About this tool
A live regex playground. Type an expression, paste sample text, and see matches highlighted immediately — with capture groups broken out.
How it works
- Enter the pattern and flags (g, i, m, s, u).
- Paste text into the sample area.
- Matches are highlighted; the sidebar lists each match with its capture groups.
When to use it
- Extracting fields from LLM output before parsing.
- Building URL/route matchers.
- Validating user input in a form.