Question 1

What regex flavors does it support?

Accepted Answer

Formly's regex tester uses JavaScript's native RegExp engine, which supports standard regex syntax compatible with most modern languages.

Question 2

How do I test a regex?

Accepted Answer

Type or paste your regular expression in the Pattern field, add any flags (g for global, i for case-insensitive, m for multiline), then paste your test string. Matches are highlighted in real time.

Question 3

Can I test regex replacements?

Accepted Answer

Yes — enable Replace mode and enter a replacement string to preview the result of regex substitution before using it in code.

Question 4

Is there a library of common patterns?

Accepted Answer

Yes — the Quick Patterns library includes ready-to-use patterns for email addresses, URLs, phone numbers, IP addresses, dates, credit cards, and more.

Regex Tester

Quick Patterns