iPhone video compression
Compress an iPhone video without uploading it.
Use a browser-based compressor for short iPhone videos. For large 4K clips, a desktop browser may be more reliable.
iPhone video compressor
Try local MP4 compression for short phone clips.
Your selected video is processed in this browser tab. It is not uploaded to a conversion server.
Ready.
iPhone videos can be large
Modern iPhones can record high-resolution video that is too large to attach or share. This page gives phone users a clear local-first workflow.
Best settings and limits
Best first try
Use 720p for normal sharing. Use 480p when sending through chat or email.
When this may fail
Mobile Safari and mobile Chrome have tighter memory limits. If processing fails, try the same file on desktop.
Privacy boundary
The selected video file stays on your device while the tool creates the output.
Frequently asked questions
Can this compress 4K iPhone video?
Small 4K clips may work, but large files can exceed mobile browser memory.
Does my iPhone video upload?
No. The selected file is processed in the browser tab.
Why did the page reload or fail?
Mobile browsers may close tabs that use too much memory.