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视频画面裁剪 - 在线裁剪视频画面自由选择区域 | VideosKit

免费在线视频画面裁剪工具。支持MP4、WebM、MOV格式,可自由拖拽选择裁剪区域,预设宽高比(16:9/9:16/4:3/1:1)。所有处理在浏览器本地完成。

Why Use This Tool

This page targets people who need to crop video online for a specific frame or aspect ratio. VideosKit makes it easy to crop MP4, WebM, and MOV videos directly in the browser, so users can adapt landscape footage for vertical formats, remove distracting edges, or create tighter compositions without uploading source media.

Typical searches here include crop video for Instagram, crop video to 9:16, or crop MP4 online. The content and tool settings are structured around those tasks, with presets for common aspect ratios and a workflow that keeps all processing on the device.

Best For

  • Converting landscape footage into vertical social clips
  • Cropping webcam recordings to remove empty margins or side panels
  • Preparing videos for Instagram Reels, TikTok, Shorts, and square feeds
  • Creating tighter subject framing for demos, tutorials, and talking-head videos

Format Notes

  • Aspect ratio presets help you match the destination platform before export.
  • Cropping changes the visible frame, so it is best used when composition matters more than preserving the full image.
  • Vertical 9:16 and square 1:1 crops are especially useful for mobile-first publishing.

Practical Tips

  • Pick the destination aspect ratio before you export to avoid re-editing later.
  • Keep the main subject centered when converting widescreen footage to vertical output.
  • Crop first, then trim or compress if you also need a shorter or smaller file.

如何裁剪视频画面

按平台比例或自定义区域裁剪视频画面。

Step 1

上传视频

打开需要裁剪的视频文件。

Step 2

选择裁剪区域

使用预设比例或自定义框选区域。

Step 3

预览效果

确认画面构图是否符合需求。

Step 4

导出结果

处理并下载裁剪后视频。

使用场景

裁剪视频为竖屏(9:16)

将横屏视频转为竖屏9:16,适合抖音、快手、小红书等短视频平台。使用9:16预设快速设置比例,拖动调整画面构图。

裁剪视频为横屏(16:9)

确保视频完美填充B站、YouTube播放器。裁剪到16:9去除黑边,优化宽屏观看体验。

裁剪视频为方形(1:1)

创建方形视频用于微信朋友圈、微博等社交平台。1:1预设居中画面,在信息流中获得最大视觉冲击力。

去除视频黑边

裁掉比例不匹配产生的上下或左右黑边。自由裁剪模式让你精确选择要保留的画面区域。

常见问题

视频画面裁剪 - 在线裁剪视频画面自由选择区域 | VideosKit