Practical focus
Use this page when you have FLAC audio and need a smaller listening or sharing copy while understanding the lossless trade-off.
Private browser-based audio compression
FLAC Compressor
Make portable MP3, AAC, or OGG copies from FLAC while keeping the original lossless file when it matters.
Your audio is compressed locally in your browser. Files are not uploaded to a server.
MP3 / WAV / M4A / AAC / OGG / FLAC inputMP3M4A / AACOGG
File-
Size-
Duration-
Your audio is compressed locally in your browser. Files are not uploaded to a server.
Compression mode
Advanced settings
Select an audio file to begin.
Compression result
Original size-
Compressed size-
Saved-
Output-
Bitrate-
Quick tips
- FLAC is already losslessly compressed.
- Large reductions usually mean converting to a lossy format.
- Keep the FLAC for archive or collection use.
How to use
- Choose MP3, AAC, or OGG output when you want a much smaller copy for phone listening, sharing, or upload.
- Keep the original FLAC if the file is part of a music archive or you may want to re-encode later.
- For casual music listening, try MP3 or AAC at 192 kbps; for very small copies, test 128 kbps.
- For voice FLAC, use MP3 mono at 64-96 kbps because stereo lossless storage is usually unnecessary.
Recommended settings
| FLAC goal | Suggested setting |
|---|---|
| Smaller listening copy | MP3, 192 kbps |
| Better quality portable copy | AAC, 192 kbps |
| Very small music file | MP3, 128 kbps |
| Archive copy | Keep original FLAC |
| Voice FLAC | MP3, mono, 64-96 kbps |
Supported formats
FLAC input is suited to music collections, lossless exports, and high-quality recordings.
Use MP3 or AAC output for portable copies, and keep FLAC separately for lossless storage.
Quality vs file size
FLAC is already compressed, but it is lossless. It is not the same as uncompressed WAV.
FLAC to MP3 or AAC can reduce file size a lot, but the result is no longer lossless. That trade-off is fine for listening copies, not ideal as the only archive.
Do not describe a small MP3 made from FLAC as lossless. It is a practical compressed copy.
Privacy and local processing
Compression runs in your browser, so the original audio is not uploaded to a server.
Large files can still be slow because decoding and encoding use your device memory and CPU.
Things to watch
- Do not delete the source FLAC if you care about a lossless collection.
- A much smaller FLAC-to-MP3 result is lossy even if it sounds good.
FAQ
Is FLAC already compressed?
Yes. FLAC is a lossless compression format, so it is smaller than WAV but still larger than MP3 or AAC.
Can I compress FLAC without losing quality?
Only to a limited degree with lossless methods. Large reductions usually require lossy output such as MP3 or AAC.
Should I convert FLAC to MP3?
Convert to MP3 for portable listening or sharing, but keep FLAC if you need a lossless master.
What bitrate should I use for FLAC to MP3?
192 kbps is a practical listening copy; 128 kbps is smaller but less safe for detailed music.
Should I delete the original FLAC after compression?
Not if the audio is important. Keep FLAC for archive quality and use MP3/AAC as a convenient copy.