Why won't Windows or Android play my MOV file?

Modern Windows 10/11 can play many MOV files via the built-in HEVC extension, but it's unreliable. Android requires a third-party player. Converting to MP4 makes the video play natively everywhere.

Will I lose video quality converting MOV to MP4?

Usually no. If the MOV uses H.264 or HEVC video and AAC audio (which is typical for iPhone recordings), FFmpeg can re-wrap the streams without re-encoding — this is lossless.

Are my videos uploaded to your server?

No. FFmpeg.wasm runs in your browser. The video stays on your device the entire time.

How long does conversion take?

For container-only repackaging (the common case): a 1-minute video converts in 2–5 seconds. For files needing re-encoding, expect roughly 0.5–1× real-time.

What's the maximum video file size?

100MB per file. For larger videos, use a desktop tool like HandBrake.

Why does my iPhone export videos as MOV instead of MP4?

iPhone records in MOV by default because it's Apple's native container. Both MOV and MP4 can hold the same H.264/HEVC video — converting is mostly a relabeling operation.

Can I convert MOV to MP4 on iPhone or Android?

Yes — open FileConvertir.com in mobile Safari or Chrome, upload your video from the camera roll, and download the converted MP4. All processing happens on your phone.

MOV to MP4 Converter

Convert MOV to MP4 free online — no upload, 100% private. Fix QuickTime video compatibility on Windows, Android & social media. Browser-based, no signup.

FileConvertir — Free Online File Converter