PDF Security
Protecting a document with a password, stripping one you no longer need, or adding your signature are all things worth doing carefully. These run client-side wherever possible, so your password and your file never touch our servers.
15 tools in this category.
Protect PDF
Encrypt a PDF with a password.
Unlock PDF
Remove password protection from a PDF you own.
Sign PDF
Draw your signature and place it on the page.
Request Signature
Email a PDF to someone else to sign — track the status.
Compare PDF
Spot the textual differences between two PDFs.
Redact PDF
Permanently black out sensitive text and images.
Remove PDF Metadata
Strip hidden author, title and other metadata.
Password Strength
Check how strong a password is.
File Checksum (SHA-256)
Get the SHA-256 hash of any file.
Sensitive-Data Detector
Find emails, cards, IDs & redact them.
Encrypt Text
Password-encrypt text with AES-256.
Decrypt Text
Decrypt AES-encrypted text with the password.
Duplicate File Finder
Find files with identical content.
Passphrase Generator
river-stone-cloud-42: strong & memorable.
PIN Generator
Random numeric PINs.