Palindrome Checker

How to use

1. Enter Text — Type a word, phrase, or number
2. Instant Check — See if it reads the same forwards and backwards
3. Try More — Test different words and phrases

What Is a Palindrome?

A palindrome is a word, phrase, number, or sequence that reads the same forwards and backwards. The word comes from Greek: 'palin' (again) + 'dromos' (direction). Famous examples include "racecar," "madam," and "A man, a plan, a canal: Panama!"

How This Checker Works

The tool strips all non-alphanumeric characters (spaces, punctuation, special symbols) and converts the text to lowercase. It then compares the cleaned string with its reverse. If they match, it's a palindrome. This approach correctly handles phrase palindromes where spaces and punctuation create the sentence structure.

Types of Palindromes

• Word palindromes: Single words like "level," "radar," "noon," "civic."
• Phrase palindromes: Sentences that read the same: "Never odd or even."
• Number palindromes: Numbers like 12321, 1001, 45654.
• Name palindromes: Names like "Bob," "Anna," "Eve."

Palindromes in Programming

Checking for palindromes is one of the most common programming interview questions. It tests string manipulation, two-pointer techniques, and understanding of character encoding. This tool shows the cleaned and reversed versions so you can verify the logic visually.

Famous Palindromes

"Was it a car or a cat I saw?" • "Do geese see God?" • "Mr. Owl ate my metal worm" • "A Santa at NASA" • "Never odd or even" • "Step on no pets" • "Top spot" • "kayak" • "deified" • "rotator"

Privacy

All checking happens in your browser. Your input is never sent anywhere.

Want to reverse text in other ways? Try our Text Reverser. Need to count characters? Use the Letter Counter.

Frequently asked questions

What is a palindrome?

A palindrome reads the same forwards and backwards. Examples: 'racecar', 'madam', 'A man a plan a canal Panama'.

Are spaces and punctuation ignored?

Yes. The checker strips spaces, punctuation, and converts to lowercase before comparing. 'Race Car' is recognized as a palindrome.

Do numbers work?

Yes. Numbers like 12321 and 1001 are checked correctly.

What about sentences?

Sentences work too. 'Was it a car or a cat I saw?' is a famous sentence palindrome.

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