Unlock PDF
Remove PDF password protection using a password you know.
PDF TOOLS / SECURITY
Protect PDF
Require a password to open your PDF.
Uses AES-256 PDF encryption. Keep your password somewhere safe: this tool cannot recover a forgotten password.
Make room for a clearer document.Choose your PDF
Drag and drop, or browse your files.
PDF documents
How to use Protect PDF
- 01
Choose your files
Drag files into the workspace or browse your device. Try the example to explore the controls.
- 02
Set up your result
Enter and confirm an opening password, then create your protected PDF.
- 03
Review and download
Check the preview, create the result and download when you are ready. Multiple outputs can be saved together in a ZIP.
Good to know
Can I open a password-protected PDF?
Use Unlock PDF with a password you know before using the other tools. Only modify documents you own or have permission to use.
Will every PDF feature be preserved?
Review results before sharing. Forms, bookmarks, accessibility tags, attachments and existing digital signatures may not survive document transformations. Image-based compression and image exports flatten the page’s appearance.
What if processing fails?
Your browser’s available memory affects the documents it can process. Try fewer pages or a smaller file if a document cannot open or export. Keep your original file as a backup.
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