Crypto & Security Tools

Generate RSA/ECDSA key pairs, encrypt files with AES, calculate hashes, and perform cryptographic operations locally in your browser. Zero server uploads, complete privacy.

Crypto & Security

15 tools in 6 subcategories

Key Generators

RSA/ECDSA Key Generator

Generate cryptographically secure RSA and ECDSA public/private key pairs using the Web Crypto API - Free online key generator

Cryptographically Secure Password Generator

Generate high-entropy passwords with browser cryptographic randomness and policy controls - Free secure password generator

UUID / GUID Batch Generator

Generate batches of up to 10,000 cryptographically secure UUID v4 (random) or UUID v7 (time-ordered) identifiers in your browser - Free online UUID generator

Encryption

AES File Encryptor/Decryptor

Encrypt and decrypt files locally using AES-256-GCM with PBKDF2 passphrase-based key derivation - Free online AES file encryptor

Token Tools

Construct a JWT token from header and payload JSON with a signing secret — supports HS256, RS256, ES256, and more. Free online JWT builder.

JWT Debugger & Signature Verifier

Decode JWT claims and verify HS/RS/ES signatures in-browser with shared-secret and public-key workflows - Free online JWT debugger

TOTP/2FA Authenticator & Token Generator

Generate RFC6238 TOTP codes from Base32 secrets or otpauth URIs with algorithm and period controls - Free online TOTP generator

Hash Tools

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 checksums for files up to 2GB or any text string - Free online hash generator

Inspectors

SSL Certificate Decoder & Inspector

Decode PEM certificates to inspect issuer, subject, validity, SAN entries, and SHA-256 fingerprint locally - Free certificate inspector

Utilities

QR Code Encoder & Decoder

Generate custom QR codes from text or URLs and decode QR images locally in your browser with private client-side processing - Free online QR tool

Barcode Generator

Generate Code 128, EAN-13, and QR barcodes and download as SVG or PNG — free online barcode generator with custom colors and sizes

Generate HMAC-SHA-256, SHA-384, SHA-512, and SHA-1 signatures for API authentication, webhook verification, and JWT tokens - Free online HMAC generator

Base64/Hex File Encoder & Decoder

Convert binary files to Base64 or Hex strings and decode text back into downloadable files locally in your browser - Free online Base64/Hex file converter

Password Hash Identifier

Identify the algorithm used in a hash string — bcrypt, Argon2, MD5, SHA-256, NTLM, PBKDF2, and 20+ more with confidence scoring - Free online hash identifier

ROT47 Encoder Decoder

Encode and decode text using the ROT47 substitution cipher — shifts all 94 printable ASCII characters (! through ~) by 47 positions. Self-inverse, instant, browser-only. Free online ROT47 encoder decoder.