Security Tools Guides & Tutorials
Articles, guides and tutorials about security tools - password strength, hashing, checksums and crypto utilities. Featured reading: Password Entropy Calculator Online Free; URL Encoder and Decoder Online Free (Percent Encoding); Free Random Password Generator, Create Strong Secure Passwords; SHA-1 Hash Generator Online - Free.
Password Entropy Calculator Online Free
Password entropy measures, in bits, how unpredictable a password is based on its length and character variety - higher entropy means exponentially more
URL Encoder and Decoder Online Free (Percent Encoding)
Percent-encode or decode URLs and query strings safely - free URL encoder/decoder in your browser.
Free Random Password Generator, Create Strong Secure Passwords
Generate a strong, random password instantly, with full control over length and character types.
SHA-1 Hash Generator Online - Free
Generate and verifies SHA-1 hashes from text or files. Free in your browser, no account needed.
SHA-512 Checker: Free Online Guide (No Signup)
Generate SHA-512 hashes from text or files online for free. Fast, secure, works entirely in your browser. Fast results in your browser - free, no.
RSA Key Generator: what it does and how to use it
RSA is a widely-used public-key cryptography algorithm - you generate a linked key PAIR (public and private), where data encrypted with the public key can
How to use UUID Validator online, free
Check whether a string is a correctly formatted UUID/GUID, and if valid, identifies which version it is (v1, v4, etc.) based on its structure.
How to use Secure Passphrase Generator online, free
A passphrase is a password made of multiple random, unrelated words (like "correct-horse-battery-staple") rather than a jumble of characters - often easier
JWT Generator in your browser, no signup
Create and signs JSON Web Tokens (JWTs) using HS256/384/512 algorithms - useful for testing an API that expects a JWT, learning how JWT structure works, or
How Strong Is Your Password? Free Password Strength Checker
Type any password to see its strength score in real time, exactly which security criteria it passes or fails, and specific tips to make it stronger.
Random String Generator Online Free
Generate random strings of text based on rules you set - length, character set (letters, numbers, symbols), useful for things like generating API keys
PBKDF2 Generator: Free Online Guide (No Signup)
Derive and verify PBKDF2 keys online for free. Works entirely in your browser, useful for testing authentication systems.