How to Add a Watermark to a PDF (Free Online Tool)
Protect your documents by adding a custom text watermark to any PDF. Step-by-step guide with tips on opacity, positioning, and when watermarking makes sense.
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How to Blur Faces in Photos Online (Free Privacy Tool)
Protect privacy by blurring faces in photos before sharing. Free online tool — no software, no sign-up. Perfect for social media, real estate, and street photography.
3 min read
Digital Signatures on PDFs: What They Are and How They Work
Understand the difference between electronic signatures and digital signatures on PDFs. Learn how digital certificates, validation, and tampering detection work.
3 min read
PDF Security: Passwords, Encryption, and Permissions Explained
Understand PDF security options — password protection, encryption levels, and permission restrictions. Learn when to use each and how to protect sensitive documents.
3 min read