Convertor

Audio converter

MP3 to FLAC

Re-wrap your MP3 audio as a FLAC file for players and archives that require lossless.

Runs in your browser
MP3FLAC100% local · no upload

Drop your mp3 here, or browse

Up to 500 MB · .mp3

Runs 100% in your browser — your file is never uploaded.

Guide

How to convert mp3 to flac

  1. Pick your MP3 file

    Drop an .mp3 file up to 500 MB on the converter.

  2. Convert to FLAC

    The MP3 audio is decoded and re-encoded as FLAC inside your browser.

  3. Download the FLAC

    Save a lossless-container file for workflows that require FLAC.

TipRequires Chrome or Edge — FLAC encoding is not exposed by Firefox or Safari.

Format details

Input formats
MP3
Output format
FLAC
Privacy
No upload · processed locally

Frequently asked questions

Does MP3 to FLAC improve quality?

No — FLAC cannot restore detail the MP3 compression already removed. It re-packages the same audio in a lossless container.

Why convert MP3 to FLAC at all?

Some archives, DJ software and submission forms accept only FLAC files. This tool satisfies that requirement without re-compressing the audio.

Will the file be bigger?

Yes — FLAC stores the decoded MP3 audio without lossy compression, so it is several times larger than the MP3.

Why does my browser not support this tool?

FLAC encoding uses the browser’s WebCodecs AudioEncoder, currently available in Chromium browsers — use Chrome or Edge.

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