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Fade In / Fade Out Video

Add a smooth fade-in and fade-out to a video — in your browser.

选择音频或视频文件

MP3、WAV、M4A、MP4、MOV、WebM —— 用 Whisper 在浏览器中转写

点击选择，或将文件拖到此处

如何 Fade In / Fade Out Video

  1. 1

    Add your video

    Drop in an MP4, MOV or WebM — it's read in your browser, never uploaded.

  2. 2

    Set the fades

    Choose how many seconds to fade in from black at the start and fade out to black at the end.

  3. 3

    Apply and download

    Click Apply fade and save the result.

Related PDF tools

Add Text to VideonewBurn custom titles or captions onto a video at a chosen time — in your browser.视频合并在浏览器中按你设定的顺序将多个视频片段合并为一个。视频裁剪在浏览器中把视频裁剪到你想要的部分。Reverse VideonewPlay a video — and its audio — backwards, in your browser.

Fade In / Fade Out Video — 常见问题

Is my video uploaded?+

No. The fade is applied entirely in your browser.

How long can the fades be?+

Up to 15 seconds each, or half the video's length if it's shorter than 30 seconds.

Is it a linear fade to black?+

Yes — a straight-line fade to and from black, the standard look for a clean open or close.

Which browsers work?+

Chrome, Edge and Safari 17+ — the fade is applied during a full re-encode, which needs WebCodecs.

你们会把我的文件上传到服务器吗？+

不会——这里的每个工具都完全在你的设备上处理文件，不会向服务器上传任何内容。唯一的例外是 AI 工具，它们会把提取的文本（而非文件本身）发送给 Claude 来完成工作。

有文件大小限制吗？+

我们没有人为设置限制，但由于处理过程在你的浏览器中进行，非常大的文件（超过 500MB 或 1000 页）会受到你设备内存的限制，而非我们的限制。