WebM Compressor

Reduce WebM file size for web embedding, Discord uploads, and sharing. Set target size or quality level. Free, no watermarks.
OptionsAdvanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
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File Compression
File size (%)
1
80
100
If your file is 10 MB, then selecting 80 will produce a 8 MB file. If you make the output file size too small, then output video quality may suffer.
Auto Scale
[Smart Scaling Active] We will automatically adjust the image dimensions to maximize quality while hitting your target file size. Manual resolution settings are hidden to prevent pixelation.
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How to Compress WebM Files Online

  1. Upload Your WebM Files: Click "+ Add Files" to select WebM files from your computer, Google Drive, or Dropbox. Batch upload supported.
  2. Choose Compression Settings: Set a target file size percentage, specific size in MB, or adjust quality level. Optionally change resolution and frame rate for further reduction.
  3. Download Compressed Files: Click "Compress" and download your smaller WebM files.

Why Compress WebM Files?

Web Embedding

WebM is designed for web use, but large WebM files still slow down page loading. Compressing reduces bandwidth usage and improves playback start time for embedded HTML5 video.

Screen Recordings

Screen recording tools often produce large WebM files. A 5-minute screen recording can easily be 100-500MB. Compressing to 30-50% of original size makes them practical for sharing via email, Slack, or documentation.

Discord and Chat Uploads

Discord has an 8MB file limit (25MB with Nitro). Compressing WebM files lets you share video clips within these limits without converting to another format.

Storage Savings

If you have a library of WebM files from web downloads or screen recordings, compressing them can reclaim significant storage space.

Compression Tips

  • 50-70% quality gives excellent results for most WebM content — visually similar to the original at half the file size
  • Lower resolution if the original is higher than needed (1080p → 720p saves ~50%)
  • Reduce frame rate for screen recordings — 15fps looks fine for UI demos vs 30-60fps original

Frequently Asked Questions

How much can I reduce a WebM file?

Typically 30-70% reduction depending on the source content and quality settings. Screen recordings with static content compress more than fast-motion video.

Does compressing WebM reduce quality?

Yes — lowering quality settings removes video data. At moderate settings (50-70%), the difference is minimal for most content. Screen recordings and presentations compress especially well because they have large areas of static content.

Can I compress WebM to fit Discord's file limit?

Yes. Set a specific target file size (e.g., 8MB or 25MB) and XConvert will calculate the optimal quality to hit that target.

Can I compress multiple WebM files at once?

Yes. Upload multiple files and compress them all with the same settings.

Is it free?

Yes. Completely free with no watermarks, no sign-up required, and no file count limits.

Does it work on mobile?

Yes. Works in any modern browser on all devices — no app installation required.

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