Video Compress
Compress video file size
Select video file
Compress a video online, free — reduce file size without uploading
This free online video compressor reduces your video's file size right inside your browser. Drop in a clip and the whole process runs on your device, so your footage is never uploaded to a server. There's no sign-up and no watermark.
Compression uses mediabunny and the WebCodecs API to re-encode with hardware acceleration for speed. You can pick a quality preset (low to very high), a target resolution (1080p, 720p, 480p or keep the original) and an output format (MP4 or WebM), so you can balance visual quality against file size for whatever you need.
It's handy for shrinking videos that are too big to email, post to social media or chat, or upload to a website. You see the before and after size and the reduction percentage on the spot, and it works in both desktop and mobile browsers.
Frequently asked questions
- Is my video uploaded anywhere?
- No. Compression runs entirely in your browser via the WebCodecs API, so your file is never sent to a server.
- How much smaller can the file get?
- It depends on the original bitrate and content, but lowering the quality, reducing the resolution or exporting to WebM can cut the size significantly. The reduction percentage is shown right after compressing.
- Will compressing reduce the quality?
- Compression re-encodes the video, so some quality loss is unavoidable, but the quality presets and resolution options let you balance how it looks against file size. Starting with the "High" preset is a good first try.
- What formats are supported?
- You can load common videos like MP4, WebM and MOV, and export the result as MP4 or WebM.
- Is it free and is there a size limit?
- It's completely free with no watermark or sign-up. There's no hard size cap, but longer, higher-resolution videos take more time and memory to process.
