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Regex Tester Tool - Test and debug regular expressions

Easily test, debug and refine your regular expressions with our free online Regex Tester Tool. Perfect for developers, programmers and anyone working with text patterns.

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The Ultimate Online Regex Tester

If you have ever worked with text, from validating email addresses to extracting specific data from a log file, you have probably encountered the term Regex or "Regular Expressions." Our free online Regex Tester makes writing, testing, and debugging these powerful patterns easy and visual. Without this tool, testing a regular expression can be a time-consuming process of trial and error.

Why use our Regex Tester?

  • Visual Feedback: Instantly see which parts of your text match your pattern. The tool highlights all matches in real-time.
  • Efficient Debugging: Discover errors in your pattern and adjust your expression to get exactly what you are looking for.
  • On-the-fly Explanation: Get an explanation of the different parts of your regex, so you can better understand the logic.

How does our Regex Tester work?

Our tool is designed to be extremely user-friendly. Follow these steps:

  1. Enter your pattern: Type your regular expression into the "Regex Pattern" field.
  2. Paste your text: Copy and paste the text you want to test into the "Text" field.
  3. View the matches: The tool immediately shows all matches and submatches, with the option to adjust different flags (such as global or case-sensitive).

Frequently Asked Questions

Here we answer some frequently asked questions:

What is a Regex?

A Regex is a sequence of characters that forms a search pattern. It is used to find, match, and manipulate patterns in a sequence of text.

What is the difference between `.` and `s`?

`.` matches any character except a newline. `s` matches any whitespace, including spaces, tabs, and newlines.

Fun Facts about Regular Expressions

  • The history of regular expressions dates back to the 1950s when the mathematician Stephen Cole Kleene introduced the concept.
  • Regular expressions are supported in almost every modern programming language, including JavaScript, Python, PHP, and Java.

Test, learn, and perfect your regular expressions with our powerful online tool.

FAQ

How are the files processed?

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Your privacy and security are our top priority. Files are deleted from our servers immediately after processing. We do not store your files.

Is the website safe to use?

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Yes, our website is fully secured with SSL encryption to ensure that all of your data is transmitted safely.

Are there costs associated with the service?

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There are no costs associated to the services we deliver. Everything is free and has unlimited access

Which file formats are supported?

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We support a wide range of file formats, including PDF, DOC, DOCX, XLSX, JPG, PNG, and more. You can find the full list on our website.

Why are my conversions taking so long?

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The duration of a conversion can vary. Complex tasks require more processing time to ensure the best quality. A slow internet connection can also affect upload speed.

Is an API available?

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Currently, there is no public API available. We are working on the possibilities of offering an API in the future.