Question 1

Is my video uploaded to a server?

Accepted Answer

No. The conversion runs entirely in your browser using your device's own video engine. Your file never leaves your computer, and there is nothing for us to store or delete.

Question 2

Does this work in Safari?

Accepted Answer

Encoding to MP4 needs video-encoder support, which is most reliable in Chrome and Edge today. The page will tell you if your browser can't do it.

Question 3

Why will nothing play my iPhone MOV?

Accepted Answer

iPhones record MOV, often with HEVC inside. Windows apps, older editors and many web players expect MP4 with H.264. This converts to exactly that.

Question 4

Does converting lose quality?

Accepted Answer

A generation, yes: the video is decoded and re-encoded. It is visually close for normal viewing, but do it once from the original rather than repeatedly.

Question 5

Will it still play on my iPhone afterwards?

Accepted Answer

Yes. MP4 with H.264 plays on every iPhone, Android, TV and browser worth naming. That is the point of converting.

Question 6

Is it free, and is there a watermark?

Accepted Answer

It is free with no watermark, no sign-up, and no export limit. There is nothing to buy here; the paid plan is on the Recast desktop app, which is a different product.

Question 7

How large a file can I convert?

Accepted Answer

The whole file is held in your device memory, so the ceiling depends on your machine. The upload panel shows the limit it worked out for your device, and it will tell you before it starts rather than failing halfway.

Question 8

Which browsers work?

Accepted Answer

Chrome, Edge, and other Chromium browsers have the broadest support. Firefox and Safari handle some operations. The page probes your browser on load and says plainly if a step is unsupported, so you never wait on a conversion that cannot run.

Question 9

Does it work on a phone?

Accepted Answer

It runs, but a phone has far less memory than a laptop, so keep the file small. For anything long, use a desktop browser.

Question 10

Does it work offline?

Accepted Answer

Once the page has loaded, yes. Nothing is fetched during the conversion, so it keeps working with the connection off.

Question 11

Why is my browser fan spinning?

Accepted Answer

Video work is CPU-heavy and it is happening on your machine rather than on a server. That is the trade for not uploading anything. Closing other tabs helps on a long file.

MOV to MP4 Converter

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