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Palindrome Checker

Check if a word or phrase reads the same forwards and backwards.

Try an example:

A man a plan a canal Panama Was it a car or a cat I saw racecar Never odd or even race a car hello

Ignore spaces Ignore punctuation Ignore case

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Enter text above

Original

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Cleaned (after options)

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Longest Palindromic Substring

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About Palindrome Checker

Palindrome Checker is a free online text utility that lets you check if a word or phrase reads the same forwards and backwards instantly in your browser. Writers, editors, students, and content creators use this tool daily to save time on repetitive text manipulation tasks. No data is sent to any server — everything is processed locally on your device.

How to Use

Paste your text Enter or paste the text you want to process into the input field. There's no length limit for most operations.

Choose your options Select any relevant options or modes to control how your text will be transformed.

Process the text Click the action button to transform your text. Results appear instantly in the output area.

Copy the result Click the Copy button to copy the transformed text to your clipboard, ready to paste anywhere.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Palindrome Checker?

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Save Hours of Manual Editing Palindrome Checker automates tedious text tasks that would take minutes or hours to do by hand. Process thousands of lines in a single click.

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Complete Privacy Your text is processed entirely in your browser. Nothing is sent to any server, stored, or logged. Close the tab and your data is gone.

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Copy-Paste Friendly Designed for the real workflow: paste your text, transform it, copy the result. No account required, no file uploads, no unnecessary steps.

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Works with Any Language Full Unicode support means Palindrome Checker handles English, Chinese, Arabic, emoji, and any other language or script correctly.

Frequently Asked Questions

A palindrome is a word, phrase, number, or sequence that reads the same forwards and backwards. Famous examples include "racecar," "level," "kayak," and phrases like "A man, a plan, a canal: Panama."

When these options are enabled, spaces and punctuation are stripped before checking. This allows phrases like "A man, a plan, a canal: Panama" to be recognized as palindromes, since "amanaplanacanalpanama" reads the same both ways.

This is the longest sequence within your input text that is itself a palindrome. For example, in "abacabadabacaba" the entire string is a palindrome, but in shorter mixed text the longest palindromic substring may be just a portion of the input.