Add password protection to PDF files using browser-based encryption.
Privacy note
Many ToolifHub tools process files and text in your browser whenever possible. Avoid uploading sensitive documents to any online tool unless you trust the process — and clear downloads from shared devices when you are done.
Secure Processing
Free Forever
No Signup
Fast Processing
Secure PDFs with password encryption. Everything runs in your browser — your files never leave your device. No account or software installation required.
Ready to try Protect PDF?
Free · No signup · Works in your browser
Protect financial or personal records.
Secure files before sharing.
Explore more tools in our PDF Tools category, or browse all free online tools on ToolifHub.
Add Watermark
Add watermark to PDF online free with text or image stamps, position, rotation, opacity, and font size controls. Your PDF is processed privately in your browser.
PDF Editor
Edit PDFs online — add text overlays and highlights on any page. Preview with zoom, navigate pages, and download your annotated PDF.
Sign PDF
Sign PDFs online free — draw, upload, or type your signature, drag it into place on any page, and download the signed document instantly in your browser.
Unlock PDF
Remove password protection from PDFs you own with the correct password.
Sign PDF
Sign PDFs online free — draw, upload, or type your signature, drag it into place on any page, and download the signed document instantly in your browser.
Unlock PDF
Remove password protection from PDFs you own with the correct password.
Add Watermark
Add watermark to PDF online free with text or image stamps, position, rotation, opacity, and font size controls. Your PDF is processed privately in your browser.
PDF Editor
Edit PDFs online — add text overlays and highlights on any page. Preview with zoom, navigate pages, and download your annotated PDF.
Fill PDF Forms
Fill AcroForm PDF forms and download the completed document.
Organize PDF
Organize PDF pages online free — merge multiple files, split by page or range, extract selected pages, drag to rearrange, or delete unwanted pages. Everything runs in your browser.
Organize PDF
Organize PDF pages online free — merge multiple files, split by page or range, extract selected pages, drag to rearrange, or delete unwanted pages. Everything runs in your browser.
Fill PDF Forms
Fill AcroForm PDF forms and download the completed document.
Sign PDF
Sign PDFs online free — draw, upload, or type your signature, drag it into place on any page, and download the signed document instantly in your browser.
Unlock PDF
Remove password protection from PDFs you own with the correct password.
Add Watermark
Add watermark to PDF online free with text or image stamps, position, rotation, opacity, and font size controls. Your PDF is processed privately in your browser.
Add Page Numbers
Add page numbers to PDF headers or footers with left, center, or right alignment.
Drag & drop PDF file(s) here, or click to browse
Files are processed locally in your browser and never uploaded.