Reduce video file size by up to 70% while maintaining quality. Runs entirely in your browser - no uploads required.
Supports MP4, MOV, AVI, MKV, and WebM files
Large video files are a headache. Email attachments bounce back. Uploads take forever. Cloud storage fills up. A 5-minute screen recording can easily hit 500MB or more.
Our free video compressor shrinks your videos to a fraction of the original size while keeping them looking sharp.
Most online video compressors require you to upload your file to their servers. That means waiting for slow uploads, your video sitting on someone else's server, privacy concerns for sensitive content, and file size limits (usually 500MB or less).
Kommodo's compressor runs entirely in your browser. Your video never leaves your device. We use modern WebCodecs technology for hardware-accelerated encoding, which means faster compression without the privacy tradeoff.
Results depend on your source video and quality settings:
A 500MB video compressed at medium quality typically drops to around 200MB - small enough to email or upload quickly.
Your videos never leave your device. All compression happens locally in your browser.
Uses WebCodecs for fast, hardware-accelerated encoding when your browser supports it.
Choose from multiple quality presets and resolution options to get the perfect balance.
Process videos of any size. No arbitrary file limits or restrictions.
Click to browse or drag and drop your video file.
Select resolution and quality level based on your needs.
Click Compress and watch the progress bar.
Download your smaller file when complete.
Reduce file sizes for any use case
Drop your video file into the compressor above. Select your preferred quality level and resolution. Click Compress and wait for it to finish. Download your smaller file. No account needed, completely free.
Yes, to a degree. Our High quality preset reduces file size by 20-40% with minimal visible quality loss. For larger reductions, some quality trade-off is unavoidable, but our Medium preset works well for most uses.
Completely free with no catches. No watermarks added to your video, no file size limits, no time restrictions, and no account required. Compress as many videos as you need.
No. All compression happens directly in your browser using WebCodecs technology. Your files never leave your device. This ensures complete privacy for sensitive content like work presentations or personal videos.
We support MP4, MOV, AVI, MKV, and WebM input files. Output is always MP4 (H.264) for maximum compatibility across devices and platforms.
Typical reductions range from 20-70% depending on your quality settings. A 500MB video at medium quality often compresses to around 200MB. Results vary based on the source video content.
Speed depends on hardware acceleration. Chrome and Edge use your GPU for fast encoding. If your browser or device doesn't support WebCodecs hardware acceleration, it falls back to slower software encoding.
There's no file size limit. Since compression happens locally in your browser, you're only limited by your device's available memory. We've tested files over 2GB successfully.
Yes, the compressor works in mobile Chrome on Android. Compression will be slower than on desktop. iPhone users need to use a desktop browser due to limited WebCodecs support in Safari.
Use the resolution dropdown to select your target size (1080p, 720p, 480p, or 360p). Reducing resolution significantly decreases file size - going from 1080p to 720p can cut file size in half while remaining sharp on most screens.
Most email services limit attachments to 25MB. Upload your video, select Medium or Low quality, and choose a lower resolution (720p or 480p). This typically reduces a large video to under 25MB.
Pick the right app for you to start off now