# Compress Opus

> Compress Opus Audio (Opus) files online for free. The compressor re-encodes Opus at a lower bitrate. Runs in your browser, so your files never leave your device. Or set an exact target size.

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

- Compression: lossy, runs in the browser (nothing is uploaded).
- API: `POST /api/v1/jobs` with `"operation": "compress"` and an optional `compression_level` or `target_size` (paid plans).
- Format: [Opus converter](https://www.converterrr.com/opus-converter), [Compress audio files](https://www.converterrr.com/compress-audio).

## What compression does to Opus

Re-encodes Opus at a lower bitrate.

- **Light:** A high bitrate: indistinguishable from the original for most listeners.
- **Balanced (default):** The default: a moderate bitrate that's fine for everyday listening.
- **Strong:** Lowest bitrate: smallest file, best kept for speech and podcasts.

## How to compress Opus

1. **Add your Opus files.** Drag and drop Opus files onto the compressor, paste them, or click to browse. You can add several at once.
2. **Pick a level or a target.** Balanced is selected and suits most files. Choose Light to stay closer to the original or Strong for the smallest file, or set a target size or a percentage to reduce by.
3. **Compress.** Click Compress. Your Opus files are processed right in your browser, usually in seconds.
4. **Download.** Download each smaller Opus, or everything at once as a ZIP.

## Good to know

- Opus is the most efficient common audio codec, and the one many voice-chat and calling apps use, so it stays clear even at very low bitrates.
- Speech stays intelligible at bitrates as low as 16–24 kbps, which makes Opus ideal for voice notes under tight limits.
- Need to meet an upload limit? Set a target size (or a percentage to reduce by) in the compressor and the recording is compressed to fit.
- Opus compression runs entirely in your browser with WebAssembly, so nothing is uploaded and your files never leave your device.

## About the Opus format

Opus is a modern open codec that beats MP3 and AAC at every bitrate and excels at speech. WhatsApp voice notes use it.

|  | Opus |
| --- | --- |
| Full name | Opus Audio |
| Type | Audio |
| Extensions | .opus |
| MIME type | audio/opus |
| Best for | voice messages, VoIP and efficient music streaming |
| Properties | lossy compression, 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 FLAC](https://www.converterrr.com/compress-flac)

## Compressing Opus: frequently asked questions

### How do I compress an Opus file?

Drop the Opus onto the compressor above, keep Balanced or pick another level, and click Compress. Download the smaller Opus when it's done; it usually takes a few seconds.

### Does compressing Opus reduce quality?

A little, by design: Opus is a lossy format. Balanced is tuned to look the same for most uses; choose Light if you want to stay closer to the original.

### How much smaller will my Opus get?

Opus files are usually small already, so the savings are modest unless the original used a high bitrate.

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

Yes. Set a target size in the compressor, or a percentage to reduce by, and the file is compressed to land at or just under it.

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

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

### Is the Opus compressor free?

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