Compress WEBM Online — Reduce File Size by Up to 30-60%
Compress WEBM files online instantly. Reduce .webm file size by 30-60% with no quality loss. Batch compress 100+ files. No signup, no watermarks.
Batch Settings
About WEBM Compression
WebM is Google's open media format, designed for web delivery using VP8, VP9, or AV1 codecs. WebM files are already web-optimised, but there is often room for further compression — especially for VP8-encoded content.
CocoConvert can re-encode WebM using VP9 for better compression than VP8, or adjust the bitrate to match your delivery requirements. Reducing resolution for mobile viewing provides additional savings.
WebM is the native format for browser-based video (used by YouTube internally) and offers excellent streaming performance. Compressing before upload reduces bandwidth costs and improves load times.
All processing uses FFmpeg's VP9 encoder on dedicated servers.
How to Compress WEBM
- 1
Upload your WEBM file
Drag and drop your .webm file into the upload area, or click to browse. Batch upload is supported.
- 2
Adjust compression settings
Use the quality slider to control the compression level. Lower values produce smaller files.
- 3
Click "Compress"
CocoConvert compresses your WEBM file using optimised video encoding.
- 4
Download the compressed WEBM
Your smaller .webm file is ready. Typical reduction: 30-60%.
Compression Tips
WEBM
.webm file • Video
VP9 codec gives better compression than VP8. Lower bitrate for web use.
| Extension | .webm |
| MIME Type | video/webm |
| Category | Video |
Frequently Asked Questions
What are the limits for WEBM compression?
CocoConvert lets you compress WEBM files with no signup required. You get 5 files per hour (up to 250 MB each) on the starter tier. Pro users get 100 files per hour and 5 GB per file.
How much can I reduce WEBM file size?
Typical WEBM compression reduces file size by 30-60%, depending on the original file and quality settings. Tip: CRF 31-35 for VP9, lower for higher quality.
Does compression affect WEBM quality?
CocoConvert gives you full control over the quality-size trade-off. Higher quality settings preserve more detail; lower settings produce smaller files. For lossless formats, compression is always bit-for-bit identical.
Is my WEBM file secure?
Absolutely. Files are processed on isolated servers in Germany, encrypted in transit via TLS, never analysed or shared, and permanently deleted within 24 hours.
Can I batch compress multiple WEBM files?
Yes! You can compress up to 5 files per hour on the starter tier. Pro users get 100 files, Business API users get 200. All files are processed in parallel.