How to test if a string is a palindrome

1. Paste any word or phrase

   Type or paste text into the Text field. Punctuation, spaces, and letter case do not affect the verdict.

2. Understand the normalisation

   Only [a-z0-9] survive: the tool lowercases the input, strips everything else, then compares with its reverse. "A man, a plan, a canal: Panama" becomes "amanaplanacanalpanama".

3. Press Run

   The result returns isPalindrome (true/false) and the normalised string so you can see exactly what was compared.

4. Watch the edge cases

   Empty strings and single characters return true. Non-Latin scripts (Arabic, CJK) collapse to empty after normalisation, so they also return true.