🪞 Palindrome Checker
Check if a word, phrase, or sentence is a palindrome. Ignores spaces, punctuation, and case.
About the Palindrome Checker
This palindrome checker runs entirely in your browser. Type any word, phrase, or sentence, click Check, and the tool tells you instantly whether it reads the same forwards and backwards. Nothing is uploaded — the comparison happens locally with JavaScript.
What counts as a palindrome
A palindrome is a piece of text that reads the same forward and backward. To make the check meaningful, this tool normalizes the input by:
- Converting all letters to lowercase.
- Removing spaces, punctuation, and other non-alphanumeric characters.
- Comparing the cleaned text to its reverse.
So "A man, a plan, a canal: Panama" is recognized as a palindrome because the cleaned form "amanaplanacanalpanama" reads the same in both directions.
Examples
racecar— palindromeWas it a car or a cat I saw?— palindromeNo 'x' in Nixon— palindromehello— not a palindrome
Frequently asked questions
Does this tool upload my text? No. All checks happen locally in your browser. Your text never leaves your device.
Are numbers supported? Yes. Numeric digits are kept during cleaning, so sequences like "12321" are evaluated correctly.
What about non-English characters? The tool keeps alphanumeric characters in any script and compares their code points. Some scripts may need additional normalization to detect palindromes reliably.
Is there a length limit? The only limit is your browser's available memory. Even very long phrases are checked instantly.