Regex Generator — Free Online Regex Tester & Validator

Test and validate regular expressions with live preview. Find all matches, check patterns, and share via URL — runs entirely in your browser. This free online regex tester and validator runs entirely in your browser — no data is ever uploaded to a server.

How to Use

1. Enter your input — type or paste your regex pattern, flags, and test string.

2. See live results — the tool updates instantly as you type.

3. Copy or download — copy the output to clipboard or download it.

4. History — your recent inputs are saved locally and can be pinned for quick access.

Example

Pattern ^\d{3}-\d{2}-\d{4}$ (escaped as ^\d{3}-\d{2}-\d{4}$ in the UI) with test string 123-45-6789. It reports "Pattern matches!" and highlights the matched value.

Also check out the live tool at freeq.one/tools/regex — part of the FreeQ.One suite of free online tools.