Drop a video file here to compress
MP4, MOV, AVI, MKV, WebM & more · up to 500 MB
Select one video file to compress and reduce its file size
Select one video file to compress and reduce its file size
How to Compress a Video Online
Add a video file from your device, or drag and drop it into the upload area to start compressing your video online.
Keep Auto optimize turned on for automatic video compression, or turn it off to choose Target file size and compress your video for platforms like Discord, LINE, Gmail, WhatsApp, or Slack.
Click Compress to reduce the video file size. Everything runs locally in your browser, so your video is never uploaded to a server. Download the compressed video when it is ready.
Why Use UploadLess
100% private
Compression runs in your browser via WebAssembly. Your file never leaves your device.
No sign-up needed
Open the page and start. No account, no watermark, no time limit.
Simple workflow
Compress one video at a time with a focused, simple workflow.
Flexible target size
Set an exact size for any platform — Gmail, Discord, Slack, Line, WhatsApp.
Video Compressor FAQ
Add your video file, keep Auto optimize turned on, and click Compress. UploadLess will automatically reduce the video file size in your browser without uploading it to a server.
Yes. UploadLess is a free online video compressor. You can compress video files directly in your browser without creating an account.
No. Video compression runs locally in your browser using WebAssembly technology. Your video file stays on your device and is never uploaded to our server.
UploadLess supports most video formats that can be processed in your browser, including MP4, MOV, AVI, MKV, WebM, M4V, 3GP, FLV, and more. The compressed output is saved as MP4 for better compatibility across devices and platforms.
Auto optimize is the default compression mode. It automatically chooses balanced video compression settings to reduce file size while keeping the video quality suitable for everyday use.
Yes. Turn off Auto optimize to use Target file size mode. You can enter a custom size or use quick tags for platforms like Discord, LINE, Gmail, WhatsApp, and Slack.
Usually, yes, but the goal is to make the video file smaller while keeping it watchable. Auto optimize is designed to balance file size and quality for most videos.
A browser-based video compressor is faster and more private for everyday files because the video does not need to be uploaded first. It is useful when you want to reduce video file size for email, chat apps, or sharing online.