Palindrome Checker - Test if Text is a Palindrome

A palindrome is a word, phrase, number, or sequence that reads the same forward and backward. The word comes from Greek: "palin" (again) + "dromos" (way). Examples include "racecar", "level", "A man a plan a canal Panama", and numbers like 12321.

To check if text is a palindrome: (1) remove spaces and punctuation if checking a phrase, (2) convert to the same case (usually lowercase), (3) compare the text to its reverse. If they match exactly, it's a palindrome.

For phrase palindromes like "A man a plan a canal Panama", spaces and punctuation are ignored. For strict character-by-character palindromes, every character including spaces must match when reversed. Most palindrome definitions ignore whitespace and punctuation.

Famous palindrome sentences include: "A man a plan a canal Panama", "Was it a car or a cat I saw", "Never odd or even", "Madam I'm Adam", "Able was I ere I saw Elba" (attributed to Napoleon), and "Do geese see God".

Yes. "Racecar" is one of the most well-known English palindromes. Spelled r-a-c-e-c-a-r, it reads identically forward and backward. Other common single-word palindromes include "level", "radar", "civic", "noon", "kayak", and "refer".

Yes. Numeric palindromes read the same forward and backward. Examples: 121, 1331, 12321, 1001. Palindrome dates also exist, such as 02/02/2020 (February 2, 2020 in MM/DD/YYYY format).

The longest commonly accepted English palindrome word is "tattarrattat" (12 letters), coined by James Joyce in Ulysses to represent a knock on a door. In standard dictionaries, "rotavator" (9 letters, a type of farming equipment) is often cited as the longest.

By default, palindrome checking is case-insensitive. "Racecar" and "racecar" are both considered palindromes because the letter comparison ignores capitalization. This tool allows you to toggle case sensitivity if you need strict matching.

A palindrome reads the same forward and backward as text. An ambigram is a visual design that can be read in more than one way — such as when rotated 180° or reflected. Some words (like "NOON") work as both.

No. All palindrome checking runs entirely in your browser using JavaScript. No text is transmitted to any server. When you close or refresh the page, your input is gone.

A palindrome is a word, phrase, number, or sequence that reads the same forward and backward. The word comes from Greek: 'palin' (again) + 'dromos' (way). Examples include 'racecar', 'level', 'A man a plan a canal Panama', and numbers like 12321.

To check if text is a palindrome: (1) remove spaces and punctuation if checking a phrase, (2) convert to the same case (usually lowercase), (3) compare the text to its reverse. If they match exactly, it's a palindrome.

For phrase palindromes like 'A man a plan a canal Panama', spaces and punctuation are ignored. For strict character-by-character palindromes, every character including spaces must match when reversed. Most palindrome definitions ignore whitespace and punctuation.

Famous palindrome sentences include: 'A man a plan a canal Panama', 'Was it a car or a cat I saw', 'Never odd or even', 'Madam I'm Adam', 'Able was I ere I saw Elba' (attributed to Napoleon), and 'Do geese see God'.

Yes. 'Racecar' is one of the most well-known English palindromes. Spelled r-a-c-e-c-a-r, it reads identically forward and backward. Other common single-word palindromes include 'level', 'radar', 'civic', 'noon', 'kayak', and 'refer'.

Yes. Numeric palindromes read the same forward and backward. Examples: 121, 1331, 12321, 1001. Palindrome dates also exist, such as 02/02/2020 (February 2, 2020 in MM/DD/YYYY format).

The longest commonly accepted English palindrome word is 'tattarrattat' (12 letters), coined by James Joyce in Ulysses to represent a knock on a door. In standard dictionaries, 'rotavator' (9 letters, a type of farming equipment) is often cited as the longest.

No. All palindrome checking runs entirely in your browser using JavaScript. No text is transmitted to any server. When you close or refresh the page, your input is gone.