Video Compressor

How to Compress a Video Online

Upload an MP4, WebM or MOV video up to 60 seconds long and 100 MB in size. Choose High Quality, Balanced or Smaller File, and pick a lower resolution if you want an even smaller file. Select Compress Video, wait for the progress bar to finish, then compare the before and after sizes and download the result.

What Does Video Compression Do?

A video is a long run of images plus sound. Compression stores those images more efficiently by keeping fewer bits for each second of video. It also removes detail that is hard to notice, such as tiny changes between one frame and the next. The lower the bitrate, the smaller the file.

Does Compressing a Video Reduce Quality?

Usually a little. High Quality keeps most of the detail but saves less space. Smaller File saves the most space, but you may see softer edges or blocky areas in fast-moving scenes. Balanced sits in between and suits most everyday videos.

How Can I Make a Video File Smaller?

Choose a stronger compression level, or lower the resolution to 720p or 480p. A smaller frame needs far less data. How much you save depends on how the original was recorded, so results vary from video to video.

Why Is My Compressed Video Still Large?

Long videos, high resolutions, lots of motion and a high frame rate all need more data. If your video was already compressed efficiently, for example by a phone or a social media app, there may be little left to save. Sometimes re-encoding even makes the file bigger. The tool tells you when that happens and doesn't offer the larger file as a saving.

Are My Videos Uploaded?

No. Compression uses your browser's own video features, on your device. Your video isn't sent to our servers or to any other service.

Can I compress an MP4 video?

Yes. MP4 videos using H.264 are the most widely supported. WebM and MOV videos also work when your browser can read the codec inside them.

Will compression remove the audio?

No. AAC audio is copied across unchanged where possible. If your browser can't keep the audio, the tool warns you before compressing and only continues without it if you choose to.

Can I compress a video without changing its resolution?

Yes. Keep Original is the default, so only the bitrate is reduced.

Why did my compressed video become larger?

The original was already very efficiently compressed. Try Smaller File or a lower resolution.

Can I compress videos on my phone?

Yes, in modern mobile browsers. Phones have less memory and power than computers, so large or long videos are more reliable on a desktop browser.

Are my videos uploaded to a server?

No. Everything happens locally in your browser.