Upload size helper
Compress video for upload without uploading it first.
When a form or website rejects a large file, create a smaller MP4 locally before trying the upload again.
Compress video for upload
Create a smaller MP4 for upload limits.
Your selected video is processed in this browser tab. It is not uploaded to a conversion server.
Ready.
Useful before upload forms
Many sites limit file size before accepting a video. This browser tool helps reduce the file before you send it anywhere else.
Best settings and limits
Best first try
Try Balanced at 720p first. If the upload limit is strict, use Smallest file and 480p.
When this may fail
Every upload site has different limits and may recompress your video again after upload.
Privacy boundary
The selected video file stays on your device while the tool creates the output.
Frequently asked questions
Can I compress before uploading to another site?
Yes. Download the smaller MP4 first, then upload that result wherever you need it.
Does this page upload the source video?
No. The source file is processed locally in the browser tab.
Can it guarantee an upload limit?
No. It can reduce size, but exact acceptance depends on the receiving site.