Generate random MAC addresses and validate format. Supports multiple notation styles for network configuration.

Compare two text blocks line-by-line. Instant diff highlighting for code, configs, and documents. No installation required.

Safely decode and inspect JSON Web Tokens (JWT). View the header and payload claims in a formatted, readable JSON view, verify signature existence, and check token expiration—all client-side without transmitting sensitive tokens.

Convert Unix timestamps to dates and vice versa. Supports milliseconds and batch conversion. Free online tool.