Palindrome Checker

A palindrome checker tests whether text reads the same forwards and backwards. By convention, the comparison ignores spaces, punctuation and letter case — which is what lets the famous "A man, a plan, a canal: Panama" qualify: strip it to amanaplanacanalpanama and it mirrors perfectly.

That normalization step is exactly what's hard to do by eye. Simple words (level, racecar, kayak) you can check mentally; a 30-character phrase with commas and capitals, you can't — and one overlooked letter invalidates the whole thing.

Type a word, phrase or number and get an instant verdict: palindrome or not, using the standard rules (letters and digits compared, case and punctuation ignored).

Uses beyond curiosity: writers and puzzle constructors verify candidate palindromes before publishing them; teachers build word-play and logic exercises; programmers check test cases for the classic string-reversal interview problem; and date enthusiasts test numeric dates (02/02/2020 was a rare universal palindrome across date formats). Famous ones to try: "Was it a car or a cat I saw?", "No lemon, no melon", "Never odd or even".

Checking is instant and local to your browser — experiment freely.