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Crypto Security & Cryptography Tools
Secure your workspace, keys, and message exchanges. Generate BIP39 seed phrases, secure passwords, RSA keys, AES encryptions, TOTP tokens, and hash values. All cryptography runs strictly client-side using browser-native APIs.
AES Text Encryptor
Encrypt and decrypt messages locally using robust symmetric AES-256 algorithms with custom passphrase hashing.
RSA Key Pair Generator
Generate asymmetric public and private RSA key pairs (1024, 2048, or 4096-bit) using browser-native Web Crypto APIs.
Diffie-Hellman Simulation
Visualize and step through the mathematical key exchange handshake to understand how shared secrets are formed.
Hash Generator
Compute secure SHA-256, SHA-512, SHA-1, and MD5 hashes locally for text strings or files instantly.
HMAC Generator
Calculate Hash-based Message Authentication Codes using keys with SHA-256, SHA-512, or MD5 algorithms locally.
TOTP Generator
Compute 6-digit Time-based One-Time Password tokens locally using custom base32 secrets for 2FA authenticator checks.
Mnemonic Phrase Generator
Generate secure BIP39 compliant 12 or 24-word seed phrases using client-side cryptographic random numbers.
Password Generator
Generate secure, randomized passwords locally with options to exclude ambiguous characters and verify entropy scores.
Base64 Encoder & Decoder
Encode plain text and dragged files to Base64 formats, or decode Base64 strings back to text instantly.
QR Code Generator
Generate QR codes for text, URLs, and wallet addresses completely in-browser without network requests.
JSON Formatter & Validator
Validate raw JSON strings, beautify with customized tab spacings, or compact into minified payloads.
JWT Decoder
Decode and inspect header parameters and JSON Web Token (JWT) payload claim variables locally.
UUID Generator
Generate Version 4 UUIDs (GUIDs) instantly utilizing strong cryptographically secure random number sources.
Frequently Asked Questions
Where is my cryptographic input processed?
Everything is strictly processed locally. When you paste text to encrypt, generate keys, or compute hashes, all operations are done by JavaScript inside your own browser window. No secret text or key leaves your browser.
Are these keys secure enough for real crypto setups?
Yes. Generators (such as RSA, BIP39 mnemonic phrases, and Passwords) utilize `crypto.getRandomValues()`, which is a cryptographically secure pseudorandom number generator (CSPRNG) standard in modern web browsers.
Can I audit the cryptographic engine logic?
Yes. The core computation library is fully open-source. You can inspect the logic in our public repository, or open your browser's Developer Tools (F12) to verify that no network requests are sent during generation.