Know what a tool cannot promise
A visible signature is not automatically a regulated digital signature, and permission flags are not a substitute for encryption. Legal effect depends on the signing method and context.
Work with passwords, permissions, metadata, attachments, signatures, and hidden document structures from focused tools.
Lock your PDF by adding a password.
Unlock PDF by removing password protection.
Draw, type, or upload your signature.
Remove password protection and security restrictions associated with digitally signed PDF files.
Set or change user permissions on a PDF.
Remove metadata, annotations, scripts, and more.
Make form fields and annotations non-editable.
Optimize PDF for fast web viewing.
Strip hidden data from your PDF.
Manage layers
Encryption controls opening a file. Permission flags request limits in compatible readers. Metadata removal reduces hidden descriptive information. Signature validation checks certificate information.
A visible signature is not automatically a regulated digital signature, and permission flags are not a substitute for encryption. Legal effect depends on the signing method and context.
Editing, sanitizing, flattening, or rearranging a signed PDF can make an existing signature invalid. Keep the signed original and review the result in a trusted PDF viewer.
Keep the source file, open the output, and review its pages, text, images, links, and forms before sharing it.