Related tools
MP4 Video Cropper
Reframe MP4 in your browser. Free, no upload. Client-side only.
MP4 (often H.264) is the default for sharing. Cropping MP4 removes outer pixels so you can target vertical video, remove letterboxing, or focus a subject. Our tool encodes locally; you choose output format when supported.
When to use MP4 Video Cropper vs other formats
Use this page when your workflow is MP4-first — phone clips, downloads, or exports that must stay MP4-friendly. WebM suits web-only pipelines; MOV fits some Apple editors. You can still export MP4, WebM, or MOV after cropping.
Compatibility
Cropped MP4 (H.264) plays on phones, desktops, and TVs. Match aspect ratio to each platform’s safe zones before publishing.
Quality considerations
Keep enough resolution inside the crop for your target screen. Very tight crops on 720p sources may look soft when fullscreen. Encoder-friendly even dimensions are handled automatically.
Example use cases
- Remove black bars from widescreen MP4 for vertical Reels.
- Tighten framing on talking-head MP4 for social thumbnails.
- Cut out UI or edges when re-exporting screen recordings.
- Produce square 1:1 MP4 for feed posts.
Best practices
- Leave headroom for captions if platforms overlay text.
- Preview on a phone-sized frame for mobile-first content.
- Export MP4 when unsure about playback targets.
- Keep a non-cropped master when possible.
Common use cases
- Social vertical — 9:16 crops from 16:9 masters.
- Thumbnails — Center subjects for consistent cover images.
- Ads — Match fixed aspect placements.
- Education — Focus slides or whiteboard regions.
- Archiving — Smaller pixel area can mean lighter files.
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