Balanced Parentheses Regex Pattern
Matches innermost balanced parentheses groups. Note: regex alone cannot match nested groups — use recursive patterns or parsers.
Live Regex Tester
Pattern Breakdown
Code Examples
JavaScript
const regex = /\([^()]*\)/g; const test = "(hello world)"; console.log(regex.test(test)); // true // Extract matches const matches = test.match(regex); console.log(matches);
Python
import re pattern = r'\([^()]*\)' test = "(hello world)" match = re.findall(pattern, test) print(match) # Found!
Go
package main
import (
"fmt"
"regexp"
)
func main() {
re := regexp.MustCompile(`\([^()]*\)`)
fmt.Println(re.MatchString("(hello world)")) // true
}Common Use Cases
Match Examples
| Input | Result |
|---|---|
| (hello world) | Match |
| ((unclosed) | No Match |
About the Balanced Parentheses Regex
Matches innermost balanced parentheses groups. Note: regex alone cannot match nested groups — use recursive patterns or parsers.
Regular expressions (regex) are powerful pattern matching tools used across virtually all programming languages. The balanced parentheses pattern is classified as intermediate difficulty in the advanced patterns category. It works in all major programming languages.
When using this regex, always consider edge cases and test thoroughly with real-world data. Use the interactive tester above to validate the pattern against your specific inputs before deploying to production.
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Frequently Asked Questions
What is the Balanced Parentheses regex pattern?
Matches innermost balanced parentheses groups. Note: regex alone cannot match nested groups — use recursive patterns or parsers.
How do I use the Balanced Parentheses regex?
Use the pattern /\([^()]*\)/g in your code. In JavaScript: new RegExp('\([^()]*\)', 'g'). Test it above with your own input.
What does this Balanced Parentheses regex match?
This pattern matches: "(hello world)". It does NOT match: "((unclosed)". Expression parsing, code analysis, mathematical expressions.
Is the Balanced Parentheses regex beginner-friendly?
This pattern is rated Intermediate. It uses some advanced features like character classes and quantifiers.
What languages support the Balanced Parentheses regex?
This pattern works in all major programming languages including JavaScript, Python, Java, C#, Go, Ruby, PHP, and more. Syntax may vary slightly between regex engines.
Can I modify the Balanced Parentheses regex for my use case?
Yes! Use the interactive tester above to modify the pattern and test with your own data. Common modifications include making it case-insensitive (add 'i' flag), matching globally (add 'g' flag), or adjusting character classes.
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