Compress Video
Reduce video file size while maintaining quality. Supports MP4, WebM, MOV and more. Powered by FFmpeg WebAssembly. 100% browser-based. Zero uploads.
Loading FFmpeg engine...
This may take a few seconds on first visit. The engine is cached for future use.
Failed to load FFmpeg engine.
Please refresh and try again. If the problem persists, make sure you are using a modern browser (Chrome, Edge, or Firefox).
Drop your video here
or click to browse files from your device
Supports MP4, WebM, MOV, AVI • Up to 500 MB
video.mp4
0 MB • 0:00 • 0x0
Compression Level
Low
Best quality, moderate size reduction. Ideal for archiving and high-quality sharing.
Medium
RecommendedGreat balance. Perfect for social media, email, and web sharing.
High
Maximum compression. Best for messaging apps and quick sharing.
Compressing Video...
0%Initializing FFmpeg...
Video compression may take a while depending on file size. Please keep this tab open.
Compression Complete
Original
0 MB
0%
smaller
Compressed
0 MB
How it works
Three simple steps — everything happens in your browser.
Upload your video
Drag and drop or click to select a video file. MP4, WebM, MOV, and AVI supported up to 500 MB.
Choose compression level
Pick Low, Medium, or High depending on your quality and size needs.
Download compressed video
See the size comparison and download your smaller video file instantly.
Why choose ToolKnit for Video Compression?
100% Private — No Server Uploads
Your video never leaves your device. All compression is done locally using FFmpeg WebAssembly. No data is sent to any server — ever.
Professional FFmpeg Engine
Powered by FFmpeg — the same engine used by YouTube, Netflix, and professional video editors — running right in your browser via WebAssembly.
Multiple Formats
Supports MP4, WebM, MOV, and AVI input. Output is always optimized MP4 (H.264) for maximum compatibility across all devices.
Up to 90% Smaller
Dramatically reduce video file size for email, messaging apps, social media, and cloud storage. Three compression levels to match your needs.
Pro Tips
- • Low compression keeps near-original quality — great for archiving important recordings.
- • Medium compression is perfect for sharing on social media and messaging apps.
- • High compression creates the smallest files — ideal for email attachments (under 25 MB).
- • Compression time depends on video length and your device's processing power. Keep the tab active.