Crop Video
在浏览器中使用「Crop Video」完成代码、数据与二维码相关任务；输入内容和结果默认在设备上处理。
Local video processing: your selected video stays in this browser. A download appears only after the browser has recorded a real cropped video.
Checking local video recording support…
Up to 100 MB and 5 minutes. Your browser must be able to decode the source. Crop output is limited to 2.07 megapixels and 200 MB.
CROP PREVIEW
Choose a video to begin.
CROPPED VIDEO
Download cropped video使用步骤
如何使用
- Choose a supported local video up to 100 MB and wait for its dimensions and duration.
- Set the left, top, width, and height of the crop rectangle. The boundary overlay and canvas preview update as you edit.
- Create the cropped video, review the browser-recorded result, and download it with its actual MIME type and extension.
A real browser video recording
The tool draws the selected area of every video frame to a canvas and records that canvas with MediaRecorder. It never relabels a file: the result uses the MIME type returned by the recorder and only offers an export when the browser exposes a supported video encoder.
Defined limits for local memory
Input is limited to 100 MB and five minutes. The output rectangle is limited to 2,073,600 pixels and the collected recording to 200 MB; export stops at either limit. These bounds keep the source, canvas, and in-memory recording buffer within a practical browser workload. Actual size and quality depend on your browser encoder and the source content.
Private processing with browser limits
The selected video stays in this browser. The recorder normally creates WebM on Chromium and Firefox; Safari or managed browsers may expose a different supported format or none. Audio is routed through the browser audio graph when available, but browser media APIs ultimately control codec and audio compatibility.
常见问题
你可能还想知道
Will this create an MP4?
Only if your browser’s MediaRecorder reports an MP4 MIME type as supported. Many browsers export WebM instead. The page shows the actual result type and gives the download the matching extension.
Does cropping change the video duration?
No. This tool changes the visible pixel rectangle and records the source from the beginning to its end, subject to the five-minute and 200 MB limits.
Why is export unavailable in my browser?
The page needs Canvas capture, MediaRecorder, and a supported video MIME type. Try a current desktop browser; some mobile, managed, or privacy-restricted browsers do not provide a compatible encoder.
Does the source video leave my device?
No. The source, canvas frames, preview, and finished recording are handled locally in the browser and are discarded when you clear the tool or leave the page.