Palindrome checker
Type a word or a sentence and find out whether it reads the same forward and backward: spaces, punctuation, and accents don't count.
Cleaned-up version used for the comparison:
How the check works
Before the comparison, the text is "normalized": every letter becomes lowercase, accents are stripped (so "é" and "e" count as the same letter), and spaces, apostrophes, and punctuation disappear. That's the convention used in wordplay: "A man, a plan, a canal: Panama" becomes amanaplanacanalpanama, which reads exactly the same backward. The cleaned-up text is then compared character by character against its reversed copy. It works with numbers too: 12321 is a palindrome, and so are symmetric dates like 02/02/2020.
Famous palindromes in English
Among single words: racecar, level, kayak, rotator, madam. Among sentences, beyond the classic one about Panama, wordplay enthusiasts have crafted little masterpieces like "Never odd or even" and "Was it a car or a cat I saw?". Composing palindromic sentences that actually make sense is considered one of the hardest challenges in recreational linguistics: every letter you add on the left locks in its mirror image on the right.