UlvixorFLAC to MP3 Converter
Convert FLAC (lossless audio) files to compressed MP3, significantly reducing the file size at the cost of a small quality loss. The whole process happens in your browser.
How it works
- Select a FLAC file from your device.
- Your browser decodes the lossless audio using the native Web Audio API.
- The result is encoded as MP3 at 128 kbps.
- Listen to a preview of the result directly on the page.
- Download the MP3 file.
Use cases
- Drastically reduce the size of a FLAC music library to save storage space.
- Prepare FLAC audio for older devices or players that don't support that format.
- Share FLAC music or recordings through channels with file-size limits.
- Convert high-fidelity audio downloads to a more portable format for everyday use.
Use cases
- Drastically reduce the size of a FLAC music library to save storage space.
- Prepare FLAC audio for older devices or players that don't support that format.
- Share FLAC music or recordings through channels with file-size limits.
- Convert high-fidelity audio downloads to a more portable format for everyday use.
Common mistakes
- Converting to MP3 while expecting to keep FLAC's characteristic lossless fidelity.MP3 is, by definition, a lossy format. If you need to preserve the original quality, keep the FLAC too and use the MP3 only as a lightweight copy for everyday use.
- Assuming every browser decodes FLAC equally well.FLAC support varies by browser and version. Modern Chromium-based browsers and Firefox support it widely; if the conversion fails, try updating your browser.
- Expecting the resulting MP3 to weigh an exact, predictable fraction of the original FLAC.FLAC compresses losslessly (its size varies with content), while MP3 is encoded at a fixed bit rate (128 kbps). The reduction ratio depends on how heavy the original FLAC was.
Frequently asked questions
No. Decoding and encoding happen entirely in your browser. The audio never leaves your device.
FLAC preserves full quality but takes up much more space. Converting to MP3 makes sense when you prioritize file size or compatibility over maximum fidelity — for example, to listen to music on a device with little storage.
This tool always encodes at 128 kbps. For finer control over the bit rate, use a dedicated audio editor.
The tool shows an error message indicating the file couldn't be read. Try an updated version of your browser, since FLAC support has improved over time.
Alternatives
Programs like FFmpeg, Audacity, or dBpoweramp can convert FLAC to MP3 with more control over the bit rate. This tool is handy for a quick conversion without installing additional software.