MP3 Converter
Turns audio or video into MP3 in your browser, whether you're extracting or re-encoding.
Drop an audio or video file here
Everything happens on your device — your files are never uploaded.
file
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Converting…
Done
What this does
This decodes the audio track from your file and re-encodes it as an MP3 with a LAME-based encoder. If you drop a video, the picture is discarded and only the sound is kept.
MP3 is lossy, so re-encoding throws away some audio data. Converting an already-compressed file (AAC, OGG, another MP3) means a second round of loss; converting from WAV or FLAC is a single pass. Tags like title and artist are not carried over — the output is a plain MP3 of the audio.
How it works
- 1 Drop any audio or video file, or pick it from your device.
- 2 Hit Convert to MP3 and watch the progress bar encode.
- 3 Download your MP3. It never leaves your browser.
Built with open source
- Mediabunny — Converts and edits video and audio in the browser via WebCodecs. Add-on encoders cover MP3, AAC, and FLAC. · MPL-2.0
Frequently asked
Can I get the MP3 out of a video? +
Yes. Drop a video like MP4, MOV, WEBM, or MKV and the audio gets extracted and encoded to MP3. The video itself is dropped.
Is my file uploaded to a server? +
No. Audio re-encoding and audio extraction from video both run in your browser with WebCodecs and an in-browser MP3 encoder. Nothing leaves your device.
Does converting to MP3 lose quality? +
Some, yes. MP3 is a lossy format, so encoding drops audio data that can't be fully recovered. Going from a lossless source like WAV or FLAC loses the least; re-encoding an existing MP3 or AAC adds a second round of loss.
Why does it take a few seconds? +
Browsers have no built-in MP3 encoder, so the audio is decoded and re-encoded with a LAME-based encoder. Longer files and videos take a bit more time.
Are the title, artist, and other tags kept? +
No. The converter writes a plain MP3 of the audio without copying ID3 tags or cover art from the source. You can add metadata afterward in a tag editor.
Is there a limit on file size or length? +
There's no fixed limit. The whole file is decoded and encoded in your browser, so very long or large files are bound by your device's memory.
Can I convert several files at once? +
This page handles one file per conversion. Convert each file in turn, or start over to load the next one.
Which browsers does it work in? +
Recent versions of Chrome, Edge, Firefox, and Safari. It relies on WebCodecs for decoding plus an in-browser MP3 encoder, so an up-to-date desktop browser works best.