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.

Opus→smaller Opus→MP3 JPG→smaller Opus→WAV PNG→smaller Opus→M4A MP4→smaller Opus→FLAC MP3→smaller Opus→AAC PDF→smaller Opus→OGG WebP→smaller Opus→WMA HEIC→smaller Opus→AIFF DOCX→smaller Opus→AMR GIF→smaller Opus→M4B SVG→smaller Opus→AC3 MOV→smaller Opus→MP2 AVIF→smaller Opus→WEBA Opus→OGA M4A→smaller Opus→MKA Opus→WV WebM→smaller Opus→AU Opus→TTA MKV→smaller PNG→JPG JPG→PNG XLSX→smaller PNG→WebP JPG→WebP EPUB→smaller WebP→PNG WebP→JPG AVI→smaller HEIC→PNG HEIC→JPG FLAC→smaller MP4→MP3 PNG→JPEG PPTX→smaller JPG→JPEG JPEG→PNG AAC→smaller JPEG→JPG PNG→PDF ZIP→smaller JPG→PDF PDF→PNG TIFF→smaller PDF→JPG HEIC→WebP OGG→smaller MP4→WebP PDF→DOCX 7Z→smaller DOCX→PDF JPEG→WebP ODT→smaller WebP→JPEG PNG→GIF TAR.GZ→smaller JPG→GIF GIF→PNG ODS→smaller GIF→JPG MP4→MOV ODP→smaller MOV→MP4 WebP→PDF TAR.BZ2→smaller HEIC→JPEG WebP→GIF TAR.XZ→smaller GIF→WebP HEIC→PDF MP3→WAV WAV→MP3 JPEG→PDF PDF→JPEG SVG→PNG SVG→JPG HEIC→GIF MOV→MP3 MP4→GIF GIF→MP4 JPEG→GIF GIF→JPEG PNG→AVIF JPG→AVIF AVIF→PNG AVIF→JPG MP3→M4A M4A→MP3 GIF→PDF SVG→PDF PNG→SVG JPG→SVG PDF→SVG SVG→WebP MOV→WebP MP4→WAV MP4→WebM WebM→MP4 WebP→AVIF AVIF→WebP WebP→SVG SVG→JPEG MP4→MKV MKV→MP4 HEIC→AVIF MP4→M4A JPEG→AVIF AVIF→JPEG JPEG→SVG MOV→GIF GIF→MOV WebM→MP3 AVIF→PDF MP3→FLAC FLAC→MP3 MP4→AVI AVI→MP4 MKV→MP3 GIF→AVIF AVIF→GIF SVG→GIF GIF→SVG WebM→WebP MOV→WAV XLSX→PDF CSV→PDF EPUB→PDF PDF→EPUB MOV→WebM WebM→MOV MKV→WebP PNG→ICO JPG→ICO ICO→PNG ICO→JPG MP3→AAC WAV→M4A AAC→MP3 M4A→WAV MP4→FLAC AVI→MP3 MOV→MKV MKV→MOV MOV→M4A DOCX→EPUB EPUB→DOCX

Compress Opus

Make Opus files smaller without visible quality loss. Free, and your files never leave your browser.

Runs in your browser
Same format, smaller file
Batch & ZIP download

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.

What compression does to Opus

LossyIn your browser

Re-encodes Opus at a lower bitrate.

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

Need an exact size?

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

Opus · Opus Audio

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

Type: Audio
Extension: .opus
MIME: audio/opus
Best for: voice messages, VoIP and efficient music streaming

Lossy compressionOpen standard

All Opus conversions →

Compress other audio files

All audio files →

Compressing Opus: frequently asked questions

Free, private and in your browser

Smaller Opus files, in seconds.

No sign-up, no watermark, no upload. Drop a file and get it back lighter.

Compress a file All compress tools

Most conversions never leave your device
Cloud files deleted automatically
No watermarks