Uwarp

Crops the frame (not timeline trim). Output is MP4. First run downloads FFmpeg (~25 MB) once. Need resize without cropping? Try /resize-video.

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Crop video online — video cropper

Crop video online free. Trim the frame of MP4/MOV/WebM to 16:9, 9:16, 1:1, and more — browser MP4 cropper, no server upload.

What is an online video cropper?

A video cropper (MP4 cropper) removes unwanted edges from a clip so you keep only the frame you want — for example square 1:1 or vertical 9:16. Use this crop video online tool to crop an MP4 in the browser with FFmpeg WebAssembly. It crops the picture area, not the timeline length.

Video cropper features

Crop video online and download a trimmed MP4 frame.

  • Crop video online free

    Upload MP4, MOV, or WebM and crop the visible frame in your browser.

  • MP4 cropper

    Crop an MP4 to social ratios like 16:9, 9:16, 1:1, 4:5, or 4:3.

  • Live crop preview

    See the crop region overlaid on your video before exporting.

  • Focus controls

    Shift focus X/Y or tighten crop scale when using a locked aspect.

  • No server upload

    Cropping runs locally with FFmpeg WebAssembly.

How to crop a video online

Crop a video clip online in three steps.

  1. Upload video

    Drop an MP4, MOV, or WebM file (up to 200 MB).

  2. Set aspect and focus

    Pick Free or a ratio, adjust inset/scale and focus, check the overlay.

  3. Crop and download

    Click Crop video, then save the MP4.

Great for

Common video-crop and MP4-cropper scenarios.

  • Social reframes

    Crop to 9:16 for Reels/TikTok-style posts or 1:1 for feed squares.

  • Remove distractions

    Cut UI chrome, empty margins, or off-subject edges from a take.

  • Landscape to portrait

    Keep the subject when converting wide footage to vertical.

  • Quick MP4 trims

    Crop an MP4 without opening a full desktop editor.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.