Convert MP3 to FLAC Free Online

About This Conversion

MP3 is the world's most popular lossy audio format, using psychoacoustic compression to dramatically reduce file sizes at the cost of some audio fidelity. FLAC (Free Lossless Audio Codec) is an open-source lossless compression format that reduces file sizes by roughly 50-60% compared to WAV while preserving every bit of audio data. An MP3 to FLAC converter decodes your MP3 files and re-encodes them using FLAC lossless compression. While the conversion cannot recover frequencies removed during MP3 encoding, the resulting FLAC file preserves the decoded audio perfectly with no further quality loss. FLAC is widely supported by modern media players, streaming devices, and music management software. It is the preferred archival format for audiophiles who want compact lossless storage. Our free MP3 to FLAC converter uses FFmpeg WebAssembly to process everything directly in your browser.

Why Use This Converter?

• Lossless archival — FLAC preserves the decoded MP3 audio without any additional compression loss, making it ideal for long-term storage.
• Smaller than WAV — FLAC files are typically 50-60% smaller than equivalent WAV files while remaining completely lossless.
• Open and free — FLAC is an open-source format with no licensing fees or patent restrictions, ensuring long-term accessibility.
• Metadata support — FLAC supports rich Vorbis comment tags for artist, album, track number, and other metadata fields.
• Wide compatibility — Most modern music players, phones, and streaming devices natively support FLAC playback.

How to Convert