MOV to MP4 Converter
Drop a MOV, get an MP4 that works everywhere. Runs in your browser — no upload, no signup.
Drop your MOV file here
Converts to .mp4 — stays on your device
Why convert MOV to MP4?
- Fixing an iPhone screen recording that uploads fine to iMessage but gets rejected by LinkedIn, TikTok, or Instagram's desktop uploader.
- Converting QuickTime screen captures from a Mac so Windows coworkers can view them in Media Player or PowerPoint without installing codecs.
- Preparing a MOV export from Final Cut Pro for a YouTube upload — YouTube accepts MOV but MP4 uploads are more reliable and consistent.
- Handing footage to editors running Premiere Pro, DaVinci Resolve, or CapCut on Windows who prefer the universally-supported MP4 container.
- Uploading product demo videos shot on iPhone to Shopify, Etsy, or a WordPress site that only accepts MP4 in its media library.
- Attaching a short clip to an Outlook email where the recipient's client chokes on .mov but opens .mp4 without issue.
How our converter works
Your MOV is decoded by a WebAssembly build of ffmpeg running inside your browser, then re-encoded as MP4 with H.264 video and AAC audio — the universally-compatible combination. The output is playable on every modern platform without codec surprises. Conversion is CPU-intensive since every video frame gets re-encoded: expect roughly 1–3× the video's length on a modern laptop. Nothing is uploaded, which matters for NDA-bound client footage, unreleased marketing cuts, and product demos before launch.
MOV vs MP4 — what's the difference?
| Feature | MOV | MP4 |
|---|---|---|
| Origin | Apple's QuickTime container | MPEG-4 Part 14 — industry standard |
| Windows support | Requires QuickTime or codec pack | Native since Windows 7 |
| Social uploads | Often rejected or transcoded | Accepted by every platform |
| File size | Similar to MP4 if H.264 inside | Same codecs, same size |
| Best for | Final Cut Pro workflows, ProRes masters | Sharing, uploading, universal playback |
Frequently asked questions
Why does my MOV work on Mac but fail on Windows?
MOV is Apple's QuickTime container. Modern Windows handles most MOVs, but older apps, email clients, and social uploaders still rely on MP4 conventions. Converting to MP4 removes the friction without changing the underlying video quality meaningfully.
Will the video quality drop?
A small, usually invisible amount. Both MOV and MP4 typically contain H.264-encoded video, but converting requires decoding and re-encoding — one lossy pass. At the default quality setting (CRF 23) the difference is imperceptible for most viewers.
How long does conversion take?
Roughly 1–3× the video's length on a modern laptop (a 1-minute clip takes 1–3 minutes). This is slower than a desktop ffmpeg install because browser WebAssembly runs slightly slower than native code.
What's the maximum file size?
Around 500 MB before browser memory becomes a problem. For multi-gigabyte files, a desktop ffmpeg or HandBrake install is more reliable.
Are my videos uploaded anywhere?
No. The conversion runs entirely in your browser. Videos never leave your device — which is why this is safe for unreleased marketing content, client work under NDA, and confidential recordings.
Why does the first conversion take longer?
The ffmpeg WebAssembly module (about 30 MB) downloads and initializes on first use, then caches. Subsequent conversions in the same session start immediately.
About the MOV format
MOV is Apple's QuickTime File Format, introduced in 1991 and still the default output of Final Cut Pro, QuickTime Player, and iPhone screen recordings. Internally it's structurally similar to MP4 — MP4 itself was derived from MOV — which is why many MOV files can technically be renamed to .mp4 and still play. But 'technically' isn't enough for upload pipelines that sniff the container signature: LinkedIn, TikTok, many corporate video systems, and plenty of older tools look for strict MP4 structure and will reject or silently transcode MOV uploads. A proper container-level remux or re-encode to MP4 is the reliable fix.