Add Password

Lock a PDF with industry-standard AES-256 encryption.

About Add Password

Password Protect PDF encrypts the file with AES-256. Readers must enter the password to open the document. This is the same encryption used by Adobe Acrobat and supported by every modern PDF reader.

Use a strong password — 12+ characters mixing case, numbers, and symbols. Once encrypted, the password cannot be recovered if lost.

How it works

1
Upload the PDF.
2
Enter a strong password.
3
Download the encrypted PDF.

When to use it

Email confidential contracts safely.
Distribute sensitive HR documents to specific recipients.
Protect intellectual property in shared drafts.

Privacy

Files are processed by the Evixpdf engine in-house with the AGPL-free MIT stack — no third-party cloud upload. Sessions auto-purge after processing.

Frequently asked questions

Short answers to the questions people most often ask about Add Password. Read the one that matches your situation — they're written to be skimmed.

1What encryption standard is used?

AES-256 — the strongest standard supported by the PDF specification, matched by Adobe Acrobat and Foxit.

2Can the password be recovered if lost?

No. AES-256 is computationally infeasible to brute-force. Store the password securely.

Still stuck?

Browse our hand-written guides or ask us directly — we usually reply within a business day.

Read guides Contact support

Remove Password

Remove the password from a PDF you own.

Sign PDF (Test Cert)

Add a real PKCS#7 digital signature to any PDF.

Flatten PDF

Lock form fields and annotations into the page bitmap.

Ready when you are

Try Add Password now

No signup, no email required. Drag your file in and you're done in seconds.