Palindrome Checker

Check if a word, number, or sentence is a palindrome, with letter-by-letter breakdown.

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How it works

Type a word, number, or sentence. The tool strips spaces and punctuation, converts to lowercase, and compares the string with its reverse. If they match, it's a palindrome. A visual breakdown shows the mirrored character pairs so you can see why it works (or which character breaks the mirror). Numbers are also supported — a numeric palindrome reads the same forwards and backwards. All processing happens in your browser.

Common use cases

  • Verifying palindrome words or sentences for a word game or puzzle.
  • Checking whether a number (like a year or phone number) is a palindrome.
  • Teaching the concept of palindromes interactively.

Frequently asked questions

Are spaces and punctuation ignored?

Yes — for the purpose of the check, spaces and non-alphanumeric characters are stripped. So "A man a plan a canal Panama" correctly registers as a palindrome.

Is the check case-sensitive?

No. The comparison is case-insensitive, so "Racecar" and "racecar" both pass.

Does this work for numbers?

Yes. Enter a number like 12321 and the tool checks if it reads the same forwards and backwards.