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Palindrome Checker

Type or paste any text to check whether it reads the same forwards and backwards, ignoring spaces, punctuation and case.

Try A man, a plan, a canal: Panama or 12321. Spaces, punctuation and case are ignored, only letters and digits are compared.

30 characters · 21 letters and digits kept

Rule: text is lowercased, then only a to z and 0 to 9 are kept. That normalized string is compared to its reverse. For example amanaplanacanalpanama reads the same forwards and backwards.
All checks run in your browser. No data is sent to a server. Change text on the left and the result on the right updates instantly.
VerdictPalindromeReads the same both ways
Normalized (letters and digits only, lowercase)amanaplanacanalpanama21 characters compared, reversed below should match
Reversed normalizedamanaplanacanalpanamaMirror of the normalized text

"A man, a plan, a canal: Panama" reads the same both ways when letters, digits and case are compared: amanaplanacanalpanama.

Enter text on the left, result updates live on the right. All checks stay in your browser.

HOW TO USE

  1. 1Type or paste any text on the left.
  2. 2See the verdict update live on the right, palindrome or not.
  3. 3Spaces, punctuation and case are ignored, only letters and digits are compared.
  4. 4The normalized comparison on the right shows exactly what was checked.

EXAMPLE

INPUT

A man, a plan, a canal: Panama

OUTPUT

Palindrome, reads the same backwards: amanaplanacanalpanama

FAQ

What exactly gets compared?
Only letters and digits, case insensitively. Spaces, punctuation and symbols are ignored.
Can numbers be checked too?
Yes, enter a number like 12321 and it is evaluated the same way.
Does it ignore spaces and punctuation?
Yes, the clean mode strips spaces, punctuation and casing before checking. Toggle it off for strict character by character matching.
What languages does it support?
Any language that uses Unicode characters such as English, Hindi, Chinese, Arabic and more.

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String Reverser↗Case Converter↗Word Counter↗Roman Numeral Converter↗