# Compress FLAC

> Compress Free Lossless Audio Codec (FLAC) files online for free. The compressor re-compresses at FLAC's maximum compression level; the audio stays bit-identical. Runs in your browser, so your files never leave your device.

URL: https://www.converterrr.com/compress-flac

- Compression: lossless, runs in the browser (nothing is uploaded).
- API: `POST /api/v1/jobs` with `"operation": "compress"` (paid plans).
- Format: [FLAC converter](https://www.converterrr.com/flac-converter), [Compress audio files](https://www.converterrr.com/compress-audio).

## What compression does to FLAC

Re-compresses at FLAC's maximum compression level; the audio stays bit-identical.

It's lossless, so there are no quality levels: every file comes back with identical contents, just packed more tightly.

Need it much smaller? A high-bitrate MP3 is well under half the size of the FLAC and sounds the same to most listeners. [Convert FLAC to MP3](https://www.converterrr.com/flac-to-mp3).

## How to compress FLAC

1. **Add your FLAC files.** Drag and drop FLAC files onto the compressor, paste them, or click to browse. You can add several at once.
2. **Keep the default.** FLAC compression is lossless, so there's nothing to tune: every file comes back with identical contents.
3. **Compress.** Click Compress. Your FLAC files are processed right in your browser, usually in seconds.
4. **Download.** Download each smaller FLAC, or everything at once as a ZIP.

## Good to know

- FLAC is lossless: it's re-encoded at the maximum compression level and the audio stays bit-identical.
- That keeps the savings modest. If you need a much smaller file and can accept lossy audio, convert FLAC to MP3 or M4A.
- Because FLAC compression is lossless, it can't be aimed at an exact size: the result depends entirely on what's in the file.
- FLAC compression runs entirely in your browser with WebAssembly, so nothing is uploaded and your files never leave your device.

## About the FLAC format

FLAC compresses audio without losing any quality, typically halving the size of a WAV file.

|  | FLAC |
| --- | --- |
| Full name | Free Lossless Audio Codec |
| Type | Audio |
| Extensions | .flac |
| MIME type | audio/flac |
| Best for | archiving CDs and high-fidelity music libraries |
| Properties | lossless, open standard |

## Compress other audio files

[Compress MP3](https://www.converterrr.com/compress-mp3), [Compress M4A](https://www.converterrr.com/compress-m4a), [Compress AAC](https://www.converterrr.com/compress-aac), [Compress OGG](https://www.converterrr.com/compress-ogg), [Compress Opus](https://www.converterrr.com/compress-opus)

## Compressing FLAC: frequently asked questions

### How do I compress a FLAC file?

Drop the FLAC onto the compressor above, and click Compress. Download the smaller FLAC when it's done; it usually takes a few seconds.

### Does compressing FLAC reduce quality?

No. FLAC compression is lossless. It re-compresses at FLAC's maximum compression level; the audio stays bit-identical.

### How much smaller will my FLAC get?

A few percent at most. FLACs saved at a low compression level shrink a little; ones already at maximum barely change. For real savings, convert FLAC to MP3 or M4A.

### Can I compress FLAC to a specific size?

No. Because FLAC compression is lossless, the result depends on the content and can't be dialled to an exact number. If you need a much smaller file, converting FLAC to MP3 gets further.

### Is it safe to compress FLAC files here?

Yes. FLAC files are compressed inside your browser with WebAssembly and never uploaded to a server.

### Is the FLAC compressor free?

Yes. Compression is free with no watermark and no sign-up, within the same daily allowance as conversions.

### Should I convert my FLAC instead?

Sometimes. A high-bitrate MP3 is well under half the size of the FLAC and sounds the same to most listeners. The FLAC to MP3 converter does that in one step.