How to check PDF is edited or not？

From the first day of using the PDF format, many people have heard that PDF is a relatively special file format in office documents. Although the pdf format is also a text format, it also has many differences from Word and Excel. Word and Excel can be edited directly on the computer, but PDF cannot. Therefore, PDF files are defined as a file format that cannot be modified.

But in fact, modifying the Pdf file is very simple. Only if you download a pdf editor, you can edit the content in the pdf file. Wps office is an all-in-one office software that includes word, excel, ppt and pdf editors. You can download WPS Office on your device so that you can always have a pdf editor working for you. So, what should you do if you want to check if a pdf file has been modified? Here are a few ways to tell you.

1. Annotation mode

In the pdf editor, you can add comments to the page content, or add notes. This method does not add or delete the original text, you can choose to highlight the sentence you want to modify, and then leave your modification comments in the comment box. In this way, when others open your pdf file, they can find out which places have been modified. If you don't want the page to look too complicated, you can click Hide Comments to hide all the modified parts so that the page looks the same as the original. When you want to see the changes, click Hide Comments again.

2. Paging open

If you have the original pdf file, and after sending it to others, other people have modified the text, but you don't know what he has changed, then you can open two pdf files at the same time to check. Of course, this manual inspection method is time-consuming. If the content of the pdf file is very short, you can use this method to quickly find the modified place. If the content is very long, a pdf file has dozens of pages of content, this method is too slow, and it is difficult to check all of them.

3. Document comparison

In WPS PDF editor, there is a document comparison function. Choose this function when your pdf document contains a lot of content and there is no way to check out what has been edited page by page. Click Document Comparison to upload the original pdf file and the modified pdf file. After waiting for the file to be automatically scanned, any differences will be highlighted. This way, you'll quickly know where edits have been made. It's really convenient.

Now, you know how to check if a pdf file has been edited. Then, go and download the WPS Office software. WPS Office supports pc and mobile phones, and can be used in windows, macos and other systems. It can be downloaded online from the official website and installed on your device with one click. Download WPS Office now and get a free membership. WPS office, make your work more efficient.