“racecar” backwards is still “racecar” — easy. But is “Was it a car or a cat I saw?” a palindrome? Checking longer phrases by eye is slow and error-prone. The new Palindrome Checker answers instantly and shows its working.
What it does
- Instant check as you type, for words, phrases, and numbers.
- Ignore case and ignore punctuation toggles for phrase palindromes.
- Compared vs reversed shown side by side so you see why.
- Palindrome words listed, plus the longest palindrome found inside.
Why it matters
Palindromes are a staple of puzzles, teaching, and coding practice — and the answer for a phrase depends entirely on how you treat case and punctuation. To explore famous examples and the logic behind checking, read our palindrome guide, or flip any string with the Text Reverser.
Free, and private
The Palindrome Checker is free and runs entirely in your browser — nothing you type is uploaded or stored.
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Frequently Asked Questions
Does it handle full phrases?
Yes. With the ignore-case and ignore-punctuation toggles on, phrases like 'A man, a plan, a canal: Panama' are recognised as palindromes. Turn the toggles off for a strict character-for-character check.
What extra does it show?
Beyond a yes/no, it shows the exact characters compared and their reverse, lists individual palindrome words, and finds the longest palindromic substring inside your text.
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