How to use the palindrome checker
- 1 Type a word, phrase or number, or a list with one item per line.
- 2 Keep Ignore spaces, punctuation and case on for phrases, or turn it off for a strict character check.
- 3 Read each result: green lines are palindromes, and each shows the cleaned text and its reverse.
- 4 Tick Also find palindrome words inside each line to spot words like level or noon in longer text.
Finding and writing palindromes
Start palindrome sentences from the middle and build outwards. To see any text backwards, use Reverse Text, and to compare two words letter by letter, the Anagram Checker.
- Put each test on its own line to check a list.
- Write dates without separators to check them.
- Turn off the ignore option for strict checks.
Features
Many at once
Check a whole list, one line each.
Clear working
Shows the cleaned letters and the reversed version.
Finds hidden palindromes
Lists palindrome words of three or more letters inside each line.
When to use it
Homework and puzzles
Check palindrome answers for school tasks and word puzzles. To compare two words letter by letter, use the Anagram Checker.
Programming practice
Test examples when writing a palindrome function, a common coding exercise.
Number patterns
Check palindromic numbers and dates, such as 12021 or 22/02/2022.
Creative writing
Test your own palindrome sentences as you write them. To flip text backwards, use Reverse Text.
Related Text tasks
Frequently asked questions
What is a palindrome?
A palindrome reads the same forwards and backwards. Words such as level, radar and racecar are palindromes, as are numbers like 1221 and phrases such as Never odd or even.
Why are spaces and punctuation ignored?
Phrase palindromes only work when spaces, commas and capitals are ignored. A man, a plan, a canal: Panama becomes amanaplanacanalpanama, which is the same reversed.
Can I check numbers and dates?
Yes. Type a number or a date written without separators. With punctuation ignored, 02/02/2020 is checked as 02022020.
Can I check many words at once?
Yes. Put each word or phrase on its own line, and every line gets its own result.
What counts as a palindrome word inside a line?
Words of three or more letters that read the same backwards, such as eye, noon, level or civic, are listed. Single letters and two-letter words are skipped to avoid clutter.
What is the longest palindrome word in English?
Tattarrattat, coined by James Joyce, is often cited, and rotator and redivider are well-known everyday examples.
Does it handle accents?
With the accents option on, é is treated as e, which helps with words borrowed from other languages.
What is a palindromic date?
A date that reads the same backwards when written as digits, such as 22/02/2022 written as 22022022. Different date formats, such as month first, give different palindromic dates, so check the format you use.
Why is palindrome checking a common coding exercise?
It teaches string handling, reversing, cleaning input and comparing values. This checker is handy for testing expected answers, including tricky cases with spaces, capitals and punctuation.
Is my text uploaded?
No. The checking happens in your browser, so the text never leaves your device.
How this tool works. These text tools run entirely in your browser with plain JavaScript, so the text you paste never leaves your device and results update as you type. Each tool is tested with real text such as copied PDFs, emails, code, lists, emojis and non-English scripts before it goes live.
Built and reviewed by Hamza Farooq, founder and lead developer
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