Regex Tester
Test a JavaScript regular expression against sample text.
Test and debug
Check patterns against sample text without sending it away.
5 tools in this part of the catalogue.
Cron Expression Explainer
Build cron expressions and preview their next runs.
XML XPath Query Tester
Test XPath against pasted XML.
JSONPath Query Tester
Find JSON values with a bounded JSONPath query.
HAR Viewer and Redactor
Review and reduce a saved HAR.