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Guide1 min readUpdated August 26, 2026

How to convert MP3 to FLAC

Short answer

Add your MP3 to an MP3-to-FLAC converter, keep FLAC output, and download. FLAC is a lossless container that some tools require — but converting from a lossy MP3 cannot restore detail the MP3 already discarded.

Why convert MP3 to FLAC

FLAC is a lossless format: it compresses audio without discarding any detail, so it is smaller than WAV while staying bit-for-bit accurate. Some players, archives, and editing pipelines expect FLAC input, and converting an MP3 to FLAC is the quickest way to satisfy that requirement without leaving your browser.

Convert MP3 to FLAC

  1. Add the MP3Drop in one or more MP3 files. They decode locally in your browser tab.
  2. Keep FLAC outputSelect FLAC as the target format. MP3 and WAV output are available too.
  3. Choose bit depth16-bit is standard; 24-bit adds headroom for editing.
  4. DownloadSave one FLAC, or export a batch as a ZIP.
Try it: MP3 to FLAC ConverterConvert MP3 to FLAC locally — files never leave your browser tab.Open tool
FLAC cannot undo MP3 compressionFLAC is lossless, but the source MP3 already threw away detail during its original encode. A FLAC made from an MP3 is a faithful, lossless copy of a lossy file — it does not sound better than the MP3 it came from. Convert from a true lossless source when one is available.

FLAC vs WAV for storage

  • FLAC is lossless like WAV but typically 40-60% smaller
  • FLAC stores tags and metadata cleanly, which WAV handles poorly
  • FLAC output can still be larger than the original lossy MP3
  • Use WAV when an editor needs uncompressed input; use FLAC to archive

References

Questions

Does MP3 to FLAC make the audio lossless?

The FLAC file is a lossless copy, but it only preserves what the MP3 contained. Detail lost during the original MP3 encode stays lost — FLAC cannot rebuild it.

Is FLAC smaller than WAV?

Yes. FLAC applies lossless compression, so it is usually 40-60% smaller than the equivalent WAV while remaining bit-for-bit accurate.

Are my MP3 files uploaded?

No. The converter engine runs in your browser tab, decoding and exporting locally. Your files are never uploaded or stored on a server.

Keep reading

Guide1 min readHow to convert MP3 to WAVConvert MP3 to uncompressed WAV in your browser for editing and audio workflows. Learn when WAV helps, what bit depth to pick, and why quality is not restored.Read
Comparison1 min readMP3 vs WAV: which should you use?WAV is uncompressed and lossless; MP3 is compressed and much smaller. Here is when each makes sense and how to convert between them.Read
Explainer1 min readWhat is audio bitrate?Audio bitrate is how much data per second an audio file uses, measured in kbps. Here is how it affects quality and file size, and which bitrate to pick.Read