Crop Video
Drag the box over the player to choose what stays in the frame. Lock the box to a common aspect ratio, or leave it free to remove black bars and edges.
- Nothing is uploaded
- Free, no sign-up, no watermark
- Works offline once loaded
Drop a video here
or choose a file, or paste
MP4, MOV, WEBM, MKV, AVI, M4V, 3GP, FLV, WMV and more
Processed on your device. Nothing is uploaded.
How to use Crop Video
- 1
Open the video
Drop the file on the drop zone. A crop box appears over the player.
- 2
Draw the frame
Drag the box and its corners over the area to keep. Under Box shape, lock it to 16:9, 9:16, 1:1 or 4:5, or leave it on Free.
- 3
Crop
Press Crop video. The progress bar shows the encode and can be cancelled.
- 4
Download
Check the new dimensions and size in the result, then Download.
Why use Aback Video for this
Visual crop box
Drag a rectangle on the actual picture instead of guessing pixel numbers.
Aspect ratio lock
Lock the box to common shapes for Reels, Shorts, feeds or YouTube.
Remove black bars
Use Free to cut away letterbox bars or a cluttered edge.
Local only
Cropping happens in your browser. The video is not uploaded.
Frequently asked questions
Does cropping lower the resolution?
Yes, by definition: only the pixels inside the box are kept. A 1920 x 1080 video cropped to its centre square becomes 1080 x 1080. The kept pixels are not scaled down.
How is this different from Resize for Reels and Shorts?
Crop lets you choose any area by hand. Resize for Reels and Shorts changes the shape automatically and can also fit the whole picture over a blurred background instead of cropping.
Why are the numbers rounded?
H.264 video needs even widths and heights, so the crop is rounded to the nearest even pixel.
Is my video uploaded?
No. The crop is done on your device with FFmpeg in WebAssembly.
Can I crop a moving subject?
The crop box is fixed for the whole video. For subjects that move across the frame, choose a box large enough to contain the movement.
Does it work on phones?
Yes. Drag the box with your finger; the corners are large enough to grab on a touch screen.