视频添加水印Add Watermark to Video
给视频叠加文字水印（四角或居中，支持中文），输出 MP4。Overlay a text watermark on a video (corner or centre, any language). Output is MP4.
可用Available视频与音频Video & Audio
视频压缩Video Compressor
缩小视频体积：可选画质和最大分辨率，输出 MP4（H.264）。Make a video smaller: choose quality and maximum resolution. Output is MP4 (H.264).
理念：Idea: 好视频不该卡在发不出去。A good video should not get stuck unsent.
解决：Solves: 压小视频体积，便于发送和上传Makes videos smaller to send or upload
适合：For: 视频太大发不出去的人Anyone whose video is too big to send
可用Available在浏览器中运行Runs in your browser
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在你的设备上本地处理。这里输入的内容不会上传。Processed locally on your device. Nothing you enter here is uploaded.
使用方法How to use
- 1选择一个视频。Choose a video.
- 2选择画质和最大分辨率。Pick the quality and the maximum resolution.
- 3点「开始压缩」，等进度走完后下载。Press Compress video, wait for the progress to finish, then download.
说明Good to know
- 视频在你的浏览器里重新编码，速度较慢，手机上尤其如此：电脑上 720p 视频大约每分钟需要 1–3 分钟。处理时请保持页面打开并留在前台。The video is re-encoded in your browser, which is slow, especially on phones: roughly 1–3 minutes per minute of 720p video on a computer. Keep the page open and in the foreground.
- 上限 150 MB，建议不超过 5 分钟。结果没变小时，可以选更低的画质或分辨率再试。Limit 150 MB; up to about 5 minutes is recommended. If the result is not smaller, try a lower quality or resolution.
- 第一次使用要下载约 10 MB 的处理组件（之后会缓存）。文件不会上传。The first use downloads a 10 MB processing engine (cached afterwards). Nothing is uploaded.
相关工具Related tools
视频提取音频Extract Audio from Video
把视频里的声音保存成 MP3、M4A 或 WAV。Save the soundtrack of a video as MP3, M4A or WAV.
可用Available视频与音频Video & Audio音视频合并Merge Audio and Video
把一段音频配到视频上，替换原来的声音，输出 MP4。Put an audio track onto a video, replacing its original sound. Output is MP4.
可用Available视频与音频Video & Audio视频删除音轨Remove Audio from Video
不重新编码，直接去掉视频的声音，速度快、画质无损。Remove the sound from a video without re-encoding, so it is fast and lossless.
可用Available视频与音频Video & Audio