Lock Your PDF with a Password
Encrypt PDFs with a user password to control who can open them, and set permissions to prevent editing or printing — all processed locally in your browser.
Free & full-featured · No uploads · Works offline
DOCUMENT SECURITY
Control exactly who can do what with your PDF
Set a document-open password, restrict printing, or prevent copying — all using standard PDF encryption.
Open password: Require recipients to enter a password before they can view the document at all.
Permission restrictions: Independently restrict printing, content copying, and annotation editing without requiring a password to open.
Industry-standard encryption: DraftPDF uses PDF-standard ARC4/AES encryption via PDFium, compatible with Adobe Reader and other major viewers.
Frequently Asked Questions
Everything you need to know before you get started.
How do I add a password to a PDF?
Step-by-step guide
Open your PDF in DraftPDF, then go to Document > Security settings. Enter your desired password, select any permission restrictions, and save the file. The exported PDF will require the password to open.
What encryption standard does DraftPDF use?
Encryption details
DraftPDF relies on the PDFium engine's built-in encryption support, which implements PDF-standard password security compatible with Adobe Acrobat and all compliant PDF viewers.
Is the encryption done on my device?
Privacy
Yes. All encryption happens locally in your browser using WebAssembly. Your document and your password are never sent to any server.
Can I remove a password from a PDF?
Removing protection
If you know the current password, you can open the encrypted document in DraftPDF and save it again without a password by clearing the security settings.
Ready to get started?
Open DraftPDF in your browser — no account, no install, no data ever leaves your device.
Free & full-featured · Works offline · No sign-up required
Related Tools
Merge PDFs
Open multiple PDF files and combine them into one document in seconds. Free, browser-based PDF merger — no uploads, no installs.
➕Insert Pages
Add pages from another PDF or insert blank pages anywhere in your document. Free, browser-based, no uploads required.
✂️Delete Pages
Remove unwanted pages from any PDF document instantly. Browser-based, no uploads, no installs.
🔖PDF Bookmarks
Create, edit, and organise PDF bookmarks (outlines) to make navigation effortless. Free, browser-based.