Developer Tools
Test regular expressions against sample text and inspect matches quickly.
Use this regex tester to try a pattern against sample text and see whether it matches. It is useful for developers, QA work, validation rules, parsing, scraping patterns, text extraction, and debugging regex behavior before you add the expression to real code.
Use this regex tester to try a pattern against sample text and see whether it matches. It is useful for developers, QA work, validation rules, parsing, scraping patterns, text extraction, and debugging regex behavior before you add the expression to real code.
Use regex tester when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
\d+ g Order 123 and order 456
Output
123, 456
Useful for checking whether a pattern finds all number sequences.
Input
^[A-Z]+$ i Hello
Output
Match found
Shows how flags can change whether a pattern matches.
Fix: Add flags like g or i when the use case depends on them.
Fix: Review escaping carefully and test with a small minimal pattern first.
Fix: Start with a simple test case, confirm the match, then expand to the full input.
Put the regex pattern on the first line, flags on the second line, leave a blank line, then paste the test text.
You can use standard JavaScript regex flags such as g, i, m, s, u, and y.
It helps you check match behavior before using a pattern in production code, validation, or parsing logic.
Yes. It works online in the browser.
A regex tester evaluates pattern logic, flags, and match behavior, not just simple string presence.