Protect PDF is best for PDF security and immutability.
| Feature | Protect PDF | Flatten PDF |
|---|---|---|
| Password protection | ||
| Standard PDF encryption | ||
| Locks form fields into immutable text | ||
| Prevents unauthorized file opening | ||
| Removes interactive form scripts | ||
| Universal reader compatibility |
Use Protect PDF to encrypt your document with a password and set open/edit restrictions. Use Flatten PDF to permanently merge form fields and annotations into the page stream so they cannot be edited or filled again.
