Security & Crypto
7 security and cryptography tools for developers. Debug and verify JWT tokens, generate MD5/SHA hashes, create cryptographically secure passwords, generate SSH key pairs, manage HD cryptocurrency wallets with multi-chain address derivation, encrypt and decrypt text with AES/DES/RC4, and calculate file checksums. All cryptographic operations run entirely in your browser — your data never leaves your device.
JWT
Encode, decode, and verify JSON Web Tokens (JWT) with HS256, RS256, ES256, PS256 and more algorithms. Free online JWT debugger — tokens never leave your browser.
Text Hashing
Generate MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3, Keccak, and RIPEMD-160 hashes with HMAC support. Free online hash calculator, 100% in your browser.
Password Generator
Generate cryptographically secure passwords with customizable length and characters, and check strength instantly with real-time analysis. Free, 100% in-browser.
SSH Key Generator
Generate SSH key pairs (RSA, Ed25519) in your browser with passphrase encryption, fingerprint display, and public key inspection. Keys never leave your device.
HD Wallet
Generate BIP39 mnemonic phrases and derive cryptocurrency addresses for EVM, Bitcoin, Solana, Tron, and Cosmos chains. Free online HD wallet tool — 100% client-side.
Text Encrypt/Decrypt
Encrypt and decrypt text using AES, DES, Triple DES, Rabbit, RC4, and RC4Drop with configurable block modes. Free online tool — text never leaves your browser.
File Checksum
Calculate MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3, and RIPEMD-160 checksums for any file with no size limit — fast, free, and 100% in your browser.