Crypto & Security Tools
Free online cryptography and security tools — hashing, encryption, token and key generation, password strength, and more. Everything runs in your browser.
Crypto & Security Tools
Token generator — Generate random string with the chars you want, uppercase or lowercase letters,
Hash Text Generator (MD5/SHA) — Hash a text string using the function you need : MD5, SHA1, SHA256, SHA224, SHA5
Bcrypt — Hash and compare text string using bcrypt. Bcrypt is a password-hashing function
UUIDs generator — A Universally Unique Identifier (UUID) is a 128-bit number used to identify info
ULID Unique ID Generator — Generate ULIDs (Universally Unique Lexicographically Sortable Identifiers) onlin
Encrypt / decrypt text — Encrypt clear text and decrypt ciphertext using crypto algorithms like AES, Trip
BIP39 passphrase generator — Generate a BIP39 passphrase from an existing or random mnemonic, or get the mnem
HMAC Signature Generator — Computes a hash-based message authentication code (HMAC) using a secret key and
RSA key pair generator — Generate RSA public/private key pairs online for encryption, digital signatures,
Password strength analyser — Discover the strength of your password with this client-side-only password stren
PDF signature checker — Verify the signatures of a PDF file. A signed PDF file contains one or more sign
Crypto & Security Tools Guides
What Is a Random Token Generator and Why Do You Need One?
API Rate Limiting: Strategies, Algorithms, and Implementation
What Is Rate Limiting? Algorithms, Implementation, and Best Practices
How to Hash Text Online: MD5, SHA-1, SHA-256, and More
SHA-256 Hash: How It Works, How to Generate, and When to Use It
Hash Functions Explained: MD5 vs SHA-256 vs bcrypt — Which Should You Use?
What Is SHA-256? How the Hash Function Works and Where It Is Used
Bcrypt Password Hashing: The Complete Developer Guide
Password Hashing Explained: bcrypt, SHA-256, Argon2, and What to Actually Use
How to Store Passwords Securely: The 2025 Developer Checklist
UUID vs ULID: Which Unique ID Should You Use?
UUID vs ULID: Which Unique ID Should You Use?
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