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Protecting PDFs

How to Remove a Password from a PDF (When You Know It)

A PDF that asks for a password every time you open it gets old fast — and some tools simply refuse to work on a locked file. If you know the password, removing it takes a few seconds. Here's how to make an unlocked copy, free, without uploading anything.

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When this is useful

An honest limit: this tool removes a password you already know. It doesn't guess, crack or bypass passwords — and it shouldn't. Only unlock files that you're entitled to open.

Step-by-step guide

  1. Open the Protect PDF tool and drop in the locked PDF.
  2. The tool detects that the file is password-protected and switches to "Remove the password" mode on its own.
  3. Enter the current password.
  4. Click "Remove Password & Download." You get a copy ending in -unlocked.pdf that opens without any prompt. Your original file isn't changed.

If the password is wrong, the tool tells you so instead of producing a broken file — just try again.

Then you can use the other tools

Once you have the unlocked copy, it works everywhere on PDFLantern: merge it with other files, compress it, delete pages, sign it or add page numbers. If you want it locked again afterwards, add a fresh password as the last step.

Frequently asked questions

Can you remove a password I've forgotten?

No. Without the password, a properly encrypted PDF can't be opened — that's the whole point of the encryption. Look in your password manager, any text file you saved with it, or ask whoever sent you the file.

Is my file or password uploaded?

No. The file is decrypted locally in your browser; neither it nor the password is sent anywhere.

Does the unlocked copy lose quality?

No. The content is the same — only the password requirement is gone. Text stays selectable and images keep their original quality.

Why do the other tools say my PDF can't be opened?

Because it's still locked. Unlock it here first, then use the unlocked copy in Merge, Compress, Split or any other tool.

Is it OK to remove the password from any PDF?

Only from files you have the right to open — your own documents, or files whose owner gave you the password and permission. Removing protection from someone else's file without permission isn't something this tool is for.

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