Step by step
- Open this page in Safari, Chrome, Edge, or Firefox on your Mac.
- Select your MOV, MP4, or WebM video file.
- Choose a quality level or a maximum size in MB, and optionally lower the resolution or remove sound.
- Click Compress video, check the preview, and download the smaller MP4.
At a glance
| Method | Best for | Trade-off |
|---|---|---|
| Browser tool on this page | Quick target size or quality without apps | Long 4K videos need high memory |
| QuickTime Player Export As | Built-in macOS resolution reduction | No exact MB target option |
| Lower resolution to 720p | Long screen recordings or large MOVs | Slightly softer detail |
Where to find it on your device
- QuickTime Player (macOS): File > Export As > 1080p / 720p / 480p
Related questions
How do I compress a QuickTime video on Mac?
Open the MOV file in the tool above, pick a quality level or target size, and press Compress video. You can also use QuickTime Player's File > Export As menu to save a smaller 720p or 480p copy.
Can I compress an MP4 video on MacBook without uploading it?
Yes, the tool runs locally in your Mac's browser using WebCodecs. Your video never leaves your MacBook.
Why did my 4K video fail to compress on Mac?
Long 4K videos require a lot of memory in the browser. Try lowering the resolution to 1080p or 720p before pressing Compress video.
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Open the full compress video →
Updated November 14, 2026.