Reduce upload size
Create a smaller copy for messaging, forms or websites with file-size limits.
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Drop a video here or choose a fileMP4, WebM or MOVAbout Compress Video
Compress Video reduces video file size by re-encoding the video with adjustable compression. Keep the original resolution when picture dimensions matter, or reduce resolution for a much smaller file.
Common use cases
Prepare web delivery
Lower bitrate or resolution for faster transfer and playback on the web.
Create lightweight previews
Make a compact derivative for review while keeping the original master separately.
How it works
1
The source video is decoded and its current resolution and duration are inspected.
2
Your quality and resolution choices determine the encoding settings for the new file.
3
The browser re-encodes the video into a smaller output and preserves supported audio where applicable.
Privacy & file handling
Video compression runs locally
The supported compression workflow processes the source video in the browser instead of uploading it to Zavilo for re-encoding.
Limitations and important notes
- Compression is lossy and can introduce blur, blocking, banding or motion artifacts.
- Already heavily compressed video may shrink very little without visible quality loss.
- Long or high-resolution clips can require substantial processing time and memory.
Compress vs resize video
| Feature | Primary goal | What changes |
|---|---|---|
| Compress Video | Smaller file size | Bitrate and optionally resolution |
| Resize Video | Different pixel dimensions | Resolution, with file size changing as a side effect |
How to use Compress Video
- 1
Choose an MP4, WebM or MOV video.
- 2
Choose light, recommended or strong compression.
- 3
Keep the original resolution or limit output to 1080p, 720p or 480p.
- 4
Compress the video.
- 5
Preview the result, compare its file size and download the MP4.
Tips for better results
- Recommended compression is a practical default for most videos.
- Lowering resolution usually reduces file size more than increasing compression alone.
- Use light compression when preserving fine detail matters most.
Frequently asked questions
Will video compression reduce quality?
Yes. Compression re-encodes the video, so stronger compression trades some visual detail for a smaller file.
How can I make the file much smaller?
Choose strong compression and a lower output resolution such as 720p or 480p.
What format is the compressed video?
The result is exported as MP4 for broad compatibility.