How Can I Remove Password Protection From my PDF File?

Hello,
I have a PDF file that is protected by a password. I tried almost all free online tools to unlock the password but they don't work. I know the password but online tools are showing the error: The uploaded file does not seem to be a valid PDF file.
Please let me know if there is any online tool or any software that can remove the password so I can share the file with others
Thanks
Steven

I know the password but online tools are showing the error: The uploaded file does not seem to be a valid PDF file.
Perhaps the file is not a .pdf file after all.
Anyway, .pdf files are generated by Adobe Acrobat, not by Windows. Checking the FAQs at the Adobe site is probably the best way to solve your problem. I would also run this test: Create my own .pdf file, apply a password, then remove the password.

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