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.
16 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
Word-level text diff, or a visual redline.
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.
Unlock & Repair Office Files
Remove sheet protection, fix corrupt .xlsx/.docx.