--- title: "Video Compressor" description: "Compress MP4, MOV, WebM, and MKV video in your browser at a chosen bitrate preset. Nothing is uploaded, and there is no signup and no watermark." url: https://findutils.com/media/video-compressor/ category: media --- # Video Compressor Compress MP4, MOV, WebM, and MKV video in your browser at a chosen bitrate preset. Nothing is uploaded, and there is no signup and no watermark. **Use this tool:** [Video Compressor](https://findutils.com/media/video-compressor/) ## Programmatic access - Browser-only: this tool works on a file, the DOM, or a browser API and has no REST or MCP id. ## Why Use Our Video Compressor? Our video compressor is perfect for reducing file sizes for easier sharing and uploading. Whether you need to compress a video for email, social media, or just to save storage space, our browser-based tool makes it quick and easy. Unlike cloud-based services, your video never leaves your device. All compression happens locally: the tool re-encodes your video through WebCodecs, the browser's own media pipeline, driven by the Mediabunny library. Three presets set the target video bitrate at 8, 4, or 1.5 Mbps, and the result panel shows the original and compressed sizes side by side so you can see what a preset actually did to your file. ## Video Compression Tips - Start with Medium quality for most use cases. It delivers a good balance between file size and visual clarity. - Videos with lots of motion (sports, action) compress less efficiently than static scenes like presentations or screencasts. - For email attachments, target a final size under 25MB. Use the Low quality preset for large source files. - Close other browser tabs before compressing large files. Video processing uses significant memory and CPU. - If you only need a short segment, use a video trimmer first to cut unnecessary footage before compressing. ## Frequently Asked Questions ### How much can I compress my video? It depends on the source file. Each preset sets a target video bitrate of 8, 4, or 1.5 Mbps, so a clip already encoded below that bitrate barely shrinks, while a high-bitrate camera recording drops a lot. The tool shows the original and compressed sizes after every run, so you can compare presets on your own file instead of trusting a percentage. ### Will compression reduce video quality? Yes, some. Quality loss is inherent in video compression. The High quality preset minimizes visible degradation and is suitable for most purposes. The Medium preset provides a good balance, while Low prioritizes the smallest file size with more noticeable quality reduction. ### Are my videos uploaded to a server? No. The tool re-encodes your video in the browser with WebCodecs through the Mediabunny library, and the video file never leaves your device. The page loads ad and analytics scripts as most sites do, and they never see your file. ### What video formats are supported? The compressor accepts MP4, MOV, WebM, and MKV input files. MP4 and MOV inputs are saved as MP4, while WebM and MKV inputs are saved as WebM. The video codec inside that container is whichever encoder your browser provides. ### Is there a file size limit? Yes. The compressor accepts files up to 500 MB and rejects anything larger before reading it. Trim a longer recording first with the Video Trimmer, then compress the shorter clip. ### How long does compression take? Processing time depends on your device hardware, the clip length, and the preset. The encode runs on the page itself rather than in a background worker, so keep the tab in the foreground: browsers throttle background tabs and that slows it down. ### Can I compress videos on my phone? Yes. The compressor works in mobile browsers including Chrome and Safari on iOS and Android. The same 500 MB cap applies there, and phone processors are slower than desktops, so a long clip takes longer and can run out of memory on a device with less RAM. ### Does the video compressor require a signup? No. The compressor is free with no hidden limits: no signup, no watermark on your videos, no daily usage cap, and no premium tier. The site is supported by ads rather than subscriptions. ### What is the best format for compressed video? MP4 is the most widely compatible container across browsers, devices, and social media platforms. This compressor writes MP4 for MP4 and MOV inputs and WebM for WebM and MKV inputs, so start from an MP4 or MOV file when the result has to play everywhere. ### Can I compress multiple videos at once? No. The tool processes one video at a time for optimal performance and memory usage. After downloading your compressed file, click Reset to start compressing another video immediately. ## Related Tools - [Video Trimmer](https://findutils.com/media/video-trimmer/) - [Video Format Converter](https://findutils.com/media/video-format-converter/) - [Video Resizer](https://findutils.com/media/video-resizer/) - [Video to GIF Converter](https://findutils.com/media/video-to-gif/) - [Extract Audio from Video](https://findutils.com/media/video-to-audio/) - [Video Rotator](https://findutils.com/media/video-rotator/) - [Image Compressor](https://findutils.com/convert/image-compressor/) - [Video Thumbnail Generator](https://findutils.com/media/video-thumbnail-generator/)