Convert MOV to MP4
Shot on iPhone? Your video is a MOV file — and half the internet can't play it. Drop it in here and get back an MP4 (H.264 + AAC) that plays everywhere, with the option to shrink it to an exact size in the same pass.
Drop your video here
or
MOV, M4V files — processed 100% on your device
Target size
Planned output:
ð¦ Large file: encoding several hundred MB in your browser can take a very long time, and phones may run out of memory. Desktop Chrome recommended.
Loading encoder…
🔒 Your video never leaves your device. No upload, no signup, no watermark.
Convert MOV to MP4 in 3 steps
Drop your MOV file in
Drag and drop any MOV or M4V file into the tool above. It never leaves your browser — no upload, no queue, no account.
Convert to MP4
The tool re-encodes to MP4 at a generous 500 MB quality budget — or pick an exact smaller size if you also need the file under a limit.
Download your MP4
The MP4 downloads straight to your device, with faststart enabled so it plays and uploads cleanly.
Why convert MOV to MP4?
MOV is Apple's QuickTime container. It is the default on iPhones, which is why so many videos arrive as .mov — but outside the Apple world, support is patchy: some Android phones, browsers, and upload forms refuse it outright.
MP4 with H.264 video and AAC audio is the closest thing to a universal format: it plays on every phone, every browser, and every social platform. Converting is usually not about quality — it is about compatibility.
VidSizer converts and, if you want, compresses in one pass: keep the 500 MB default budget for near-original quality, or set an exact target like 20 MB for Discord.
FAQ
Will converting MOV to MP4 lose quality?
Barely, at the default 500 MB budget: the video is re-encoded with a generous bitrate, so the result is visually near-identical to the original. If you also pick a small exact size, quality follows the same honest math as any compression — a long clip at a tiny target will look softer.
Is my video uploaded anywhere?
No. Everything runs in your browser. No upload, no account, no watermark.
Can I convert and shrink at the same time?
Yes — pick any exact target size instead of the 500 MB default and the output is both MP4 and guaranteed under your limit.