Compress MOV files
iPhone footage is beautiful and enormous. Shrink a MOV to a fraction of its size — on your own device, output ready for any app or platform.
Drop your video here
or
MP4, MOV, WebM, MKV, AVI and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
MOV is Apple's container, and Apple devices fill it generously: 4K at 60 frames per second, high-bitrate HEVC or even ProRes on newer iPhones. A one-minute clip can weigh 400 MB — glorious on the phone, hopeless to send, upload, or attach anywhere with a size limit.
ConvertUno reads MOV files directly and re-encodes them on your device into compact H.264 MP4 — the format every platform, Windows PC, and chat app plays natively, which MOV itself often is not. You choose the target size; the tool guarantees the result fits it and preserves as much of that iPhone sharpness as the budget allows.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Pick your target
Use the presets above — this page's defaults are tuned for compress mov — or type any size.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
Why are my iPhone videos so big?
Modern iPhones default to 4K 60fps recording with high-bitrate encoding, and Cinematic or ProRes modes multiply that further. The camera optimizes for editing headroom, not for sending — which is exactly what a deliberate re-encode fixes.
Will the compressed file still play on my iPhone and Mac?
Yes. The output MP4 (H.264 + AAC) plays natively on every Apple device — and unlike the original MOV, it also opens flawlessly on Windows, Android, and every web platform you might upload it to.
Does compression remove the audio from my MOV?
No — audio is preserved and re-encoded alongside the video. Only at extremely tight size targets will the tool drop audio to save the picture, and it clearly tells you when it does.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.