What is a palindrome?

A palindrome is a string that reads the same forward and backward, ignoring spaces, punctuation, and capitalization. Examples include 'racecar', 'madam', 'A man, a plan, a canal, Panama', and 'Never odd or even'.

Does your palindrome checker support multiple languages?

Yes, it supports any Unicode characters including Chinese, Arabic, and other scripts. You can choose to ignore case, spaces, and punctuation for flexible detection.

What is a longest palindromic substring?

The longest palindromic substring is the longest contiguous segment within a string that is itself a palindrome. For example, in 'babad', the longest palindromic substring is 'bab' or 'aba'.

Is the palindrome checker free?

Yes, this palindrome checker is completely free to use. It runs entirely in your browser with pure frontend JavaScript. No data is uploaded to any server, ensuring your privacy.

Free Palindrome Checker

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Updated: 2026-07-11

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📖 About Palindromes

Definition

A palindrome reads the same forward and backward, ignoring spaces, punctuation, and case

Examples

"racecar", "madam", "level", "radar", "civic", "kayak", "refer", "tenet"

Famous Phrases

"A man, a plan, a canal, Panama", "Never odd or even", "Was it a car or a cat I saw"

Applications

Coding interviews, string algorithms, DNA sequence analysis, data validation

📝 Palindrome Checker