regex-generator ⌄
regex-generator ⌄

AI Regex Generator

Describe what you want to match and I'll write the regex for you. Specify your language (Python, JavaScript, etc.) for syntax-accurate output.

Build and test a regular expression

Specify the regex engine, matching rules, and examples that should pass and fail. Tell the tool whether you want extraction or validation.

Example prompt and checks

Try this prompt

For JavaScript, match an entire string of exactly three uppercase letters followed by four digits. Give positive and negative examples.

Check the answer

Test anchors, Unicode, multiline input and long adversarial strings. Regex syntax and performance differ between engines.

Prepared by the AskAI Editorial Team (see About AskAI.free). These examples illustrate how to ask a question; they are not records of a measured model test.

Read the Regex Generator guide for more context, or check current plan allowances.