How to lock a PDF file from editing?

1. Open your document in WPS PDF.

2. Click the Protect tab > Encrypt.

3. Check Set the password of editing and extracting, which protects this document from being edited and extracted. Then input the password, confirm the password and select the functions to encrypt as needed. Then click Confirm.

4. When someone need to edit it, he or she needs to input the password first.

To be office specialists, you could learn how to use WPS Office online in WPS Academy.