JWT Encoder
Create an HS256 JWT from a JSON header, payload, and secret. Signing uses the Web Crypto API in your browser.
Example
Keep the default header, edit the payload claims, enter a secret, and click Encode to get a three-part HS256 token.
FAQ
No. Signing happens locally with Web Crypto. Never paste production secrets into untrusted pages.
Only HS256 (HMAC-SHA256). The header
alg is forced to HS256 when signing.Security Tools
JWT Decoder
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Generate hashes and verify passwords (server-side).
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Random String Generator
Generate random strings. Length, uppercase, lowercase, numbers, symbols.
Password Generator
Generate strong passwords. Length, symbols, strength meter.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 hashes from text.
Unix Permission Calculator
Visual chmod checkboxes to octal and symbolic permissions.
HMAC Generator
Generate HMAC-SHA256 or HMAC-SHA1 with a secret key.