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Regex Tester

Test regular expressions against text

Key Facts

Category
Development
Input Types
text, textarea, checkbox
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

Regex Tester is an online development tool for test regular expressions against text. It is especially useful when working with text, regex content.

When to Use

  • •Use it when you need to process text, regex content quickly in the browser.
  • •Helpful for development workflows that need repeatable inputs and fast results.
  • •Useful when you want to test input and output behavior before integrating the workflow elsewhere.

How It Works

  • •Provide Regex Pattern, Flags, Test Text, Show All Matches as input to the tool.
  • •The tool processes the request and returns a text result.
  • •For repeatable workflows, use the API endpoint shown on the page after validating the result interactively.

Use Cases

Process text, regex data during debugging or QA.
Validate expected output before using the API or automation flows.
Compare small variations of input to understand output differences quickly.

Try with Samples

text, regex
Common Regex Patterns
Commonly used regular expression patterns for validation and matching
title token regex
regex
Regex Named Capture Groups
Collection of regex patterns using named capture groups for extracting structured data from text. Named groups make patterns more readable and maintainable by assigning meaningful names to captured portions.
title token regex
regex
Regex Replace Samples
Collection of common and useful regex replacement patterns for text transformation and data cleaning
title token regex
regex
Regex Pattern Alternatives
Multiple ways to write the same regex pattern with different trade-offs in readability, performance, and accuracy
title token regex
regex

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FAQ

What does Regex Tester do?

Regex Tester helps you process text, regex content online without setting up a separate local script or app.

When should I use this tool?

Use it when you need a quick process workflow, want to verify output, or need a browser-based utility for development tasks.

Can I try this tool with sample data?

Yes. Try short representative inputs first, then move to larger or more complex cases once the output looks correct.

What inputs does Regex Tester accept?

Regex Tester accepts Regex Pattern, Flags, Test Text, Show All Matches.

Is there an API for Regex Tester?

Yes. The tool page includes an API endpoint so you can move from manual testing to scripted usage.

API Documentation

Request Endpoint

POST /en/api/tools/regex-tester

Request Parameters

Parameter Name Type Required Description
pattern text Yes -
flags text No -
testText textarea Yes -
showMatches checkbox No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-regex-tester": {
      "name": "regex-tester",
      "description": "Test regular expressions against text",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=regex-tester",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]