Palindrome Checker

Check if text is a palindrome and find the longest palindromic substring

Processed client-side in your browser — files never leave your device.
Free, with no signup, account, or usage limits.
Works on any modern browser, including mobile.

About this tool

Palindrome Checker is a free online utility to check if text is a palindrome and find the longest palindromic substring (related: palindrome, text, check). Processing runs locally in your browser — your input is not uploaded to ThothBox.

How to use

Open Palindrome Checker and paste or type your input.
Choose any options that affect the output.
Run the tool or watch the live result update.
Copy or download the output.

FAQ

What does Palindrome Checker do?

Check if text is a palindrome and find the longest palindromic substring.

Is Palindrome Checker private?

Yes for typical use: input is processed in your browser and is not uploaded to ThothBox.

Is Palindrome Checker free?

Yes. It is free to use with no signup required.

How do I use Palindrome Checker?

Open the Palindrome Checker tool, then open Palindrome Checker and paste or type your input.

Palindrome Checker

About this tool

How to use

FAQ

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