Video Cropper

What Video Cropper does

Video Cropper keeps a rectangular region of a video and saves it as a new MP4. You place a crop box over the playing clip, optionally lock an aspect ratio, and preview the cropped area before encoding.

It opens one clip at a time and never alters the original.

How to use it

1. Select Choose video and pick a file. The crop box appears centered on the playing stage.
2. Drag the box or its handles to frame the part you want, or type X, Y, Width, and Height in pixels.
3. Pick an Aspect ratio preset such as 9:16 for short-form posts when you want a locked shape.
4. Watch Live crop preview to confirm the kept region without encoding.
5. Select Crop video, wait for progress, then Download the -cropped.mp4 result.

Formats and limits

• Opens common video files the picker allows (MP4, MOV, WEBM, MKV, AVI, and other types the in-page FFmpeg build can decode).
• Output is always an H.264 MP4 with AAC audio. Crop width and height are snapped to even pixels for H.264.
• Only one video is processed at a time, and the full file sits in memory while FFmpeg runs.

Settings explained

Aspect ratio

Free, 1:1, 4:5, 9:16, 16:9, or 4:3. Locked presets keep the box shape while you resize.

X, Y, Width, Height

Exact crop in source pixels. Width and Height stay linked when an aspect preset is selected.

Privacy

Preview and crop stay in this tab. FFmpeg loads in the page the first time you crop. Nothing is uploaded.

FAQ

Why did the export size change by a pixel?

H.264 needs even width and height. The tool snaps the exported crop to even numbers while keeping it inside the frame.

Can I rotate while cropping?

Not in this tool. Use Video Rotate and Flip first when that tool is available, then crop.

Related tools

• Video Rotate and Flip - straighten the video before cropping.
• Video Cutter - trim the start and end in time.
• Video Resizer - scale to a new pixel size without cropping.
• GIF Cropper - crop an animated GIF.
• Image Cropper - crop a still photo.