Change a PDF password in one pass
Enter the current password, choose a new one, download the updated file. PDFSmith decrypts and re-encrypts inside your browser tab, so there is no moment where an unprotected copy sits on disk or on a server.
Drag & drop your PDF here
or click to browse
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Change Password
Enter your current and new password.
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This file doesn't have a password to change.
Password Updated!
Rotate a PDF password without an unprotected stop
The usual advice for changing a PDF password is to unlock the file, then lock it again with a new one. That works, but it leaves an unprotected copy sitting in your downloads folder between steps. PDFSmith decrypts and re-encrypts in a single pass, entirely in memory.
When this is useful
Monthly payslips shared with your accountant. Client reports that go out under a password you rotate every quarter. A shared family document whose password has been texted to one relative too many. In each case the file stays exactly as it is; only the lock changes.
How to change a PDF password
- Drop the protected PDF into the tool above.
- Enter the current password and the new one, and pick the encryption level.
- Download the updated file. The old password stops working immediately.
Good to know
- The current password is verified before anything changes, so a typo can't silently produce a broken file.
- You can upgrade at the same time: a file locked with old 40-bit or 128-bit encryption comes out with AES-256 if you choose it.
- Everything happens in your browser tab: no uploads, no logs, no unprotected copy on disk.
- Free and unlimited: rotate passwords as often as you like, no sign-up.
Starting from scratch? You can also password protect a PDF or remove a password completely.
Frequently asked questions
Do I need the old password to set a new one?
Yes. Changing the password means decrypting with the current one and re-encrypting with the new. PDFSmith asks for both up front and does the rest in a single step.
Why not just unlock and lock the file separately?
You can, but it doubles the work and produces an unprotected copy on your disk along the way. The unified flow decrypts and re-encrypts in memory, so no unencrypted copy is ever written.
Can I upgrade an old 40-bit password to AES-256?
Yes. Whatever strength the original file used, the new copy is written with the encryption level you pick: AES-128 or AES-256.
Is the file uploaded while changing the password?
No. Both passwords and the document stay in your browser tab. You could disconnect from the internet after the page loads and it would still work.
Try it with one of your own files
No account needed. Pick a tool below and your document stays in the browser tab from start to finish.
Prefer an app?
