🔄 Palindrome Checker

Check if words or sentences are palindromes. The tool automatically ignores spaces, punctuation, and capitalization to detect true palindromes. Perfect for word games, linguistic analysis, and text validation.

Enter Text to Check:

Is this a palindrome?

Type something to check...

Characters

Clean Chars

Words

📝 Cleaned Text (for comparison):

(Cleaned version will appear here)

💡 How it works:

Enter any word or sentence in the textarea
The tool removes spaces, punctuation, and ignores case
Compares the cleaned text with its reverse
If they match, it's a palindrome (✅)
If they don't match, it's not a palindrome (❌)
Results update in real-time as you type

📝 Examples:

Text	Cleaned	Result
racecar	racecar	✅ Palindrome
A man, a plan, a canal: Panama	amanaplanacanalpanama	✅ Palindrome
madam	madam	✅ Palindrome
level	level	✅ Palindrome
hello	hello	❌ Not a Palindrome
Was it a car or a cat I saw?	wasitacaroracatisaw	✅ Palindrome

📚 Use Cases:

Word games and puzzle solving
Linguistic and language analysis
Educational activities for learning
Text validation and pattern recognition
Cryptography and data encoding projects
Testing algorithms and data structures
Creative writing and poetry composition

ℹ️ What is a Palindrome? A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward (ignoring spaces, punctuation, and capitalization). Famous examples: "racecar", "madam", and "A man, a plan, a canal: Panama".

Cleaning first, then comparing

A palindrome test on raw text would fail on almost every real phrase, because capitals, spaces and punctuation are not symmetric. The checker normalises the text before it compares anything:

clean   = lowercase(text) with everything but a-z and 0-9 removed
verdict = clean === reverse(clean)   and clean is not empty

A man, a plan, a canal: Panama cleans to amanaplanacanalpanama - 21 characters that read identically in both directions, so the answer is yes. The Clean Chars figure tells you how much survived the strip; Characters counts what you actually typed, spaces included. You can copy the cleaned string if you want to check it elsewhere.

What counts and what does not

Digits are kept, so 12321 and dates like 02/02/2020 (cleaned to 02022020) are tested as written.
Accented and non-Latin letters are removed, not folded. The e-acute in Ésope reste ici et se repose is stripped rather than turned into a plain e, so this checker is reliable for English only.
Nothing left means no verdict. Type only punctuation and you get "Invalid" rather than a false yes - an empty string technically reverses to itself, which is not a useful answer.
Every keystroke rechecks, so you can edit a phrase until it balances.

Single letters and repeated characters like aaa pass. Any string of one character is a palindrome by definition.

Frequently asked questions

Is "A man, a plan, a canal, Panama" a palindrome?

Yes. Ignore case, spaces and punctuation and it reads the same both ways. Leigh Mercer published it in 1948; longer versions of the same joke run to hundreds of words.

What is the longest palindromic word in English?

Tattarrattat, coined by James Joyce in Ulysses for a knock at the door, at twelve letters. Among everyday words the winners are redivider and detartrated at nine and eleven.

Can a number be a palindrome?

Yes, and digits are checked here alongside letters. 1221 and 90109 both pass, and so does a phone number or a date once its separators are stripped.