Question 1

How do I test a regex?

Accepted Answer

Enter your regex pattern in the pattern input, set the desired flags (g, i, m, s), and type or paste text in the test string area. Matches are highlighted in real time.

Question 2

What regex flags are available?

Accepted Answer

Four flags: g (global — find all matches), i (case-insensitive), m (multiline — ^ and $ match line boundaries), and s (dotAll — . matches newlines).

Question 3

Does this tool support capture groups?

Accepted Answer

Yes. Use parentheses in your pattern to create capture groups. Each match result shows the full match and all captured groups.

Question 4

What are the common patterns?

Accepted Answer

The tool includes pre-built patterns for email addresses, URLs, phone numbers, IP addresses, dates, hex colors, HTML tags, and integers. Click any to load it instantly.

Question 5

Is my data safe?

Accepted Answer

Yes. All regex testing happens in your browser using JavaScript. Your text is never sent to any server.

Regex Tester

Regex Tester