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WebM.ai
Convert any video to WebM format directly in your browser
Drop your video file here or click to select. Multiple files supported.
Output Format:
WebM (Best compression, web-optimized)
MP4 (Universal compatibility)
GIF (Animated image)
MOV (Apple devices)
Supports input from MP4, MOV, WebM, and other video formats
Video Quality:
UltraFast (Lowest Quality)
Fast (Lower Quality)
Balanced
Slow (Higher Quality)
Remove Audio
Advanced Options
Two-pass encoding (better quality, slower)
Resolution Preset:
Keep Original
1080p (1920×1080) - Full HD
720p (1280×720) - HD
480p (854×480) - SD
360p (640×360) - Mobile
Lower resolution = smaller file size
Strip metadata
Optimize for web streaming
Performance Mode (use maximum resources)
Enable for faster processing on powerful machines
Video Editing Tools
✂️ Trim Video
Start (seconds):
End (seconds):
📐 Crop Video
📏 Custom Resolution (overrides preset)
Maintain aspect ratio
🔄 Rotate Video
Select rotation
90° Clockwise
180°
90° Counter-clockwise
⚡ Change Speed
0.25x
1x
4x
Convert!
⚡ Performance & Quality Settings:
Resolution
: Lower resolution = smaller file size (720p is ~50% of 1080p size)
Quality Presets:
UltraFast
: CRF 30 (MP4) / 35 (WebM) - 80% CPU, fastest speed
Fast
: CRF 23 (MP4) / 28 (WebM) - Good quality, fast
Balanced
: CRF 20 (MP4) / 25 (WebM) - Better quality, moderate speed
High
: CRF 18 (MP4) / 22 (WebM) - Best quality, slower
Performance Mode
: Uses 100% CPU for maximum speed
Custom Resolution
in Edit Tools overrides preset resolution
Lower CRF = higher quality but larger file size
Conversion Log
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