Which regex flavor does this use?

It uses the JavaScript RegExp syntax supported by your browser.

Can a regular expression freeze a page?

Some patterns cause catastrophic backtracking. This tester runs matching in a worker with a short timeout to reduce that risk.

Developer

Explore JavaScript regular expressions against sample text and inspect matches and capture groups with a bounded execution time.

Local processing. Your data stays in this browser.

Pattern

Test text

0 matches

Highlighted text

Contact hello@naminc.tech or visit naminc.tech.

Matches and groups

Run the pattern to inspect matches.

Input

Pattern: \b\w+@\w+\.\w+\b

Output

Matches email-like values in the test text.

Which regex flavor does this use?: It uses the JavaScript RegExp syntax supported by your browser.
Can a regular expression freeze a page?: Some patterns cause catastrophic backtracking. This tester runs matching in a worker with a short timeout to reduce that risk.