What it does
RegexAI is a small web tool with two modes. In the AI Build tab you describe what you want to match and it returns a regular expression. In the Test tab you paste an existing regex and check it with live matching. The page offers starter prompts such as matching email addresses, extracting phone numbers, finding URLs, matching IP addresses and extracting dates. The site describes itself as a free online regex tester and builder and says no signup is required. The page is minimal. It does not say which model powers the builder, who runs the tool, or whether usage is limited.
Capabilities
- Describe a pattern in plain English and get a regex
- Paste an existing regex and test it with live matching
- Starter prompts for emails, phone numbers, URLs, IP addresses and dates
- Free, with no signup
When to use it
- Drafting a regex when you can describe the match but not write the pattern
- Quickly checking a regex against sample text
- Starting from a common pattern such as emails, URLs or dates
