Regex Builder — Free AI Tool for Students
Build regex patterns with AI. Free regex generator — describe your pattern in plain English and get the exact regular expression with a clear explanation.
Frequently asked questions
Yes. Every token and group in the generated regex is annotated with its purpose.
Paste sample text alongside your description to verify the pattern against real examples.
PCRE, JavaScript, Python (re module), Java, .NET, and Go regex are all supported.
Yes. Describe what you want to extract (e.g. 'all phone numbers') and the regex captures that.
Yes. Paste your regex and ask for a plain-English explanation or a simplified equivalent.
Yes. Named and unnamed capture groups are used where appropriate.
Yes. It generates the pattern and explains each part — the best way to learn regex.
Yes. Describe multiple requirements and it combines them into a single expression where possible.
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