Regex Tester & Debugger – Instantly Test Your Regular Expressions

✅ What is a Regex Tester?

A Regex Tester is an online tool that helps you test and debug regular expressions (regex) in real-time. Whether you’re a developer, data analyst, or student, this tool lets you check your pattern against input strings, highlight matches, and refine your regex for accuracy.

🛠️ Features: Real-time Matching – See results as you type. Syntax Highlighting – Easily identify matched groups and patterns. Group Breakdown – View captured groups in a clear structure. Multi-line Support – Test across multiple lines of text. Export Results – Copy matches or export them as needed. 🚀 Why Use Our Regex Tester? Fast and lightweight — No unnecessary clutter. Beginner-friendly — Easy to start for regex learners. Powerful debugging — Spot errors and optimize expressions quickly. Mobile responsive — Test regex on any device. 🧠 Common Use Cases: Validating email, phone numbers, or URLs Extracting specific data from text Search and replace in code or documents Filtering logs and JSON content Form input validation 📚 Helpful Examples: Try these patterns to get started: Match an email: ^[\w.-]+@[\w.-]+\.\w{2,}$ Validate a phone number: ^\+?\d{10,15}$ Extract domain from URL: https?:\/\/(www\.)?([\w\-\.]+) 🔒 Your Data is Safe We respect your privacy. No input or pattern is stored or logged — all regex tests run in your browser locally. ✅ Start using the Regex Tester now and make regular expressions easy to manage!

Regex Tester & Debugger

Regular Expression

Test String

Match Results

No matches found

Regex Cheatsheet

Character Classes

  • . Any character except newline
  • \w Word character: [A-Za-z0-9_]
  • \W Not word character
  • \d Digit: [0-9]
  • \D Not digit
  • \s Whitespace
  • \S Not whitespace

Anchors

  • ^ Start of string
  • $ End of string
  • \b Word boundary
  • \B Not word boundary

Quantifiers

  • * 0 or more
  • + 1 or more
  • ? 0 or 1
  • {n} Exactly n
  • {n,} n or more
  • {n,m} Between n and m

Groups & Lookaround

  • (...) Capturing group
  • (?:...) Non-capturing group
  • (?=...) Positive lookahead
  • (?!...) Negative lookahead
  • (?<=...) Positive lookbehind
  • (? Negative lookbehind
Matches Found 0
Groups 0
Flags -

Leave a Reply

Your email address will not be published. Required fields are marked *

Scroll to Top