MOV → MP4
MOV → MP4. Convert media locally, preview and save. Your files stay on this device. Processing happens in your browser.
Enable JavaScript to use the tools. Files are processed in your browser.
How to convert MOV to MP4
Tap the box above and choose a MOV file.
Adjust the options if you want.
Wait while the converter loads (first time only) and runs; progress is shown below.
Download the MP4 file, or play it first to check it.
When you need this
A website, editor or social network rejects .mov files.
You want to play an iPhone video on a Windows PC or Android TV.
You need MP4 for a presentation or an online course platform.
About MOV
MOV is Apple's QuickTime container. iPhones record MOV files with H.264 or HEVC (H.265) video. MP4 was derived from the QuickTime format, so most MOV files can be converted to MP4 by copying the streams into the new container without re-encoding.
About MP4
MP4 (MPEG-4 Part 14) is the most common video container. It usually holds H.264 or H.265 video and AAC audio, and plays on nearly every phone, computer, TV and website.
How it works
This page runs FFmpeg, the open-source media toolkit, compiled to WebAssembly by the ffmpeg.wasm project. The single-threaded build (@ffmpeg/core 0.12.10) is loaded from this site's own program files under /vendor/ffmpeg/. Before use, the page checks each downloaded asset's byte size and SHA-256 hash against the packaged resource manifest; incomplete or mismatched assets are rejected. Your file is then copied into the converter's memory inside your browser tab, the video and audio streams are first copied into an MP4 container without re-encoding, which is fast and lossless; if the codecs are not allowed in MP4 (for example ProRes), the video is re-encoded to H.264 and the audio to AAC, which is much slower. The conversion process does not upload the selected media file.
Download size and limits
First load: the packaged FFmpeg resources total about 32.4 MB uncompressed (30.9 MiB), mainly WebAssembly. Transfer time depends on the connection and browser cache; a later visit may need to download them again.
Limits: 5 files, 250 MiB per input, 500 MiB per batch and 500 MiB per output. The input, intermediate data and result share browser memory, so a task can fail below these caps. Use a smaller file or batch if that happens.
The single-threaded converter can be slow, especially when re-encoding video. Copy-protected (DRM) media is unsupported.
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Frequently asked questions
Is this MOV to MP4 converter free?
Yes. It is free, requires no sign-up and adds no watermark. This tool accepts up to 5 files per batch; processing is also limited by browser memory, file size and supported formats.
Is my file uploaded?
The conversion code processes your selected file inside this browser without uploading it to a conversion server. Loading the site and converter still makes network requests; advertising or analytics traffic is described separately in Privacy.
Why does the first conversion take longer?
About 32.4 MB of uncompressed FFmpeg resources (30.9 MiB) must first be loaded and verified. Cached resources may speed up later use, but the browser can remove them and require another download.
What is the largest file I can convert?
250 MiB per input, with at most 5 files and 500 MiB combined; each output is capped at 500 MiB. Available memory may require smaller files, especially on phones. These caps do not guarantee successful conversion.
Will converting MOV to MP4 lose quality?
Usually not. Most MOV files are remuxed: the original video and audio are copied unchanged. Only unusual codecs are re-encoded, and the page tells you when that happens.