Regex Tools
Regular expressions (regex) are a powerful pattern-matching mini-language supported by every major programming language. Test JavaScript regex patterns against any input string with real-time match highlighting, group capture display and instant error feedback.
1 tool
About Regex Tools
Regular expressions (regex) are a powerful pattern-matching mini-language supported by every major programming language. Test JavaScript regex patterns against any input string with real-time match highlighting, group capture display and instant error feedback.
Common Use Cases
- Test regex patterns with real-time match highlighting
- Debug complex regular expressions interactively
- Validate email, phone number and URL patterns
- Explore capture groups and named group syntax
- Learn regular expressions with immediate feedback
Frequently Asked Questions
QAre these Regex tools free?
Yes — all 1 Regex tools are completely free with no account, no subscription and no paywalls. All processing runs entirely in your browser.
QDoes my data get sent to a server?
No. Every Regex tool processes data entirely in your browser using JavaScript and WebAssembly. Nothing you paste, type or import is transmitted to any server.
QHow many Regex tools are available?
There are currently 1 Regex tools available. Browse them all on this page or use the search bar to find a specific tool.
QDo the tools work offline?
Most tools work offline once the page has loaded, since all processing is client-side. A small number of tools that fetch external assets may require an initial network connection.