Secure PDF — Password & Encryption Online
Set password, encrypt or decrypt PDF free. Secure processing in your browser.
Confidential documents need additional protection before sharing. Set passwords for opening or editing, encrypt files using AES-256, remove metadata (author name, edit history) before publishing. All operations run locally in your browser — the file and password never leave your device.
9 tools — processed in your browser, nothing uploaded
Encrypt PDF
Protect a PDF file with a password
Open →Decrypt PDF
Remove password from a protected PDF file
Open →Sanitize PDF
Remove JavaScript, attachments, forms, links, and metadata from PDF
Open →Find & Redact
Find text in PDF and cover it with black rectangles permanently
Open →Flatten PDF
Convert form fields and annotations into static page content
Open →Remove Metadata
Remove author, title, dates and XMP metadata from PDF
Open →Change Permissions
Set PDF permissions: printing, copying, editing and more
Open →Digital Sign PDF
Add a digital signature with SHA-256 hash to verify PDF integrity
Open →Validate Signature
Check the presence and details of a digital signature in a PDF
Open →Frequently Asked Questions
What encryption standard is used to protect PDFs?
PDF encryption uses AES-256 — the same standard used in banking systems. The password is never transmitted: encryption runs locally in your browser.
Can I remove a password from a PDF I own?
Yes. Use the Decrypt PDF tool. You'll need to enter the current password to remove the protection.
What metadata does a PDF file contain?
PDFs typically contain the author name, creation date, software used, edit history, and other technical data. Use Remove Metadata to strip this information before sharing sensitive documents.
Can I restrict printing or copying text from a PDF?
Yes. The Change Permissions tool lets you restrict printing, text copying, and editing — without requiring a full password to open the document.
Is it safe to encrypt PDF online?
Yes. Encryption runs entirely in your browser — the file and password never leave your device. We have no access to your document or your password.
Other tool categories
Edit PDF Online Free
Edit PDFs online: add signatures, watermarks, images, annotations. Free, no installation needed.
Optimize & Repair PDF Online
Compress, repair and optimize PDF files free. Reduce file size without losing quality.
Organize PDF — Merge, Split, Rotate Online
Free PDF organization tools: merge, split, rotate, delete pages. All processed in your browser, nothing uploaded.