Yes. PDFDocker is completely free to use with no hidden fees, no watermarks, and no file-size limits.

Do I need to create an account to edit a PDF?

No account is needed. Upload your PDF and start editing immediately — no email or sign-up required.

Are my files uploaded to a server?

No. All PDF processing happens entirely in your browser using JavaScript. Your files never leave your device.

What PDF tools does PDFDocker offer?

PDFDocker offers 18+ tools: PDF editor, Merge PDF, Split PDF, Compress PDF, PDF to Word, Word to PDF, PDF to JPG, JPG to PDF, Watermark PDF, Rotate PDF, Lock PDF, Unlock PDF, Sign PDF, Extract Text, Compare PDFs, Crop PDF, HTML to PDF, and PDF to HTML.

Which browsers does PDFDocker support?

PDFDocker works in all modern browsers including Chrome, Firefox, Safari, and Edge on both desktop and mobile.

All Tools › Lock PDF — Add Password

🔒

Lock PDF — Add Password

Protect your PDF with a password. Requires the password to open the document.

📂

Drop a file here or click to browse

Accepts: .pdf,application/pdf

Password to open document *

Allow printing Allow copying text

How to Lock PDF with Password

Three steps — no account, no software, no waiting.

Upload your PDF

Select the PDF file you want to password-protect.

Set a password

Enter a strong password to encrypt your PDF.

Download locked PDF

Download your password-protected PDF — share it securely.

Why use PDFDocker?

🔒

Strong encryption

PDFs are encrypted with industry-standard AES encryption.

🛡️

Access control

Only users with the password can open the protected PDF.

🔒

Private processing

Encryption happens in your browser — your PDF is never uploaded.

💸

Free to use

Password-protect PDFs for free with no account needed.

Frequently asked questions

How do I password-protect a PDF for free?

Upload your PDF to PDFDocker, enter a password, and download the encrypted PDF — no sign-up required.

What type of encryption is used?

PDFDocker uses AES encryption, the industry standard for PDF security.

Can I remove the password later?

Yes. Use PDFDocker's Unlock PDF tool with the correct password to remove it.

Is locking a PDF free?

Yes, completely free with no account required.

Related PDF Tools

🔓Unlock PDF 💧Add Watermark to PDF 🔗Merge PDF Files Online