Regex Replace Tester

Enter a regular expression, replacement string, and sample text. See the replace result. Uses JavaScript replace (global flag).

Test replace

Regex pattern

Replacement

Sample text

Result

Copy

How it works

We create a RegExp with the g flag, then use String.prototype.replace(). $1, $2 in replacement refer to capture groups.

When to use it

Use when writing or debugging replace patterns (e.g. for search-and-replace).

Frequently asked questions

Replace all?

We use the g flag so all matches are replaced.