What is RegexAI?
RegexAI is a free web tool for working with regular expressions. You describe the text you want to match in plain English, and the AI builds a regex pattern for you. You can also paste an existing regex to test it against sample text.
The tester shows matches live as you type, so you can check a pattern before using it in code. The page offers example prompts such as matching email addresses, extracting phone numbers, finding URLs, matching IP addresses and extracting dates. No signup is mentioned on the page.
Key features
- Generates a regex from a plain-English description
- Live regex testing against sample text
- Tests existing regex patterns pasted by the user
- Ready-made prompts for common patterns like emails, URLs, IP addresses and dates
Who is it for
- Developers
- Data analysts
- Students learning regular expressions
Pros and cons
- Free to use
- No signup required
- Builds patterns from plain English descriptions
- Opisy przyjmowane są po angielsku, tekst strony jest tylko w tym języku
RegexAI pricing
The vendor does not publish prices in a readable form (often pricing is shown only after signing in).
Is RegexAI free?
Yes, there is a free plan. Free to use, no signup, according to the page.
RegexAI alternatives
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 Pinokio | not listed | ? | Browser extensions |
 MaxAI | 12 USD/mo | yes | Browser extensions |
 HARPA AI | 55.4 PLN/mo | ? | Browser extensions |
 Gemini in Chrome | 97,99 PLN/mo | ? | Browser extensions |
 Sider | not listed | yes | Browser extensions |
 Superpower ChatGPT | not listed | yes | Browser extensions |
FAQ
What is RegexAI used for?
Builds regular expressions from plain-English descriptions and tests them live, for developers who write or debug regex.
Is RegexAI free?
Yes, there is a free plan. Free to use, no signup, according to the page.
How much does RegexAI cost?
The vendor does not publish prices publicly or requires sign-in.
What are the best RegexAI alternatives?
Closest alternatives: Pinokio, MaxAI, HARPA AI, Gemini in Chrome, Sider.
Data checked October 12, 2026 on the vendor website (regexai-six.vercel.app).