Private by design
Nothing is uploaded.Your video is compressed in your browser tab and never sent to a server. It stays on your device.
Compress video
Compress a video
Drop in a video and get a smaller file back. It is compressed in your browser - nothing is uploaded.
Big video files are awkward to email, upload, or share. Most "compress video" sites fix that by uploading your clip to their server. This one does it on your own device with ffmpeg compiled to WebAssembly, so the video never leaves your computer. Choose how much to shrink it, then download the result. Free, no signup, no watermark. It is the same private, local-first approach as our screen recorder.
Nothing is uploaded. The video is compressed on your device.
Choose a video or drop it here
MP4, WebM, MOV and more. Nothing is uploaded.
No install, no signup
Just a web page.No app, no extension, no account, and no watermark on the result. Works on locked-down computers too.
You choose
How much to shrink.Pick strong, balanced, or light compression to trade file size against quality for your clip.
How it works
Three steps, all in the browser. The first run downloads the ffmpeg engine (about 30 MB) once; after that it starts instantly.
- Choose your video. Drop a clip (MP4, WebM, MOV) onto the box, or click to pick one. It is read from your device, not uploaded.
- Pick how much to compress. Strong for the smallest file, balanced for a good middle ground, or light to keep quality high.
- Download the result. See how much smaller it is, preview it, and download. Nothing was sent anywhere.
When this helps
- A recording too big to email or to attach in a chat with a size cap.
- A clip you want to upload faster to a form, an LMS, or a ticket.
- A private video you would rather not send to a random compression website.
- Freeing up space by shrinking a large screen recording you want to keep.
Recording something new?
Our screen recorder lets you pick the quality and resolution up front, so you can capture a smaller file from the start - with system audio, microphone, and a webcam overlay, all on your device.
Frequently asked questions
Quick answers about compressing a video here.
Is my video uploaded to a server?
No. The compression runs entirely in your browser using ffmpeg compiled to WebAssembly. Your video is read from your device, compressed on your device, and saved back to your device. Nothing is uploaded, and there is no account.
How much smaller will my video get?
It depends on the clip and the setting you pick. Strong compression makes the smallest file, balanced is a good middle ground, and light keeps quality high with a more modest size cut. The result shows how much smaller it turned out.
Will compressing reduce the quality?
Some, yes - that is the trade-off for a smaller file. Balanced keeps it close to the original for most screen recordings and phone videos. If quality matters more than size, choose light; if size matters most, choose strong.
Do I need to install anything?
No. It is a normal web page with no app, no browser extension, and no admin rights. The first run downloads the ffmpeg engine, about 30 MB, to your browser cache, then it is ready immediately next time.
Is there a file size limit?
There is no hard limit, but because everything runs in your browser, very large videos can be slow or run out of memory. For big files a desktop tool may be more reliable. Most screen recordings and phone clips compress fine.
Does the result have a watermark?
No. There is no watermark, no signup, and no length cap added to the output. You get a clean MP4.