AI Regex Generator
AI Regex Generator
Generate Regex Patterns from Plain Text
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How it works
From Description to Working Regex
Regular expressions are powerful but hard to write by hand. Let the AI do the syntax:
Describe the pattern
Say what you want to match in plain language — emails, dates, phone numbers, codes — and mention any edge cases that matter to you.
AI builds the regex
The AI writes a regular expression for your description in seconds, ready to copy into your code, editor or data tool.
Test it live
Paste sample text into the built-in tester and watch matches highlight instantly (JavaScript flavor), so you can verify the pattern before using it.
What it builds
Describe the text, get the pattern
Generate a pattern from plain language, then prove it on your own sample text with the built-in live tester.
Emails, phone numbers, postal codes — describe the format you accept and get the pattern that enforces it.
Pull dates, amounts or reference codes out of messy text and logs.
Patterns ready for your editor's search-and-replace, with groups where you need them.
Paste sample text under the result and watch matches highlight as you type (JavaScript regex flavor).
Enforce ID shapes like ABC-1234 or order numbers across your data entry.
Send any generated pattern to the Regex Explainer to learn what each token does.
- Free
- No sign-up, no ads — use it right in your browser
- Live tester
- Try the pattern on your own sample text right on the page
- 34
- Page languages — describe the text to match in your own words
- Private
- Your description is processed only to generate the pattern and never shared
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Frequently Asked Questions
A regular expression (regex) is a compact way to describe a text pattern — used for searching, validating and extracting text in code editors, spreadsheets and programming languages.
The live tester runs in your browser using the JavaScript regex engine. Most patterns behave the same across flavors, but a few advanced constructs differ — test in your target tool for certainty.
Common patterns come out very reliably. For unusual requirements, use the live tester with your own sample text — and refine your description if a case is missed.
Yes — modern Excel supports regex via functions like REGEXTEST and REGEXEXTRACT (Microsoft 365), and VBA can use regex through the VBScript.RegExp object.