Video Compressor
Adjust resolution & bitrate to quickly shrink video file size. Use our free online calculator for fast, accurate results with no registration required. Simple, private, and ready to use in seconds.
Video Compressor
Drag or click to upload a video, then adjust resolution and bitrate to compress.
Lower value = better quality, larger file size
How to use Video Compressor
- 1Click "Upload video" and choose MP4 / MOV / WebM.
- 2Pick a target resolution and quality tier (e.g. 720p / high compression) and preview the estimated size.
- 3Click "Start compression". The local encoder produces a smaller video to download.
The key parameters of video compression
output size ≈ duration × resolution × bitrate; lowering resolution or bitrate shrinks size a lotVideo size is driven mainly by resolution, frame rate and bitrate. Dropping resolution (e.g. 1080p→720p) or bitrate slims the file with almost no perceived change — ideal for social upload, email, or phone storage.
Transcoding runs locally in your browser with no upload, protecting privacy and working offline.
Frequently asked questions
Will it look blurry?
A moderate bitrate drop is barely visible; only heavy compression causes blocking. Try a medium tier first.
Does it change length or content?
No. Only quality parameters are re-encoded; the footage and duration stay the same.
Is my video sent anywhere?
No. All transcoding is local; the file is never uploaded.