Private video compressor
Compress video in your browser.
Reduce video file size locally with a simple MP4 output. The file stays on your device instead of being uploaded to a converter server.
Compress video
Best for lowering file size while keeping broad MP4 compatibility.
Your selected video is processed in this browser tab. It is not uploaded to a conversion server.
Ready.
What this compressor is for
This tool is best when a video is too large to send or upload but you still want a normal MP4 file. It lowers resolution and bitrate in the browser, then gives you a new download.
Local processing depends on your browser and device memory. For large 4K or long videos, use a desktop browser and close other heavy tabs.
Before you start
What happens to your file?
The selected video is processed in this browser tab. It is not uploaded to a conversion server.
Best first try
Use the default settings first, then adjust resolution, quality, or clip length if the result is too large.
When this may fail
Very large files or mobile browser memory limits can stop processing.
Frequently asked questions
Is my video uploaded?
No. The selected file is processed locally in the browser tab.
Why is compression slow?
Video encoding is CPU-heavy. Speed depends on your device, not a cloud server.
Will quality change?
Yes. Smaller files require some quality tradeoff. Choose higher quality for less compression.