Can this remove a password I do not know?
No. You must provide the correct password for files that require one.
Unlock PDF
Remove PDF encryption when you have the correct opening password.
PDFAPIStatic billingFree
Upload PDF files
qpdf handles structure-level PDF transformations. It does not OCR, extract text, or edit page content.
PDF only. Each file must be under 20MB.
Selected files
0No PDF selected yet.
Use only for PDFs you own or are authorized to process. The correct password is required.
About this tool
Remove PDF encryption when you have the correct opening password.
PDFAPIStatic billingPublic
Tool facts
Execution type: API
Credit cost: Free
Billing unit: 1 unlocked file
Supported locales: English, Chinese
Last updated: Apr 14, 2026
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Published articles and notes currently linked to this tool.
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Frequently asked questions
Is this intended for restricted documents?
Use it only for PDFs you own or have permission to process.
How to use this tool
1
Upload a protected PDF
Choose the encrypted PDF you are allowed to process.
2
Enter the password
Provide the correct opening password.
3
Download unlocked file
Run qpdf decrypt and download the output PDF.