How to use the MP4 to MOV tool
- Choose the video you want to convert.
- Leave "Fast mode" on when it appears: it changes the container without re-encoding, so it is instant and lossless. Otherwise pick a quality.
- Press Convert.
- Preview the result and download it.
About this tool
MP4 (MPEG-4 Part 14) usually holds H.264, HEVC, AV1 video with AAC, MP3 audio and is best known for sharing, social platforms, phones, TVs and email. Works when the video inside is H.264, AV1, or HEVC (HEVC depends on your device), with AAC or MP3 audio.
MOV is Apple's QuickTime container. Apple editing apps such as Final Cut Pro and iMovie, and many Mac video workflows, use it natively, and some upload forms and editors ask for .mov files specifically.
Because MP4 and MOV can hold the same codecs, this conversion is usually a rewrap: the video and audio streams are copied into a new MOV file without being re-encoded. It takes a moment even for large files and the quality is identical. If your file uses codecs that MOV cannot carry, the tool falls back to a normal re-encode.
Common reasons to convert MP4 to MOV
- Handing a file to an Apple editing workflow such as Final Cut Pro or iMovie that prefers .mov.
- Meeting an upload form, broadcaster or print house that specifies QuickTime MOV.
- Because H.264 and AAC fit in both containers, this is normally an instant rewrap with no quality change.
MP4 vs MOV at a glance
| MP4 | MOV | |
|---|---|---|
| What it is | MPEG-4 Part 14 | Apple's QuickTime file format |
| Typical video codecs | H.264, HEVC, AV1 | H.264, HEVC, ProRes |
| Typical audio codecs | AAC, MP3 | AAC, PCM |
| Best for | Sharing, social platforms, phones, TVs and email | IPhone footage and Apple editing tools |
| Plays on | Practically everywhere | macOS, iOS, QuickTime, most editors |
Why use ToolsCrow for this
- Instant when possible. Rewrap without re-encoding.
- Private. Files never leave your device.
- No watermark. Free, no account.
- Honest errors. Unsupported codecs are explained, not hidden.
Good to know
- Works when the video inside is H.264, AV1, or HEVC (HEVC depends on your device), with AAC or MP3 audio.
- Output is H.264 video with AAC audio (or Opus if your browser cannot encode AAC).
Frequently asked questions
Is my video uploaded to a server?
No. Everything runs inside your browser tab using your own device's video hardware. Your file is never sent to ToolsCrow or anyone else, which also means there is no waiting for an upload and it keeps working if your connection drops after the page has loaded.
Is it really free? Is there a watermark?
It is free with no sign-up, no watermark and no daily limits. The only limits are the ones your device sets: memory and processing power.
How large a video can I use?
Because the video is processed on your device, the limit is your device's memory rather than a server quota. Phone clips of several hundred MB are fine on most devices, and desktop computers usually handle 1 to 2 GB. Files over about 4 GB are not supported.
Which browsers work best?
Current Chrome, Edge and Safari (16.4 or newer, including iPhone and iPad) work best because they include the WebCodecs video engine. Recent Firefox versions work for many files. Older browsers fall back to a much slower real-time mode or may not work at all.
Will converting MP4 to MOV reduce quality?
Not in Fast mode: the streams are copied, so quality is identical. If a re-encode is needed, the High preset keeps it visually the same and caps the bitrate so the file does not grow.
What is the difference between MP4 and MOV?
MP4 is MPEG-4 Part 14, best for sharing, social platforms, phones, TVs and email. MOV is Apple's QuickTime file format, best for iPhone footage and Apple editing tools.
Why does my result have Opus audio instead of AAC?
Some browsers (for example Chrome on Linux) cannot encode AAC audio. When that happens the tool saves Opus audio instead and tells you. Opus plays in Chrome, Firefox, Edge, VLC and recent Safari; if you need AAC everywhere, run the tool in Chrome or Edge on Windows or macOS, or in Safari.
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