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Free Online Security and Encoding Tools

Decode JWTs, encode Base64, calculate hashes, generate passwords, parse URLs, inspect query strings, generate bcrypt hashes, and test auth data locally.

Security
JWT Decoder
Read the header and payload of a JSON Web Token.
Security
Base64 Encoder/Decoder
Encode text and images to Base64, or decode Base64 text.
Security
URL Encoder/Decoder
Encode and decode URLs, query strings, and URI text.
Security
Hash Calculator
Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes.
Security
Bcrypt Generator
Generate bcrypt hashes and verify password matches.
Security
JWT Generator
Create signed JSON Web Tokens for API and auth testing.
Security
URL Parser
Parse URLs into components and decoded query parameters.
Security
Query String Parser
Parse query strings into decoded parameters and JSON.
Security
URL Validator
Validate URLs and inspect protocol, host, path, and query parts.
Security
Password Generator
Generate strong random passwords with Web Crypto.

Security workflows

Use these browser-based security utilities for everyday debugging and test data work without sending secrets through a backend service.

These tools are most useful for inspecting encoded values, auth tokens, hashes, and URLs while keeping the work in the browser.

Common starting points

JWT Decoder - Read the header and payload of a JSON Web Token.Base64 Encoder/Decoder - Encode text and images to Base64, or decode Base64 text.URL Encoder/Decoder - Encode and decode URLs, query strings, and URI text.Hash Calculator - Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes.Bcrypt Generator - Generate bcrypt hashes and verify password matches.JWT Generator - Create signed JSON Web Tokens for API and auth testing.