Convert MOV to MP4

Turn a QuickTime MOV into MP4: an instant, lossless copy for H.264 clips, or a proper re-encode for iPhone HEVC.

Drop your files here

.mov, .qt · up to 300 MB

Choose files

AutomaticRemux (no re-encoding)Re-encode

More settings

HEVC videoQualityAudio bitrateOptimize for web playback (faststart)

How to Convert to MP4

1
Add your MOV file
Any QuickTime .mov or .qt clip, from an iPhone, a camera or a screen recording.
2
Keep Auto, or force it
Auto picks the right method by itself. Force Remux or Re-encode only if you know exactly which one you need.
3
Click Convert and download
An MP4 comes back in seconds for a compatible clip, or after a short re-encode for HEVC.

Remux or re-encode: the converter picks for you

Every MOV file wraps a video stream that was already encoded once, and MP4 can hold that same stream unchanged as long as it's H.264, the codec practically every non-Apple device already understands. In that case the converter moves the compressed data into a new container, called a remux: no frame is decoded, so a two-gigabyte file finishes in seconds and the picture stays pixel-for-pixel identical. When the stream inside is something MP4 can't safely carry everywhere, the converter falls back to a real re-encode, decoding every frame and writing it out again as H.264 with your browser's own video encoder.

Why iPhone video needs re-encoding, not just repackaging

Recent iPhones record in HEVC (H.265), a newer codec that compresses better than H.264 but isn't supported everywhere: Windows needs an extra codec pack, older Android phones and most versions of Telegram refuse to play it. Wrapping HEVC in an MP4 box is technically legal, but Auto mode re-encodes it to H.264 by default for compatibility. If you would rather keep the smaller HEVC file and only fix the container, for sharing to another Apple device say, force Remux and set the HEVC option to keep the codec as-is.

Quality and audio settings only matter for re-encoding

Remuxed video is untouched by definition, so the quality and audio-bitrate options only apply when a re-encode actually happens. Quality trades file size for sharpness in three steps, and audio is re-encoded to AAC at your chosen bitrate, the format every player expects, which replaces formats like the uncompressed PCM audio iPhones sometimes record alongside HEVC video.

Your MOV is converted on this device

A compatible clip is repackaged from MOV into MP4 in seconds without touching a frame, while HEVC from a recent iPhone is either re-encoded by your browser's own encoder or kept as HEVC, whichever you choose. Nothing about a personal clip reaches a server, there is no account, and closing the tab clears it.

Frequently asked questions

Does converting MOV to MP4 lose quality?

Only if a re-encode happens. A remux, the default for H.264 clips, copies the video stream byte for byte, so quality is identical. A re-encode, used mainly for HEVC, is a fresh compression pass and carries the same small, unavoidable generation loss any re-encode has.

What's the difference between remux and re-encode?

A remux moves the existing compressed video into a new container without touching a single pixel, so it is fast and lossless. A re-encode decodes every frame and compresses it again, which takes longer and changes the bits slightly, but is the only way to change the codec itself.

Why does my iPhone video get re-encoded instead of just copied?

Recent iPhones record in HEVC, which many players outside Apple's ecosystem cannot play: Windows without an extra codec pack, older Android phones, Telegram. Re-encoding to H.264 trades a little quality and time for video that opens everywhere.

What is HEVC, and why doesn't Windows open it?

HEVC (H.265) is a newer, more efficient video codec than H.264, but Windows doesn't ship a free decoder for it out of the box, Microsoft sells one separately, so an HEVC file often won't play until it's converted or the codec is installed.

Does the file get uploaded anywhere?

No. Both the remux and the re-encode happen entirely on your device, in your browser tab.

Why did the camera-motion metadata disappear?

iPhones store gyroscope and motion data in a track (mebx) that only Apple's own tools read, and standard MP4 has no place for it. It's dropped during conversion because no player outside Apple's ecosystem could use it anyway.

What's the maximum file size?

Up to 2 GB when the file only needs a remux, since no frame is decoded. Files that need a real re-encode, mainly HEVC, are capped lower because decoding and re-encoding a huge file in the browser takes real memory.

Does this work on iPhone and other mobile browsers?

Yes for remuxing H.264 clips in any modern mobile browser. Re-encoding HEVC needs a browser with a working hardware video encoder, which recent versions of Safari and Chrome provide.