Password-Protect Your PDFs
Lock sensitive documents with bank-grade AES-256 encryption before you share them.
Contracts, tax returns, medical records, salary slips — some PDFs simply shouldn't be readable by anyone who stumbles across the file. PDFClaws's Encrypt PDF tool secures them with 256-bit AES encryption, the same standard used by banks.
Set an open password so only people you trust can view the document. Optionally add permission controls that block printing, copying text, or editing — even if someone has the file, they can only do what you allow.
Encryption is applied locally on your PC. Your document and your password are never transmitted anywhere, which makes PDFClaws safe for the most confidential files you own.
How it works
Encrypt PDF in 4 simple steps
- 1
Open PDFClaws and pick Encrypt PDF
Launch the app and click the Encrypt PDF tile.
- 2
Add the PDFs to protect
Drop in one or more files — you can secure an entire folder at once.
- 3
Set password and permissions
Enter a strong open password and optionally restrict printing, copying, or editing.
- 4
Click Encrypt
Protected copies are saved with AES-256 encryption applied.
Key benefits
Why use PDFClaws to encrypt pdf?
- 256-bit AES encryption — the industry standard
- Open passwords keep unauthorized readers out
- Restrict printing, copying, and editing
- Batch-protect multiple files with one password
- Passwords never leave your device
- Works on any PDF, any size
FAQ
Encrypt PDF FAQ
How strong is the encryption?
PDFClaws uses 256-bit AES, the strongest encryption standardized for PDF. A long, unique password makes brute-force attacks practically impossible.
What makes a good PDF password?
Use at least 12 characters mixing words, numbers, and symbols — a passphrase like "coffee-river-92-Storm" is both strong and memorable. Avoid names, birthdays, and single dictionary words.
Can I let people read the PDF but stop them from printing it?
Yes. Set an empty open password with permission restrictions: anyone can open the file, but printing, copying text, or editing stays locked behind your owner password.
What if I forget the password I set?
There is no backdoor — strong encryption means nobody, including us, can recover a forgotten password. Always store passwords in a password manager.
Learn more
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