Text · Wordplay

Palindrome Checker

Is it a palindrome? Type any word, phrase or sentence and find out instantly — with the reversed text, strict and relaxed matching, and the longest palindromic substring highlighted.

racecar A man, a plan, a canal: Panama Never odd or even Was it a car or a cat I saw? Step on no pets Madam, I'm Adam
It's a palindrome!

Longest palindromic substring

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Breakdown

🔎 Relaxed or strict

Relaxed mode ignores case, spaces and punctuation. Turn it off for a strict character-by-character comparison.

🔍 Longest detection

Finds the longest palindromic substring inside your text automatically, and marks where it appears.

↔ Reversed preview

See your text mirrored back instantly so the comparison is easy to verify by eye.

⚡ Live results

No buttons to press — the verdict updates as you type, with sample classics one click away.

More handy tools

Count characters, sort lines or convert text to different cases.

Char Count Text Sorter