Audio

MP3 to FLAC Converter

Free, private, and instant — your files never leave your device.

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FLAC (Free Lossless Audio Codec) re-wraps your MP3 audio in a lossless container that compresses the decoded samples without discarding any further data. This is useful for archiving an existing MP3 collection in a metadata-rich format, consolidating libraries, or moving tracks into a system that stores everything as FLAC.

When you’d want this conversion

Unifying a music library under a single lossless container format (even when source material is MP3).
Embedding detailed Vorbis metadata — artist, album, year, track number — that FLAC handles natively.
Archiving MP3 files in a format that prevents accidental re-encoding losses.
Uploading to services like Bandcamp or Plex that prefer FLAC.

What to watch for

FLAC is a lossless codec, but it can only losslessly store what you give it. The decoded MP3 is stored exactly — no frequencies are restored. The quality ceiling remains the original MP3's.

FLAC files from MP3 sources will be larger than the MP3 (because FLAC stores uncompressed PCM, just with lossless compression on top) but smaller than a WAV of the same audio.

From.mp3

MP3

MPEG-1 Audio Layer III

Lossy compression
Size: small (3–10 MB / song)
Best for: music streaming, podcasts, broad device support

To.flac

FLAC

Free Lossless Audio Codec

Lossless
Size: medium (15–25 MB / song)
Best for: archival, audiophile listening, music libraries

More MP3 Conversions

MP3 to WAV Converter MP3 to OGG Converter MP3 to AAC Converter MP3 to M4A Converter

Convert Other Formats to FLAC

WAV to FLAC Converter M4A to FLAC Converter

How to Use

1
Drop your audio file onto the converter above, or click to browse.
2
Select your target format from the format buttons.
3
Click Convert — processing happens entirely in your browser.
4
Preview the result with the built-in audio player, then download.

Frequently Asked Questions

Does converting MP3 to FLAC improve quality?

No. FLAC losslessly stores the decoded MP3 audio — it cannot recover frequencies that MP3 discarded. The benefit is container properties: better metadata, lossless storage of what exists, and a format that won't be re-encoded accidentally.

How does file size compare to the original MP3?

A FLAC encoding of decoded MP3 audio is typically 3–5× larger than the MP3, but 30–50% smaller than WAV of the same audio. The FLAC compresses the PCM samples losslessly.

Which metadata tags does FLAC support?

FLAC uses Vorbis Comment tags, supporting artist, title, album, date, track number, genre, and arbitrary custom fields — more flexible than ID3 tags in MP3.

Convert any audio format

Drop any audio file into the converter — MP3, WAV, M4A, AAC, OGG, FLAC, or Opus.

Audio Converter