Convert a lossless FLAC file to space-saving MP3 locally in your browser - for a phone or car stereo. No upload.
Running locally on your device ...
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
FLAC (Free Lossless Audio Codec) stores music losslessly, but unlike MP3, not every car radio, budget player or old stereo system knows it. For everyday playback on the go or on devices with little storage, MP3 is often the more practical choice.
This tool decodes the FLAC file fully losslessly to PCM and then encodes it with libmp3lame to MP3 at the chosen bitrate. Since FLAC itself discards nothing, the chosen MP3 bitrate alone decides the resulting quality.
For your music archive, it pays off to keep the FLAC original and generate only an MP3 copy for on the go - a high bitrate like 256 or 320 kbps keeps the audible difference minimal. Everything runs locally in the browser with ffmpeg.wasm.
| Input formats | FLAC |
|---|---|
| Auto-conversion | MP3, WAV |
| Output format | MP3 |
| Batch processing | No |
| Processing | Locally in your browser (WebAssembly) |
| File upload | None |
Limitations: The conversion to MP3 is lossy - the FLAC original remains the better source for archiving. Very high resolutions (e.g. 24-bit/192 kHz studio masters) are downconverted to the values MP3 supports. One file per run.
No, the conversion runs entirely locally in the browser.
No - keep it for your archive. Generate the MP3 only as a smaller copy for a phone or car.
256 or 320 kbps keep the audible difference from the FLAC original minimal for most ears.
Yes, use "Audio converter" with FLAC as the selectable target format for that.