What is a palindrome?

A palindrome is a word, phrase, number, or sequence of characters that reads the same forwards as it does backwards, such as 'racecar' or 'A man a plan a canal Panama'.

Why should I ignore spaces and punctuation?

Classic palindromic phrases like 'A man, a plan, a canal: Panama' are only palindromes when spaces and punctuation are removed. Enable those options to catch such phrases.

What is the longest palindromic substring?

This is the longest contiguous sequence of characters within your input that forms a palindrome. It is found using a center-expansion algorithm.

Does it check individual words?

Yes, for multi-word input the tool splits the text into individual words and checks each one separately, displaying a pass/fail badge for every word.

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Palindrome Checker

Check if a word or phrase reads the same forwards and backwards, with options to ignore case and punctuation.

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About this tool

Enter any word or sentence to instantly find out if it is a palindrome. Toggle options to ignore spaces, punctuation, and letter case for flexible matching. The tool also finds the longest palindromic substring within your input, checks each word individually, and lets you try famous palindrome examples.

How to use

1 Type or paste text into the input field.
2 Toggle the options to ignore spaces, punctuation, and/or letter case as needed.
3 View the result badge — 'Palindrome' or 'Not a Palindrome' — along with the reversed text.
4 Scroll down to see the longest palindromic substring, word-by-word results, and famous examples to try.

Frequently Asked Questions

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