About the Palindrome Checker
A palindrome reads the same forwards and backwards. The everyday definition ignores spaces, punctuation and capital letters, which is why 'A man, a plan, a canal: Panama' counts even though the raw characters differ. This checker shows you the exact comparison it made, so the answer is never a mystery.
How to use the Palindrome Checker
- Type or paste a word, sentence or number.
- Leave strict mode off for the normal definition that ignores case and punctuation.
- Turn strict mode on when every space and comma must match too.
- Read the verdict and the cleaned string the tool compared.
Why use this tool?
Two comparison modes
Relaxed matching for phrases, strict character-for-character matching for puzzles and code tests.
Word-level detection
Highlights individual palindromic words inside a longer sentence, such as level, radar and civic.
Numbers too
Works on numeric palindromes like 12321 and on dates such as 02/02/2020.
Frequently asked questions
Is a single letter a palindrome?
Technically yes — any one-character string reads the same in both directions — but most word lists require at least three letters to count it as interesting.
What is the longest palindrome word in English?
'Tattarrattat', coined by James Joyce, is often cited at 12 letters. Among everyday words, 'rotator' and 'racecar' are the common examples.
Does capitalisation matter?
Not in normal mode. 'Racecar' and 'RaceCar' both pass. Turn on strict mode if you need an exact byte-level match.