Zero-Telemetry Cryptography & Security Toolkit for Developers
Compute SHA-256, inspect JWT tokens, derive PBKDF2 keys, encrypt with AES-GCM, and generate UUID v7 — 100% in your browser using the W3C Web Cryptography API.
Architecture & Classification
Browse by Cryptographic Suite
From FIPS-approved hashing algorithms to modern RFC 9562 UUID v7 and WebAuthn key pairs.
Hashing & Checksums
Cryptographic hash functions and data integrity checksums running entirely in your browser.
Passwords & Key Derivation
Bcrypt, PBKDF2, HMAC, Scrypt, password entropy analyzers and secure passphrase generators.
JWT & API Tokens
Decode, sign, verify and inspect JSON Web Tokens (JWT), PASETO, API keys and CSRF tokens.
Ciphers & Encryption
Symmetric encryption using AES-GCM, AES-CBC, ChaCha20-Poly1305, 3DES and classical ciphers.
Public Keys & Signatures
Generate RSA, Ed25519, Curve25519, ECDSA, SSH keys and sign or verify digital signatures.
SSL/TLS & Certificates
Parse X.509 PEM certificates, CSRs, inspect SSL expiry, SAN domains and extract PKCS#12 bundles.
Encodings & Converters
Fast binary-to-text converters: Base64, Base64URL, Base58 (Bitcoin), Base32, Hex, and URL encoding.
Unique IDs & Web3
Generate RFC 9562 UUID v7, v4, ULID, NanoID, BIP-39 mnemonic seeds and validate crypto wallet addresses.
Most Popular Utilities
High-Impact Daily Developer Tools
SHA-256 Hash Generator
Calculate 256-bit SHA-256 cryptographic hashes instantly in your browser using the native Web Cryptography API. Zero data upload, 100% private.
JWT Token Decoder
Decode and inspect JSON Web Tokens (JWT) client-side. Parse header, payload claims (iss, sub, exp, iat), and signature without sending tokens to any server.
RSA Key Pair Generator (2048 & 4096-bit)
Generate cryptographically secure 2048-bit, 3072-bit, and 4096-bit RSA public and private key pairs in standard PKCS#8 and SPKI PEM format in your browser.
X.509 Certificate (PEM/CRT) Decoder
Decode and inspect X.509 SSL/TLS certificates (PEM/CRT format) client-side. View Subject, Issuer, Validity Period, SANs, and Serial Number with zero data leaks.
Base64 Encoder & Decoder
Encode plaintext into Base64 or decode Base64 into UTF-8 strings and binary byte arrays in your browser. Fast, bidirectional, and private.
UUID v7 (Time-Ordered Modern RFC 9562) Generator
Generate time-ordered UUID v7 identifiers specified in RFC 9562. Combines millisecond Unix timestamp with random bits for optimal database B-Tree index performance.
Why Enterprise Developers Refuse Cloud Crypto Tools
Pasting production JWT authorization headers, private RSA keys, or customer hashes into third-party web tools creates extreme security vulnerabilities and violates SOC2 and ISO 27001 compliance.
WebCryptoTools was built from day one to execute 100% inside your browser thread. Our application communicates zero payload data to any remote backend server. Open your browser's Developer Tools Network tab to verify that no network requests occur during cryptographic execution.
Native Web Crypto API
Leverages hardware-accelerated CPU instructions for sub-millisecond execution.
Offline Capable
Disconnect your WiFi after loading; all 105 tools remain 100% operational.
Zero Secrets Logged
No session storage, no server databases, and zero analytics telemetry on inputs.