PRIVATE BROWSER PROCESSING
Crop a video to the frame your next platform expects
Turn a landscape clip into a vertical frame, square crop, or cleaner widescreen without sending the source to a server. Choose the aspect ratio and the tool makes a centered crop.
Video cropper
Aspect ratio is often a delivery requirement, not a creative preference
This version uses a centered crop rather than an interactive pan-and-scan editor. That keeps it predictable. If the subject sits far off-center, use an editor where crop position can be moved or keyframed.
Privacy and limitations
Processing uses FFmpeg WebAssembly locally. The video is not uploaded by this tool. Closing or refreshing the page clears the working file. Speed depends on the browser, device memory, source codec, duration, and resolution, and tools that re-encode are not lossless.
Common questions
Which video formats are supported?
The FFmpeg core handles common formats such as MP4, MOV, WebM, MKV, AVI, MPEG, M4V, 3GP, TS and WMV, though the browser may not preview every format.
Is my video uploaded to DJAI?
No. The source file is read and processed in your browser on your device.
Why can the first run take longer?
The browser downloads an FFmpeg WebAssembly core of roughly 31 MB the first time processing is needed; caching can help later runs.
BUILD WITH DJAI
Want to build a tool like this one?
This tool runs entirely in the browser. Explore DJAI Academy’s practical building courses.