Compress FLAC

1. Upload your FLAC file (up to 50 MB).
2. Choose a compression level (5-8).
3. Click 'Compress FLAC' — takes 10-30 seconds.
4. Download the smaller FLAC.

FLAC is already lossless-compressed, but higher compression levels achieve 5-15% smaller files with zero quality loss — slower to encode, faster to decode, same audio.

FLAC files are already lossless-compressed, but different compression levels produce different sizes. Files encoded at level 0-2 are larger; higher levels (6-8) reduce size by 5-15% with zero quality loss. For archival, higher compression is essentially free savings.

The compressor decodes the FLAC audio losslessly and re-encodes it at a higher compression level. Every sample is preserved exactly — the output decompresses to byte-identical PCM. Only the encoding efficiency differs.

• Archiving FLAC with maximum compression.
• Reducing storage for a FLAC library.
• Optimizing FLAC for distribution.
• Standardizing FLAC files at level 6 or 8.
• Reducing storage costs for Hi-Res FLAC.
• Maximizing lossless savings for a music archive.
• Optimizing FLAC for streaming servers.

FLAC compression is always lossless — every sample is preserved exactly. Higher compression levels produce smaller files at the cost of encoding time. Playback is identical.

• 5-15% reduction only — FLAC is already compressed.
• Higher levels take longer to encode.
• Very small FLAC files may not benefit significantly.
• For larger reduction, use MP3 (lossy) instead.
• Multi-channel and Hi-Res FLAC supported.

• Output FLAC plays on every modern device and player.
• Works with VLC, Foobar2000, phones, audiophile software.
• Metadata preserved (Vorbis comments).
• Standard FLAC — no special software needed.
• Ideal for archival and audiophile listening.

• Level 6 is the standard — fast and effective.
• Level 8 achieves the smallest files but is slow.
• FLAC compression is always lossless — no quality trade-off.
• For much smaller files, use MP3 instead.
• Batch-compress up to 50 MB at once.

FLAC is barely smaller

FLAC is already compressed — savings are only 5-15%. Use MP3 for more significant reduction.

Compression is slow

Higher levels (7-8) take longer. Use level 5-6 for faster results.

Metadata is missing

Vorbis comments are preserved. If the source lacked metadata, the output will too.

• Xiph.Org — FLAC