PDFStack Tool
Unlock PDF — Remove PDF Password Free
Remove password protection from a PDF you own and have the password for. PDFStack decrypts the PDF client-side using pdf-lib and exports a clean, unrestricted version — no subscription, no upload.
Open Unlock PDF →
No file uploads
No account required
Free to use
Private & secure
When do you need to unlock a PDF?
PDF passwords are often set by the original sender and forgotten, or applied automatically by a system. If you have the password and need to remove it for convenience — to merge the file, annotate it, or print without prompts — PDFStack handles it privately.
How to unlock a PDF
- 1Open Unlock PDF in PDFStack.
- 2Upload the password-protected PDF.
- 3Enter the password.
- 4Click Unlock PDF and download the unrestricted file.
All processing happens locally in your browser — no files are uploaded to any server.
Common Uses
Removing a password from a PDF you set the password on, unlocking a bank statement PDF for merging, decrypting a form received from a client.
Frequently Asked Questions
Do I need to know the password?
Yes. PDFStack decrypts PDFs using the password you provide — it cannot brute-force unknown passwords.
Does it remove print and copy restrictions too?
In many cases yes — pdf-lib re-saves the file without the restriction flags.
Is the process private?
Completely. Your PDF and password are never sent to any server.
What if it fails?
Some PDFs use 256-bit AES encryption that pdf-lib cannot yet decrypt. For those, use Acrobat with the correct password.