Regex Tester

Test your regular expressions against sample text with real-time matching, group highlighting, and explanation of regex patterns.

Pattern

Flags

Test String

How to Use Regex Tester

1Enter your regular expression in the pattern field.
2Set flags (global, case-insensitive, multiline).
3Type test text to see matches highlighted.

Frequently Asked Questions

What regex flavors are supported?▾

JavaScript RegExp engine with lookahead, lookbehind, named groups, and Unicode properties.

Can I see capture groups?▾

Yes! Matching groups are highlighted with different colors.

Does it explain the regex?▾

Matches are highlighted in real-time so you can verify your pattern.

About Regex Tester

Test your regular expressions against sample text with real-time matching, group highlighting, and explanation of regex patterns.

NexTool's Regex Tester is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.

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