How to Compress Video Files Online Privately

1Upload Video File
Select your MP4, WebM, or MOV video.
2Choose Compression Setting
Select target file size (e.g. 10MB, 25MB) or choose resolution scale (1080p, 720p, 480p).
3Compress & Save
Download your compressed, lightweight video.

Target File Size Preset: One-click presets for Discord (8MB/25MB), WhatsApp (16MB), and Email (10MB).
Resolution Scale (1080p / 720p / 480p): Downscales video dimensions for smaller byte size.

Client-Side Video Transcoding
Compresses videos directly using your computer GPU/CPU via WebAssembly.
Discord & WhatsApp Presets
One-click target sizes for Discord (8MB/25MB/50MB), WhatsApp, and email attachments.
Resolution & Bitrate Controls
Scale video resolution and audio bitrate for optimal balance of size and clarity.
Complete Video Privacy
Your personal videos and screen recordings never leave your device.

The compressor loads a sandboxed WebAssembly video encoder that utilizes your local CPU multi-threading and GPU acceleration to transcode video bitrates directly in browser memory.

Because a video is thousands of images plus the work of describing how each one differs from the last. A one-minute clip at 30fps is 1,800 frames, and encoding examines motion across them rather than treating each in isolation — that inter-frame analysis is where the compression comes from and where the time goes. Running in a browser tab adds overhead compared with a native encoder, so expect a wait measured in minutes for anything long. Keeping the tab in the foreground helps; browsers throttle background tabs.

Resolution first if the video will be watched on a phone or embedded small, bitrate first if it must stay full size. The two failure modes look different and that is how you choose: too little bitrate at full resolution produces blocking and smearing during motion, which is very visible; a lower resolution at a healthy bitrate stays clean and simply has less detail. Dropping 4K to 1080p typically cuts the file by roughly three quarters and is invisible on any screen smaller than a television.

Most email providers cap attachments around 25 MB, and messaging apps are usually stricter and re-compress anything you send regardless. Under 20 MB is the safe target for email. The reliable route there is 720p or 1080p at a moderate bitrate rather than an aggressive bitrate at the original resolution — and for anything over a couple of minutes, a link to cloud storage beats fighting an attachment limit at all.

Video Compressor

Reduce video file size for Discord, WhatsApp, email, and social media.

Drop video files here

Supports MP4, MOV, MKV, WebM, AVI, 3GP, FLV, WMV

Max 2048MB per fileUp to 50 files

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