签名清理

去掉签名照片中的白纸背景,得到透明 PNG。

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使用方法

  1. 1
    添加文件

    选择或拖放到这里。它保留在您的设备上。

  2. 2
    选择页面和选项

    选择您想要的页面并调整设置。

  3. 3
    转换并下载

    点击转换,检查结果后下载。不会向服务器发送任何内容。

About this tool

Signing a form or PDF needs a clean signature. Sign on white paper with a black or blue pen, take a photo with your phone and add it here. The paper colour, shadows and marks go away and only the signature stays, on a transparent background. Choose black, blue or the original colour. The result is a PNG you can use directly in the "Sign PDF" tool.

When to use it

Sign a white paper, photograph it and remove the paper to get a transparent PNG signature you can place on documents.

Tips

Sign with a dark pen on clean white paper in good light. Adjust the threshold until the strokes are clear.

Privacy

Everything runs in your browser, so your data is not uploaded or stored.

获得最佳结果的提示

请使用文件的副本进行操作,并在检查结果之前保留原件。在提交到门户网站、雇主或机构之前,请打开输出并查看每一页。如果有大小限制,请确认接收网站如何计算:有些把一千字节算作 1000 字节,有些算作 1024 字节。所有处理都在您设备上的浏览器标签页中进行,因此大文件取决于设备内存,在手机上可能需要更长时间。

要点

常见问题

What kind of photo works best?

Sign with a thick pen on white paper, keep the light even and take a straight photo from close.

What if a shadow stays?

Choose the "Strong" level. If the signature gets too faint, choose "Soft".

Is the background really transparent?

Yes, the result is a PNG with a transparent background.

Where can I use it?

Place it on PDFs with the Sign PDF or Edit PDF tool.

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