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Test regular expressions. Match against sample text. See matches and groups. For developers.

Format and beautify SQL queries. Supports SELECT, INSERT, UPDATE, DELETE, CREATE. Standard or Compact style.

Parse cron expressions to human readable. Explain schedule. For cron jobs and scheduling.

Build cron expressions visually with an interactive interface. See human-readable descriptions and next run times. No memorization needed.

Look up HTTP status codes. 200, 404, 500 etc. Get description and category.

Parse HTTP headers to JSON. Extract header key-value pairs. For debugging requests.