If you know or remember a PDF’s password, there is only one way in which you can remove a PDF’s password which is using a Third-Party Application.
One of the best application to remove password from a PDF is,
Adobe Acrobat :
Adobe Acrobat can help you removing a PDF’s password.
- Steps to remove password from from Adobe Acrobat:
Step 1 – Open Adobe Acrobat

Step 2 – Drag and drop the PDF file into Acrobat and Enter the Password and Click OK


Step 3 – Click on Tools, which can be found on the right side of the app.

Step 5 – Click on Encrypt.

Step 4 – Click on Protection, which can be found at the bottom of the sidebar.

Step 6 – Click on Remove Security.

Step 7 – Click on OK.

Step 8 – Save the file.

- Another way and much easier way to Remove a PDF’s password is to use Online Third Party Websites.
Just upload the PDF and enter the password and the password-removed file will be downloaded automatically.
Some of the website that removes password from PDf’s are –
ilovepdf.com
smallpdf.com
sodapdf.com
(The above links are not affiliated. This article is written on the sole purpose of spreading information.)