Our free Palindrome Checker tool tests whether your text reads exactly the same forwards and backwards - in other words, whether it is a palindrome. By default it checks the whole text at once and shows true or false in the Output, while the Line-by-line Mode checks every non-empty line separately. Whatever you enter stays on your device - nothing is sent to, or saved on, any server.

The two ignore options make the check practical for real sentences instead of single words. With both ticked (the default), phrases such as A man, a plan, a canal: Panama are recognized as palindromes even though their spaces, punctuation and capital letters do not mirror perfectly.

1. Enter your text: Type or paste it into the Input textarea, click "Load an example", or upload a text file from your device.

2. Choose the options: Tick Line-by-line Mode to check every line separately, and set the two ignore options to match how strict you want the check to be.

3. Check: Click the "Check Text" button. In the default mode the Output shows a single true or false; in Line-by-line Mode it shows one result row per line.

4. Save the result: Use the Copy link below the Output textarea or the Download link to keep the verdicts.

Copy any of these into the Input box and hit "Check Text" - every entry below returns true with both ignore options ticked. The quick picks are single words, followed by funny English sentences and favorites from around the world.

For an extra experiment, untick "Ignore spaces & punctuation" and watch the sentence cards flip to false. Palindrome fans take this game far: American comedian Demetri Martin composed a whole poem that reads the same line by line in both directions, and French writer Georges Perec once published "Le Grand Palindrome", a 5,566-word palindrome.

FAQ 1: What is a palindrome?
Answer: A palindrome is a word, phrase, number or sequence of characters that reads the same forwards and backwards. Examples include "radar", "madam", "12321" and the sentence "Was it a car or a cat I saw?".

FAQ 2: Why does my sentence show true when its characters do not mirror exactly?
Answer: The two ignore options are ticked by default. They compare only the letters and numbers, regardless of case, so everyday sentences like "A man, a plan, a canal: Panama" are recognized as palindromes. Untick them if you want an exact character-for-character comparison.

FAQ 3: What does the Line-by-line Mode output look like?
Answer: Each non-empty line is followed by a right arrow and its verdict, for example "radar → true". Empty lines are skipped, and the message under the buttons tells you how many lines are palindromes.

FAQ 4: How do I perform a strict check?
Answer: Untick both "Ignore letter case" and "Ignore spaces & punctuation". Then every capital letter, space, digit and symbol must appear in mirror position for the result to be true.

FAQ 5: Does the checker work with numbers, symbols and emoji?
Answer: Yes. Digits are compared like letters, and multi-byte characters such as emoji are handled correctly because the tool reverses whole characters, not raw bytes. When "Ignore spaces & punctuation" is ticked, symbols are skipped in the comparison.

FAQ 6: Is my text sent to a server?
Answer: No. The checking is done on your own device in the browser, and nothing you enter is transmitted to, or stored on, any server.