Secure PDF Tools
Best for users who need to control access, recover an unlocked working copy, remove sensitive content, or validate a signed document.
Category guide
How to choose the right secure pdf workflow
Security workflows should land users on the exact risk or permission problem they need to solve. Some users need to add a password, some need to remove a known password, some need to redact visible sensitive content, and others need privacy cleanup before sending a file outside their organization.
- Use Password Protect PDF to add passwords or access controls before sharing a sensitive PDF.
- Use Unlock PDF when the file has a known open password and needs a password-free working copy.
- Use Remove Restrictions when the file opens but actions like copying, editing, or printing are blocked.
- Use Find and Redact when the concern is sensitive visible content, not file permissions.
Related PDF tasks
Recommended entry pages
Unlock PDF
Unlock PDF files online by removing a known password. Create a password-free copy for easier editing, sharing, printing, or long-term archiving.
Password Protect PDF
Encrypt PDF files with a password and control who can open, print, or copy them. Add PDF protection online before sharing sensitive documents.
Find and Redact
Redact PDF text across all pages by searching names, account numbers, and patterns. Batch-remove sensitive information before sharing documents.
Timestamp PDF
Add RFC 3161 trusted timestamps to PDF documents. Prove document existence at a specific point in time without certificates.
Password Protect PDF
Encrypt PDF files with a password and control who can open, print, or copy them. Add PDF protection online before sharing sensitive documents.
Sanitize PDF
Sanitize PDF files by removing hidden data, scripts, attachments, comments, and embedded metadata. Prepare documents for safer external sharing.
Find and Redact
Redact PDF text across all pages by searching names, account numbers, and patterns. Batch-remove sensitive information before sharing documents.
Unlock PDF
Unlock PDF files online by removing a known password. Create a password-free copy for easier editing, sharing, printing, or long-term archiving.
Flatten PDF
Flatten PDF forms and annotations into static content. Finalize filled documents and preserve visible markup in a non-editable final copy.
Remove Metadata
Remove PDF metadata before sharing files. Strip author names, timestamps, producer info, and document properties without changing visible content.
Change Permissions
Change PDF permissions to control printing, copying, editing, and annotations. Set owner-password rules before sharing protected files.
Digital Signature
Add X.509 digital signatures to PDF documents. Sign PDFs with PFX, P12, or PEM certificates for legal validity.
Validate Signature
Verify digital signatures in PDF documents. Check certificate validity, signer information, and document integrity.
Certificate Encrypt & Sign
Secure PDFs using asymmetric public-key certificate encryption, paired with a 3D gold wax-seal imprint and PKCS#7 signature.
Sensitive Data Redaction
Automatically detect phone numbers, emails, and IDs, overlay opaque masks, and physically erase underlying text streams.
Signature Position Guide
Automatically locate signature fields in contracts, and inject interactive hovering guides and anchors for quick signing.