PDF 纠偏（校正扫描歪斜页面）

使用方法

1. 1
   选择设置

   填写信息或选择您需要的选项。

2. 2
   查看结果

   更改任何内容时，预览会立即更新。

3. 3
   下载或保存

   将结果保存到您的设备。不会向服务器发送或保存任何内容。

About this tool

Add a scanned PDF whose pages are slightly tilted and the tool finds the angle of the text lines on each page and rotates the page to make it straight. The result is a new PDF made of the straightened pages. Everything runs on your device.

Why scans are crooked

A page that is fed at a small angle or placed unevenly on a flatbed comes out tilted. Straight text is easier to read, looks professional and gives better results when you run OCR afterwards.

How it works

Each page is drawn as a picture, the dark text pixels are analysed for the angle that makes the text lines most horizontal, and the page is rotated by that angle on a white background. Angles up to ten degrees are corrected.

Good to know

The output pages are pictures, so selectable text is not kept. Run OCR PDF on the result if you need searchable text. Pages with very little text, photos or handwriting may be left almost unchanged because there is no clear line direction.

Privacy

The PDF never leaves your browser.

获得最佳结果的提示

开始之前请花一点时间阅读选项，并先用一个小例子试用工具。一切都在您设备的浏览器中运行；您输入或添加的任何内容都不会被上传，关闭标签页会清除所有内容。如果看起来不对，请刷新页面重试，或使用本页的报告链接告诉我们出了什么问题。如果结果仍然看起来不对，请每次只更改一个值，看看哪个输入影响最大。如果您还会再用，请收藏此页。