Version control for PDFs mostly doesn't exist — there's no built-in diff between "contract-v3.pdf" and "contract-v4-final.pdf." And when a document actually needs to stay private, most people don't know there's a real, standards-based way to lock it beyond just not sharing the link.
Finding what actually changed between two versions
PDF Compare does a text-level comparison between two PDFs and highlights the differences, which is a lot faster and more reliable than reading two long documents side by side looking for edits.
Putting a real password on a PDF
Password Protect PDF applies the same standard encryption used by professional PDF software — the kind virtually every PDF reader, including Adobe Acrobat and mobile apps, already knows how to prompt for and unlock. Nothing exotic or proprietary; if the person you send it to has any modern PDF reader, they can open it once they have the password.
Removing a password you're authorized to remove
If you already have the password for a protected PDF — your own document, or one you're cleared to unlock — re-typing it every single time you open the file gets old fast. Remove Password from PDF strips the protection once you provide the existing password, producing a normal, unprotected copy.
Comparison, encryption and decryption all run locally in your browser using the same open PDF security standard most software already implements — no file or password is ever sent to a server to process either operation.
