Regex Checker
Test regular expressions and highlight matching strings in your target text.
Cron Expression Checker
Parse Cron syntax to verify schedules and upcoming execution dates.
CSS Selector Checker
Extract and highlight target elements from HTML/XML using CSS selectors.
XPath Checker
Extract and highlight target nodes from HTML/XML using XPath expressions.
About this site
A collection of browser-based utilities for developers and power users—format JSON and SQL, test regex and XPath, encode data, and generate passwords or Wi-Fi QR codes without installing software.
All tools process your inputs locally in the browser. Your text is not uploaded to or stored on our servers for these operations (the page itself is delivered over HTTPS).
We may show ads (e.g., Google AdSense). See the Privacy Policy for cookies/ad tech and the Terms & Disclaimer for conditions of use. Be careful on shared or projected screens.
Outputs are provided as-is; do not rely on them as the sole basis for security or legal decisions.