Drop your video file here to reduce its size
MP4, MOV, AVI, MKV, WebM & more · Max 500 MB
Upload one video to reduce its file size quickly
Upload one video to reduce its file size quickly
How to Reduce Video Size Online
Add a video file from your device, or drag and drop it into the upload area to start reducing video size online.
Keep Auto optimize turned on to make the video smaller automatically, or turn it off to choose Target file size for email, Discord, LINE, Gmail, WhatsApp, Slack, and more.
Click Reduce Size to reduce the video file size. Everything runs locally in your browser, so your video is never uploaded to a server. Download the smaller video when it is ready.
Why Use UploadLess to Reduce Size
Private video size reduction
Reduce video file size directly in your browser. Your video stays on your device and is never uploaded to a server.
No sign-up or install
Make videos smaller online without creating an account, installing software, or adding a watermark.
Auto optimize by default
Let UploadLess automatically shrink video size with balanced settings for everyday sharing.
Fit email and chat limits
Turn off Auto optimize to choose a target file size or use quick tags for Discord, LINE, Gmail, WhatsApp, Slack, and more.
Reduce Video Size FAQ
Add your video, keep Auto optimize turned on, and click Reduce Size. UploadLess will make the video smaller directly in your browser without uploading it to a server.
Yes. UploadLess is a free online video size reducer. You can reduce video file size without creating an account, installing software, or adding a watermark.
Usually, yes. Making a video file smaller often involves some quality reduction, but Auto optimize is designed to balance smaller file size with clear, watchable video quality.
No. Video size reduction runs locally in your browser using WebAssembly technology. Your video stays on your device and is never uploaded to our server.
Yes. Turn off Auto optimize to use Target file size mode. You can enter a custom size or select a quick tag for platforms like Discord, LINE, Gmail, WhatsApp, and Slack.
Yes. You can reduce video size for Gmail, Discord, LINE, WhatsApp, Slack, and other platforms by choosing a target file size or using one of the quick size tags.
UploadLess supports most video formats that can be processed in your browser, including MP4, MOV, AVI, MKV, WebM, M4V, 3GP, FLV, and more. The smaller output file is saved as MP4 for better compatibility.
They are closely related. Compressing a video is the process, while reducing video size is the result. This page focuses on helping you make video files smaller for sharing, email, and storage.