VSThiran

PDF & Files

Password Protect or Unlock a PDF

Free to useNo sign-up requiredNo watermarkRuns in your browser

Two different jobs live on this page: adding a password to a PDF so it cannot be opened without one, and removing a password from a PDF when you already know it. Both run entirely in your browser using a real PDF encryption engine, not a rename trick or a print-to-PDF workaround.

Because this involves genuine encryption, this is the one PDF tool on the site that works on its own rather than inside the shared PDF workspace - an encrypted file cannot be previewed until its password is entered, which the workspace's live preview assumes is always possible.

How this tool works

  1. Choose Protect or Remove password

    Adding a password and taking one off are different operations - pick the one you need.

  2. Upload the PDF

    The file never leaves your device at any point.

  3. Enter the password

    Set a new one to protect the file, or enter the existing one to remove it.

  4. Download the result

    A protected or unlocked copy, ready to save or share.

How it works

This uses a real PDF encryption library (QPDF, compiled to run in the browser) to add or remove standard PDF password protection with 256-bit encryption - the same kind of protection Adobe Acrobat applies, not a superficial lock.

Removing a password requires knowing the existing password. This is not a password cracker or a bypass tool - it takes the password you already have and produces a copy of the file without it.

Everything runs locally in your browser. Nothing about the file or the password is sent anywhere.

What this is not

  • Not a way to open a PDF when you do not know its password. This tool needs the correct password to remove it, the same way any legitimate PDF password remover does.
  • Not the "print to PDF" trick some guides suggest - that can strip certain restrictions but does not remove genuine password encryption, and can produce a corrupted or lower-quality copy.
  • Not a substitute for a strong password manager if you are protecting something genuinely sensitive - a password only protects a file for as long as the password itself stays private.

Frequently asked questions

Is it safe to remove a password from a sensitive PDF here?

The file and the password are processed entirely in your browser using WebAssembly - nothing is uploaded to a server at any point, which matters more for a password-protected document (often a bank statement, contract or ID) than for most files.

Can this open a PDF if I do not know the password?

No. Removing a password requires entering the correct existing one. This tool cannot bypass or crack a password you do not have.

What encryption does the "Protect" option use?

256-bit AES encryption, the current standard also used by Adobe Acrobat and most other PDF software.

Will this work on any password-protected PDF?

It works on standard PDF password encryption. A very small number of PDFs use unusual or legacy encryption schemes that may not be supported.

Can I keep editing the PDF after removing its password?

Yes - once unlocked, you can continue straight into any other PDF tool on the site (merge, compress, sign and so on) without downloading and re-uploading it.

Guides for this tool