JWT Secret Generator — Create HMAC Signing Secrets
Generate cryptographically strong JWT secrets for HS256 and other HMAC algorithms. Free client-side JWT secret generator.
Frequently Asked Questions
What is a JWT Secret?
A JWT secret is a cryptographic key used to sign JSON Web Tokens (JWTs) via HMAC algorithms like HS256. It should be a high-entropy random string.
How long should a JWT secret be?
For HS256, use at least 32 bytes (256 bits) of random data. The generator produces 64 bytes by default, which exceeds security recommendations.
Can I use a passphrase as a JWT secret?
No. JWT secrets must be raw random bytes, not human-readable passphrases. Use a dedicated high-entropy random generator.
Related Tools
API Key Generator — Create Test API Keys
Generate realistic API keys for testing. Supports Stripe-style, GitHub-style prefixes, and more. Free client-side API key generator.
Passphrase Generator
Generate memorable passphrases using random word lists. More secure than traditional passwords and easier to remember. Free passphrase generator.
Password Generator
Generate strong, secure random passwords with configurable length, character types, and complexity. Free client-side password generator.
Password Strength Checker
Check password strength, calculate entropy, estimate crack time. Free client-side password analyzer.
Random PIN Generator — Create Secure Numeric Codes
Generate random numeric PIN codes with configurable length (4-8 digits). Free client-side PIN generator for ATM, mobile, and access codes.
Random Token Generator
Generate cryptographically random tokens in hex, base64, and base64url formats. Free client-side token generator.
Session Secret Generator — Secure Session Keys
Generate secure session signing secrets for web application cookies. Free client-side session secret generator.
UUID Generator — Create Unique Identifiers Online
Generate UUID v4 identifiers. Free client-side UUID generator for database keys, API identifiers, and distributed systems.
UUID v7 Generator — Time-Ordered UUIDs (RFC 9562)
Generate time-ordered UUID v7 identifiers per RFC 9562. Sortable by creation time. Free client-side UUID v7 generator.
Webhook Secret Generator — Create Signing Secrets
Generate secure webhook signing secrets with whsec_ prefix. Free client-side webhook secret generator.