What is the difference between MP4 and MOV?

MP4 (MPEG-4 Part 14) is a widely compatible container format supported on virtually every device and platform. MOV is Apple's QuickTime container format, preferred by Final Cut Pro and many Apple apps. Both can contain the same H.264 or H.265 video — only the container wrapper differs.

Will converting MP4 to MOV reduce quality?

If you keep the same codec (H.264 or H.265) and just rewrap the container, quality is lossless — no re-encoding happens. Only if you change the codec or lower the bitrate will quality be affected. FFmpeg's -c copy flag and VLC's "stream copy" mode both rewrap without re-encoding.

Can I convert MOV back to MP4 the same way?

Yes. All the desktop tools listed here (FFmpeg, VLC, HandBrake, iMovie) work in both directions. For FFmpeg, simply swap the output filename extension.

Why does this tool not convert the file directly in the browser?

Video transcoding is computationally expensive and would be very slow in a browser tab for large files. The metadata reader runs entirely client-side and is instantaneous; the actual conversion is best handled by a dedicated desktop tool like FFmpeg.

Is my video file uploaded anywhere?

No. The metadata reader uses the browser's built-in File API and URL.createObjectURL(). Your file never leaves your computer — no upload, no server, no tracking.

Which conversion method is fastest?

FFmpeg with the -c copy flag is the fastest method because it rewraps the container without decoding or re-encoding any frames. Conversion of a 1 GB file typically takes under 5 seconds.

MP4 to MOV Converter

Name: MP4 to MOV Converter
Availability: InStock
Author: Nham Vu

Learn how to convert MP4 to MOV using free desktop tools, and inspect your video file metadata instantly in the browser.

Video File Inspector

Select any video file to read its metadata instantly — 100% client-side, nothing uploaded.

Click to choose a video file MP4, MOV, AVI, MKV, WebM…

FFmpeg (Fastest — lossless rewrap)

Free, cross-platform, no re-encoding

FFmpeg rewraps the container without touching the video or audio streams, so conversion is near-instant and lossless.

# Install on Mac via Homebrew
brew install ffmpeg

# Convert MP4 to MOV (lossless, stream copy)
ffmpeg -i input.mp4 -c copy output.mov

# Force H.264 re-encode if needed
ffmpeg -i input.mp4 -c:v libx264 -c:a aac output.mov

Install on Windows via winget install ffmpeg or download from ffmpeg.org.

VLC Media Player (GUI — no command line)

Free, Windows / Mac / Linux

Open VLC and go to Media → Convert / Save.
Click Add and select your MP4 file, then click Convert / Save.
In the Profile drop-down, choose Video — H.264 + MP3 (MP4), then click the wrench icon.
Switch to the Encapsulation tab and select MOV.
Save the profile, set the destination file with a .mov extension, and click Start.

HandBrake (GUI — advanced control)

Free, Windows / Mac / Linux

Open HandBrake and drag your MP4 file onto the window.
In the Summary tab, set Format to MKV — note: HandBrake does not natively output MOV. Use FFmpeg for native MOV output.
Alternatively, use HandBrake to re-encode to H.264, then wrap with FFmpeg: ffmpeg -i output.mkv -c copy final.mov.

HandBrake excels at quality re-encoding; FFmpeg is the better choice for pure container rewrapping to MOV.

iMovie (Mac only — simplest GUI)

Free with macOS

Open iMovie and create a new project.
Import your MP4 file by dragging it into the Media panel.
Add it to the timeline, then go to File → Share → File.
Set Format to Video and Audio and click Next to save.
iMovie exports as a .mov QuickTime file by default.

Summary