Video tool
Make a large video smaller directly in your browser. Your video stays on your device.
Ready on your device
Choose a video. It is not uploaded.
Start here
Use an MP4, MOV, WebM, or MKV file from your device.
Drop a video here
or
MP4, MOV, WebM, or MKV. Large files need more memory and processing time.
Selected file
The result may be slightly above or below the target. A smaller target usually means lower video quality.
FFmpeg runs locally
First use downloads about 32 MB of processing files. The page chooses a faster or lower-memory engine for this browser and video. Your selected video is not sent with that request.
The processing engine is coming to your browser. Your video is staying on your device.
Finished on your device
Check the result, then save it as an MP4.
The compressor runs in this browser. There is no file-upload step, and the video is not sent to us for processing.
A clear workflow
Choose a file, set a practical target, and let your browser do the work.
Select an MP4, MOV, WebM, or MKV file from your device. The file name, size, duration, and dimensions appear after your browser reads its metadata. Choosing the file does not upload it.
Enter a size smaller than the original file. The compressor uses the video duration to choose a suitable bitrate. A much smaller target saves more space, but fine detail and fast motion may look softer.
Your browser runs the processing engine locally and reports progress while it works. When the result is ready, compare the new size and save one clearly labeled MP4 file.
Start with a target around half to two-thirds of the original size when you want a smaller file without pushing quality too hard. Short videos can usually reach a small target more comfortably than long videos. The displayed target is approximate because video scenes vary: a still presentation, a talking head, and a fast sports clip do not compress in the same way.
The page needs a local FFmpeg processing engine before it can compress video. Those engine files download to your browser; your chosen video does not travel with them. Your browser may cache the engine for faster use next time. Processing can use substantial memory and battery, so keeping the tab open and connecting a laptop to power may help with long videos.
Straight answers
Useful details before a long compression job.
No. Your video is read and processed inside this browser. It is not uploaded to us for compression. Selecting a video only gives the current browser tab permission to read that file.
Video compression needs an FFmpeg processing engine. The engine downloads to your browser before it can work; your selected video is not sent with that request. Your browser may keep the engine files for faster use next time, depending on its cache and storage settings.
Not always. The target guides the bitrate calculation, but the finished MP4 can be slightly larger or smaller. Video complexity, audio, container overhead, and the original codec all affect the final size.
Your device is decoding and encoding the entire video. Duration, resolution, motion, browser speed, available memory, and battery settings all matter. Keeping this tab active and closing other heavy tabs can help.
The compressor creates an MP4 using H.264 video and AAC audio when audio is present. This is a practical combination for common browsers, messaging apps, presentations, and general file sharing.
No account or sign-in is required, and the tool is free to use.
