Palindrome Checker
Test words, phrases and numbers for being palindromes, with a clear visual breakdown.
Try: racecar · madam · 12321 · Never odd or even
Frequently Asked Questions
What is a palindrome?
A palindrome reads the same forwards and backwards, like "racecar", "madam", or the phrase "A man, a plan, a canal: Panama" when spaces and punctuation are ignored.
Why does my phrase fail with strict settings?
In strict mode every character counts, including spaces and capitalisation. Turn on the ignore options to check the letters only, which is how classic phrase palindromes are judged.
Can numbers be palindromes?
Yes. 121, 1221 and 12321 are numeric palindromes. Enable "include numbers" so digits are kept during the check.
What is the longest check supported?
There is no practical limit; even a full page of text is checked instantly in your browser.
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