Crop a video
Free or 16:9, 9:16, 1:1, 4:5, 4:3 — move and resize the box over the frame and download only that area.
Your files never leave your device
How to crop the frame
- 1
Upload the video
Its first frame is shown.
- 2
Adjust the box
Move and resize it; pick an aspect ratio if you like.
- 3
Download the MP4
Only the selected area.
Why use this tool
Truly visual
You place the box over the real image, not blind numbers.
Social ratios
9:16 for Stories/TikTok, 1:1 for feeds, 16:9 for YouTube.
Works with MKV/AVI
The reference frame is extracted with ffmpeg even if your browser can't play the format.
Private
The video never leaves your device: ffmpeg runs in your browser.
Frequently asked questions
Can I reposition the crop area?
Yes: drag the box to move it and use the corner handle to resize (respecting the chosen ratio).
Does it also cut the duration?
No, this crops the frame (space). To cut duration, use Trim video.
Does it lose quality?
The kept area is re-encoded at high quality (CRF 21); the rest is discarded.
What is 9:16 for?
Turning horizontal video into vertical for Stories, Reels or TikTok — you pick which part of the frame survives.