Dude, come on.. type "regex generator" into google Answer from Awkward_Car_7089 on reddit.com
Regex Generator
regex-generator.olafneumann.org
Regex Generator - Creating regex is easy again!
A tool to generate simple regular expressions from sample text. Enable less experienced developers to create regex smoothly.
Javainuse
javainuse.com › rexgenerator
Online Regex Generator Tool
Hex Encoder/Decoder Convert text ... Measure string length with/without spaces JSON Size (Bytes) Check JSON payload footprint XML Size (Bytes) Measure XML size quickly UTF-8 Encoder/Decoder Round-trip text and UTF-8 bytes JSON -> NDJSON Convert collections to newline-delimited JSON Cron Generator Craft and copy cron expressions JSON -> YAML Convert JSON documents to YAML YAML -> JSON Transform YAML into JSON YAML -> POJO Generate Java models from YAML Regex Generator ...
Tool to generate regex from sample?
Dude, come on.. type "regex generator" into google More on reddit.com
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October 8, 2021java - Regex to String generation - Software Engineering Stack Exchange
Correction, I used a grammar ... is a regex)... maybe it would be more familiar to you as a*b ... Could you show what you are intending with a trivial example and its solution? Preferably, one example with and one without the Kleene star. You might want to consider restricting the regular language further to the finite languages and star-free languages. ... A regular expression maps directly to a finite state machine. Generating strings from the FSM is ... More on softwareengineering.stackexchange.com
Regex generator
Sounds like you're looking for something like grex . Mind you, this does not save you from learning about regular expressions. It‘s more of a supporting tool. More on reddit.com
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February 3, 2023Regex Generator?
I don't have experience with regex generators, but if relevant you can check out my regex page for explanations For the "you're dumb" issue you can use 'you\W?a?re? dumb' testing: https://regex101.com/r/AySSxB/1 More on reddit.com
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April 17, 2023What is regex in AI?
In AI applications, regex (regular expressions) is used for text preprocessing, data extraction, and pattern matching before feeding data to machine learning models. AI can also generate regex patterns from natural language descriptions, which is exactly what this tool does - you describe the pattern you need in plain English, and AI creates the regex syntax for you.
formulabot.com
formulabot.com › ai-regex-generator
Free AI Regex Generator | Text to Regex
What programming languages work with the generated regex?
The regex patterns generated work with virtually all programming languages including JavaScript, Python, Java, C#, PHP, Ruby, Go, and Rust. They also work in text editors like VS Code, command-line tools like grep and sed, and database systems. If you need a flavor-specific pattern, just mention the language in your request.
formulabot.com
formulabot.com › ai-regex-generator
Free AI Regex Generator | Text to Regex
Can AI write regex patterns for me?
Yes, that's exactly what this tool does. Describe what you want to match (e.g., "validate email addresses" or "extract phone numbers from text") and the AI generates a working regex pattern. You can also paste existing regex patterns to get plain-English explanations of what they do.
formulabot.com
formulabot.com › ai-regex-generator
Free AI Regex Generator | Text to Regex
Videos
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Give me 12 minutes and I'll make you a REGEX WIZARD - YouTube
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How to Write Regular Expressions Without Going Crazy (Beginners ...
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Learn Regex For Make.com In 34 Minutes - YouTube
05:39
AI-driven Regular Expression Generator - YouTube
Chat GPT & Make.com: How to Generate REGEX to Match ...
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Use ChatGPT to Build a RegEx Generator – OpenAI API Low Code ...
RegExr
regexr.com
RegExr: Learn, Build, & Test RegEx
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
Reddit
reddit.com › r/regex › tool to generate regex from sample?
r/regex on Reddit: Tool to generate regex from sample?
October 8, 2021 -
I know of solutions like regex101, that enable to test a regex. It's still something that requires time to figure out one's needed regex to start with 😅
Wondering if there is a tool that enables you to provide a sample string, indicating what part of the string you would want to extract, that will generate the relevant regex? 🤔
Regex101
regex101.com
regex101: build, test, and debug regex
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
Visual Studio Marketplace
marketplace.visualstudio.com › items
Regex Text Generator - Visual Studio Marketplace
Extension for Visual Studio Code - Generate text based on Regular Expression (regex)
Online String Tools
onlinestringtools.com › generate-string-from-regex
Generate a String from Regex – Online String Tools
Free online string from regex generator. Just load your regex and it will automatically generate strings that match it. There are no intrusive ads, popups or nonsense, just a string from regex generator. Load a regular expression, get a string.
Mozilla
developer.mozilla.org › en-US › docs › Web › JavaScript › Guide › Regular_expressions
Regular expressions - JavaScript | MDN
This allows you to do new RegExp(RegExp.escape("a*b")) to create a regular expression that matches only the string "a*b".
Wimpyprogrammer
wimpyprogrammer.com › regex-to-strings
RegEx to Strings - Generate strings that satisfy a Regular Expression pattern
A tool to generate strings that satisfy a given Regular Expression pattern.
Formula Bot
formulabot.com › ai-regex-generator
Free AI Regex Generator | Text to Regex
Our AI Regex Generator lets you describe what you want to match in plain English and get a working pattern instantly. No more memorizing character classes or wrestling with lookaheads. Match and validate email addresses with proper domain formatting and common patterns. Extract or validate phone numbers in various formats, with or without country codes. Pull specific data from logs, documents, or any text source using pattern matching.
Text
platform.text.com › tools › regex-builder
Text Platform | Regex Builder
Create and test your regular expressions in our free online regex builder.
Musely
musely.ai › tools › generate-strings-from-regex
Generate Strings From Regex Pattern
To generate strings from a regex pattern, follow these steps: Step 1: Choose a regex library or tool that supports string generation (like Generex for Java or RgxGen). Step 2: Input your regex pattern into the tool. Step 3: Specify the generation parameters (random, sequential, or all possible ...
Path of Exile
poe.re
Path of Exile Regex
Path of Exile Regex
Regex
regex.ai
Regex.ai - Artificial Intelligence Regular Expression Generator
Insert your text and drag the cursor to highlight multiple strings to find matching regular expression.
Formulas HQ
formulashq.com › free-regex-generator-and-explainer
Free Regex Generator: Unlock the Power of Text Matching
March 25, 2025 - Developers often use regex for validation, search functionalities, and string manipulation. With our generator, creating regex patterns for these tasks becomes straightforward and efficient. Data analysts can use regex to clean and process large datasets. Tasks like extracting phone numbers, dates, or specific text segments from data are simplified with our regex generator.
npm
npmjs.com › package › regex-to-strings
regex-to-strings - npm
Generate strings that match a Regular Expression pattern. Efficiently generate all possible matches, or only the quantity you need. ... import { expand } from 'regex-to-strings'; const phoneNumberPattern = /((\(555\) ?)|(555-))?\d{3}-\d{4}/; const phoneNumberExpander = expand(phoneNumberPattern); console.log(phoneNumberExpander.count); // 40000000 for (const phoneNumber of phoneNumberExpander.getIterator()) { console.log(phoneNumber); // (555)547-4836 // 476-2063 // 467-2475 // (555) 194-2532 // (555)403-4986 // 555-838-9771 // etc.
» npm install regex-to-strings
Published Dec 13, 2021
Version 2.1.0
GeeksforGeeks
geeksforgeeks.org › dsa › write-regular-expressions
Regex Tutorial - How to write Regular Expressions - GeeksforGeeks
#include <regex> #include <iostream> #include <string> using namespace std; int main() { regex pattern(R"(^[a-zA-Z0-9_-]+\.(jpg|png|gif)$)"); // Raw string literal for regex string filename = "file123.jpg"; if (regex_match(filename, pattern)) { cout << "Valid image filename" << endl; } else { cout << "Invalid filename" << endl; } return 0; }
Published December 22, 2025
Python documentation
docs.python.org › 3 › library › re.html
re — Regular expression operations
May 25, 2026 - Source code: Lib/re/ This module provides regular expression matching operations similar to those found in Perl. Both patterns and strings to be searched can be Unicode strings ( str) as well as 8-...
Rows
rows.com › tools › regex-generator
Regex Generator
Asking for "strings that look like email addresses" you get the Regex __^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$__ ... Regular expressions (Regex) are a powerful tool used in programming to match patterns within text, such as specific words, numbers, or formats. A "match pattern" refers to the specific sequence or format of characters that the Regex is designed to find within text. This Regex generator helps you effortlessly transform plain-language descriptions into complex Regex patterns, making it accessible to everyone who finds the typical Regex syntax intimidating.
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A regular expression maps directly to a finite state machine. Generating strings from the FSM is straightforward with a backtracking algorithm. The example is for the regular expression /aa?b/
(start) 0 -- a --> 1 -- a --> 2 -- b --> 3 (accepting and terminal)
| ^
|---------b ----------|
State Previous char Input char Input string History
0 null -- []
a a
1 null [{a,1}]
a aa [{a,1},{a,2}]
2 null
b aab [{a,1},{a,2},{b,3}]
3 null
Accepting state, emit 'aab' as valid input
Terminal state, backtrack
2 b aa [{a,1},{a,2}]
No further valid inputs, backtrack
1 a a [{a,1}]
b ab
3 null [{a,1},{b,3}]
Accepting state, emit 'ab' as valid input
Terminal state, backtrack
1 b a [{a,1}]
No further valid inputs, backtrack
0 a -- []
No further valid inputs, stack empty, terminate
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On their own, regexes are serving the purpose of answering the question: "Given this list of strings as input and this pattern, which subset mathces it?". It does not work backwards i.e. from this regex, start generating strings that match it.
Having said that, take a look at this: https://code.google.com/p/xeger/, that is supposed to do what you want to achieve (with some limitations as described in https://code.google.com/p/xeger/wiki/XegerLimitations).
If your regex is accepted, I guess the anwer to your question is pretty straightforward i.e. generate the list and take the item at index i