Question 1

What is a regex tester?

Accepted Answer

A regex tester is an online tool that lets you write a regular expression and test it against a string, showing matches highlighted in real time.

Question 2

What regex flags are supported?

Accepted Answer

The tool supports g (global), i (case-insensitive), m (multiline), s (dotAll) and u (unicode) flags.

Question 3

Does it show capture groups?

Accepted Answer

Yes. Each match shows the full match value, its index position, and all capture group values.

Question 4

Is my data safe?

Accepted Answer

Yes. All regex evaluation happens entirely in your browser using JavaScript. No data is sent to any server.