Developer Tools
Regex testers, JWT decoders, cron explainers
Regex Tester
Test and debug regular expressions with live matching and highlighting
JWT Decoder
Decode and inspect JSON Web Tokens without verification
JSON to YAML Converter
Convert JSON data to YAML format and vice versa
Cron Expression Explainer
Understand what a cron schedule expression means in plain English
HTML Entity Encoder
Encode and decode HTML entities
HTTP Status Code Reference
Look up HTTP status codes and their meanings
Chmod Calculator
Calculate Unix file permissions in numeric and symbolic notation
Token Counter
Count tokens for GPT, Claude, and other LLM models