MOV to MP4 Converter
Turn a QuickTime .mov — like a macOS screen recording or an iPhone video — into a universal .mp4 that plays everywhere. The fast path rewraps your video with zero quality loss, right in the browser. Free, no upload.
Fast keeps the original quality. Re-encode maximizes compatibility.
MOV vs MP4 — and why the fast path keeps full quality
MOV and MP4 are both containers — wrappers around a video and audio stream. A macOS screen recording or iPhone clip is almost always H.264 or HEVC video inside a MOV, and both of those codecs are perfectly valid inside an MP4 too.
So the fast path doesn't re-encode anything. It copies the exact same streams into an MP4 wrapper and adds faststart so the file plays instantly on the web. The result is byte-for-byte the same picture and sound, produced in seconds. Only unusual codecs (like ProRes) trigger the H.264 re-encode.
Working with the same recording elsewhere? Turn it into a shareable animated GIF, or shrink it with the video compressor.
MOV to MP4 FAQ
How do I convert a MOV to MP4 on a Mac?
Drop your .mov file above and click Convert to MP4. It runs entirely in your browser — no QuickTime export, no upload, no software to install. macOS screen recordings and iPhone videos are usually H.264 or HEVC inside a MOV, so the fast path just rewraps them into an MP4 with no quality loss.
Does converting MOV to MP4 lose quality?
Not with the fast path. MOV and MP4 are both containers, so when the video codec is already MP4-compatible we rewrap the exact same stream — identical quality, done in seconds. The re-encode option only kicks in when a file needs it (for example ProRes), and it uses high-quality H.264.
Why won't my MOV file play on Windows or in my editor?
QuickTime MOV files sometimes use codecs or a container that Windows Media Player, Premiere, or web browsers don't accept. MP4 with H.264 is the universal format that plays everywhere, which is why converting fixes most 'file won't open' problems.
Is there a file size limit?
Because everything runs in your browser's memory, keep files under about 600 MB. The fast remux path handles large recordings easily since it doesn't re-encode. Very large re-encodes will be slower.
Is it free and private?
Yes — free, no watermark, no account. Your file never leaves your device; the conversion runs entirely in your browser with hardware-accelerated WebCodecs.
Skip the conversion — record straight to MP4
SmoothCapture records your Mac screen and exports polished MP4s ready for YouTube, App Store previews, and social — with 3D device frames, smart zoom, and cursor effects baked in. Record and edit free; one-time purchase to export.