Why is my iPhone video a .mov file?

MOV is Apple's QuickTime container, and it's the default for video recorded on an iPhone or iPad and for screen recordings on a Mac. It plays fine on Apple devices, but Windows, Android, and many websites expect MP4 instead — so the same file that works on your phone gets rejected elsewhere.

Will I lose quality converting MOV to MP4?

Almost none at sensible settings. MOV and MP4 often use the same underlying video codec (H.264), so re-encoding to MP4 stays near-identical to the original for normal viewing. The point is the container and compatibility, not throwing away picture quality.

Why does the first conversion take a moment to start?

The tool uses a video engine (ffmpeg, compiled to WebAssembly) that runs inside your browser. The first time you convert anything, it downloads that engine once — about 32 MB. After that it's cached, so later conversions start immediately.

Why is the conversion slower than my image conversions?

Video encoding is genuinely CPU-heavy — every frame has to be decoded and re-encoded. Short clips are quick; a long screen recording or a multi-minute 4K video will take a while, especially on an older or slower machine. It's working, not stuck.

Are my videos uploaded anywhere when I convert them?

No. The conversion runs entirely in your browser using WebAssembly. Your video never leaves your device, and FlipItFile has no servers that handle file content.

What's 'faststart' and why does it matter?

Faststart moves the file's index to the front so the video can begin playing before it's fully downloaded — important for web playback and upload forms. The converter applies it automatically so your MP4 streams properly everywhere.

iPhone Video Won't Play on Windows or Android? Convert MOV to MP4.

You AirDropped a video to yourself, sent a clip to someone on Windows, or grabbed a screen recording off your Mac — and it won't play. Maybe the recipient got a black screen. Maybe Android Photos just spun. Maybe an upload form flat-out rejected the file because it ended in .mov.

The fix is straightforward: convert the MOV to an MP4, in your browser, without uploading anything. Here's what's going on and how to do it.

What MOV is, in plain language

MOV is Apple's QuickTime container format. It's the default for video recorded on an iPhone or iPad, and for screen recordings made on a Mac. On Apple devices it plays perfectly, so you'd never know there was a problem — until the file lands somewhere that isn't Apple.

Windows handles MOV inconsistently. Android often won't play it at all. And a huge number of websites, upload forms, video editors, and messaging apps simply expect MP4 — the H.264/AAC combination that has become the universal video format every device and platform accepts. Your MOV is a perfectly valid video; it's just wrapped in a container the rest of the world doesn't reliably open.

You're not doing anything wrong. Apple picked MOV for its own ecosystem, and everything else standardized on MP4.

The fix: convert to MP4, in your browser

Convert MOV to MP4

Drag the file in, click download, done. Plays everywhere.

Open the MOV to MP4 converter →

The conversion runs locally in your browser using a video engine (ffmpeg, compiled to WebAssembly), so the video never leaves your device. There's no upload, no account, and nothing for anyone else to see. The tool re-encodes to MP4 with H.264/AAC and applies faststart automatically, so the result streams properly on the web and sails through upload forms.

Two honest notes. First, the very first conversion downloads that engine — about 32 MB — which happens once and is cached afterward, so later conversions start right away. Second, video encoding is CPU-heavy: a short clip is quick, but a long screen recording or a multi-minute 4K video will take a while, especially on a slower machine. It's working, not frozen.

Quality stays near-identical. MOV and MP4 frequently use the same H.264 video codec underneath, so at sensible settings you won't see a difference for normal viewing — you're changing the container, not degrading the picture.

Related conversions

Once your video's an MP4, the usual follow-ups are easy, and they all run the same way — in your browser, no upload:

Same drag-drop-download workflow. Same in-browser privacy.