Browser-local processing

Regex Debugger

Browser-local regex debugger with live matching, capture highlights, reusable pattern snippets, and multiline test text for logs, forms, and config validation.

Local

Input

Input

Enter a pattern and text to start testing.

Output

Output

Matches

0

Flags

g

First index

-

Highlighted preview

Matched results will appear here.

Match list

No matches yet.

This regex tester is part of the Micro Tools Matrix collection of browser-local processing utilities. It is designed for frontend engineers, backend developers, QA specialists, technical writers, and operations teams who need a fast way to validate regular expressions before using them in code, forms, logs, or data-cleaning workflows. Enter a pattern and sample text, then review highlighted matches, match counts, first indexes, and a copyable list of results. Built-in snippets for email addresses, Chinese mobile numbers, URLs, dates, and IPv4 addresses help you start quickly while still allowing full manual editing. All processing happens in your current browser session; your pattern and text are not uploaded, and no remote API is called. As a free online developer tool, it supports practical debugging, privacy-aware validation, and repeatable regex experimentation inside Micro Tools Matrix.

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