio file into an MP3 that plays on everything.
Drop a file here
or click to choose a file
Runs on your device Your file is processed by your own browser and is never uploaded to a server.
Short answer
Any common audio format can be converted to MP3 for free in a web browser. The source is decoded and re-encoded with the LAME MP3 encoder at a chosen bitrate, commonly 192 kbps. Because the conversion happens on the visitor's own device, the file is never uploaded and there is no limit on its length.
At a glance
| Accepts | WAV, M4A, AAC, FLAC, OGG, Opus, WMA |
|---|---|
| Produces | MP3 (LAME) |
| Processing | In your browser |
| Price | Free, no limits |
| Account | Not required |
MP3 remains the format that plays without question on car stereos, cheap MP3 players, older phones, gym equipment and every browser ever shipped. Converting to it is usually about compatibility rather than size — the file you already have may sound fine but refuse to open on the device you want to use it on.
192 kbps is the default because it is transparent for speech and close to transparent for music. Choose 320 kbps when converting from a lossless source such as WAV or FLAC and the result matters; choose 128 kbps when it is going somewhere with limited storage.
How to use it
- 1
Add the audio file
Drop in a WAV, M4A, AAC, FLAC, OGG, Opus or WMA file — or the audio track of a video.
- 2
Choose the bitrate
192 kbps suits most material. Pick 320 kbps for music from a lossless source, 128 kbps for speech.
- 3
Convert
The file is decoded and encoded to MP3 on your device.
- 4
Download the MP3
Save the file and play it anywhere.
Frequently asked questions
Which formats can be converted?
MP3, WAV, M4A, AAC, FLAC, OGG, Opus, WMA, AIFF and the audio track of MP4, MOV, MKV and WebM files. If your browser or FFmpeg can decode it, this tool can read it.
Does converting to MP3 lose quality?
Converting from a lossless source such as WAV or FLAC introduces one generation of lossy encoding, which is inaudible to most listeners at 192 kbps or above. Converting from another lossy format is a second generation and loses slightly more.
Is there a limit on file length?
No limit is imposed by the service. A two-hour recording converts fine on a normal laptop. Very long files use more memory, so close other tabs if the page becomes sluggish.
Can I convert a file from a streaming service?
No. This tool works on files you already have on your device. Files bought from a store that applies DRM cannot be decoded by any general-purpose converter.
Is my file uploaded?
No. The conversion runs inside your browser. You can disconnect from the internet after the page loads and it still works.