Tool library
All tools
Focused tools for files, writing, numbers and code. Find what you need, then make it happen.
AES-256-GCM Text Encryption
Encrypt or decrypt text with a password using AES-256-GCM.
Batch File Checksum Generator
Generate SHA-1, SHA-256 or SHA-512 checksums for many files at once.
Encrypt / Decrypt File (AES-256)
Password-protect any file with AES-256-GCM, all in your browser.
HMAC Generator & Verifier
Create or verify HMAC-SHA256/384/512 signatures for a message.
JWT HMAC Signature Verifier
Verify that an HS256/HS384/HS512 JWT was signed with your secret.
Luhn Checksum Validator
Check card, IMEI and other numbers with the Luhn (mod 10) algorithm.
Passphrase Generator
Create memorable, random multi-word passphrases on your device.
Password Strength Checker
Estimate how strong a password is, privately in your browser.
PDF Unlock (Known Password)
Remove PDF encryption using a password you already know, without flattening the document.
PEM File Decoder
Identify and check every block in a PEM file (certificates, keys, CSRs).