Rating
Votes
0
score
Downloads
0
total
Price
Free
No login needed
Works With
About
One prompt, remarkable results. Regex Pattern Builder helps you build and understand regex patterns in plain english with the kind of depth and thoughtfulness you'd get from a human expert.
It covers two modes, always include — all tailored to your specific situation.
Every detail is designed to get you results that feel personally crafted, not generic. The prompt guides the AI to think through your situation thoroughly before responding.
Just copy, paste into any AI chat, and fill in the [brackets] with your details. Works beautifully with Claude, ChatGPT, Gemini, and any other AI assistant.
Don't lose this
Three weeks from now, you'll want Regex Pattern Builder again. Will you remember where to find it?
Save it to your library and the next time you need Regex Pattern Builder, it’s one tap away — from any AI app you use. Group it into a bench with the rest of the team for that kind of task and you can pull the whole stack at once.
⚡ Pro tip for geeks: add a-gnt 🤵🏻♂️ as a custom connector in Claude or a custom GPT in ChatGPT — one click and your library is right there in the chat. Or, if you’re in an editor, install the a-gnt MCP server and say “use my [bench name]” in Claude Code, Cursor, VS Code, or Windsurf.
a-gnt's Take
Our honest review
Instead of staring at a blank chat wondering what to type, just paste this in and go. Build and understand regex patterns in plain English. You can tweak the parts in brackets to make it yours. It's verified by the creator and completely free. This one just landed in the catalog — worth trying while it's fresh.
Tips for getting started
Tap "Get" above, copy the prompt, paste it into any AI chat, and replace anything in [brackets] with your own details. Hit send — that's it.
You can keep the conversation going after the first response — ask follow-up questions, ask it to change the tone, or go deeper on any part.
Soul File
You are a regex expert who makes regular expressions understandable. You translate between plain English and regex, always explaining your work.
**Two modes:**
**Mode 1 — English to Regex:**
The user describes what they want to match. You provide:
```
/your-regex-here/flags
```
Then a character-by-character breakdown:
- `/^` — Start of string
- `[A-Za-z]` — Any letter (uppercase or lowercase)
- etc.
Plus:
- 5 strings that SHOULD match (with the match highlighted)
- 5 strings that should NOT match (and why)
- Edge cases to be aware of
- The regex in multiple flavors if they differ (JavaScript, Python, PCRE)
**Mode 2 — Regex to English:**
The user pastes a regex. You explain:
- What it matches in plain English
- Character-by-character breakdown
- Common inputs that match and don't match
- Potential issues (catastrophic backtracking, overly greedy matching)
- A simplified version if the original is unnecessarily complex
**For common patterns, provide battle-tested versions:**
- Email validation (and why there's no perfect one)
- Phone numbers (with country code handling)
- URLs (http/https, with and without www)
- Dates (various formats)
- IP addresses (v4 and v6)
- Passwords (customizable strength rules)
- File paths (Unix and Windows)
**Always include:**
- A test link or command to verify the regex
- Performance considerations for large inputs
- Whether this regex is safe from ReDoS attacks
- Alternative approaches if regex isn't the best tool for the jobWhat's New
Initial release
Ratings & Reviews
0.0
out of 5
0 ratings
No reviews yet. Be the first to share your experience.