PDF Password Protect & Unlock
Encrypt PDF files with strong passwords or remove passwords from protected documents. 100% private and processed locally in your browser.
Encrypting Document...
Applying cryptographic security dictionary in browser...
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Decrypting Document...
Rebuilding unencrypted PDF structure in memory...
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Lock Confidential PDFs
Add a secure open password to financial reports, pay slips, and client contracts before emailing them.
Remove Passwords
Permanently strip passwords from documents you own so you don't have to keep retyping them every time you open.
Restrict Print & Copy
Disable printing or text copying permissions to protect intellectual property and sensitive proprietary work.
100% In-Browser
Encryption keys and files never touch an external server or remote queue. All operations happen in local browser RAM.
⚡ How to Protect or Unlock a PDF
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1
Choose Mode
Select Protect PDF to add security, or Unlock PDF to remove a known password.
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2
Load Document
Drop your PDF into the upload zone or paste with Ctrl+V.
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Set Password or Enter Key
Enter your new secure password, or provide the existing password to decrypt.
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4
Download Result
Instantly save the encrypted document or clean unencrypted PDF directly to your device.
💡 Security & Privacy Tips
Protected PDFs use standard specifications recognised by Adobe Acrobat, Apple Preview, Google Chrome, Microsoft Edge, and mobile viewers.
You can allow recipients to open and read a document while disabling print commands or copy-pasting of text.
Never upload passwords or confidential financial papers to online converters where keys can be intercepted or logged.
Under the Hood: PDF Security Dictionaries & Cryptographic Architecture Show technical specifications ↓
Local Cryptographic Execution Engine
The BWTools security pipeline utilises PDF.js for high-DPI rasterisation combined with client-side jsPDF and pdf-lib cryptographic security dictionaries. When locking documents, user and owner passwords are cryptographically encoded into standard PDF 128-bit encryption containers along with granular permission flags. When unlocking, valid credentials permit local vector re-encoding into clean, unencrypted binary blobs without network transmission.
| Operation Mode | Encryption Standard | Permissions Control | Client Execution | Privacy Guarantee |
|---|---|---|---|---|
| Password Protect (Lock) | 128-bit Encryption | Print & Copy Restrictions | 100% In-Browser | Zero Server Uploads |
| Remove Password (Unlock) | Unencrypted Clean PDF | Full Unrestricted Access | 100% In-Browser | Zero Server Uploads |
Frequently Asked Questions
Can anyone open my password-protected PDF without the password?
No. Standard PDF encryption ensures that any PDF viewer (Adobe Acrobat, Apple Preview, Google Chrome) will prompt for the required password before rendering document contents.
What is the difference between open password and owner permissions?
The user password is required to open and view the PDF. The owner permissions dictionary governs whether viewers are allowed to print the document or copy text.
Are my passwords or documents sent over the internet?
Never. All encryption keys, decryption routines, and document rendering pipelines execute 100% inside your browser memory using local JavaScript. Nothing is sent across the network or logged externally.