Palindrome Checker
Paste numbers to test whether they read the same forwards and backwards, e.g. 12321 / 4554 / 90009. "Ignore signs and decimal points" also flags -4554 and 1.1 as palindromes.
Comparison Mode:
Output:
Min Length:
Separator:
Statistics Result
Download CSV
| Original | Digits | Reversed | Palindrome? |
|---|
Introduction to the tool and how to use it
A palindrome number reads the same forwards and backwards, such as 12321, 4554, 90009, 10001. Paste a whole batch of numbers at once; the tool checks each one and lists the results in a table, handy for checking lottery numbers, IDs, answers, or math practice.
Note: the tool compares characters one by one, so leading zeros count in the check and 007 is not a palindrome; to ignore leading zeros, pad or strip zeros with a dedicated tool first.
Note: the tool compares characters one by one, so leading zeros count in the check and 007 is not a palindrome; to ignore leading zeros, pad or strip zeros with a dedicated tool first.
How to use
- Paste the numbers to check into the input box; commas, spaces, line breaks, or any symbol can separate them.
- Choose the checking rule:
· Ignore signs and decimal points — strip minus signs, decimal points, and other non-digit characters before comparing, so -4554 counts as a palindrome and 1.1, 12.21 count too;
· Strict character match — compare as-is, so -4554 and 1.1 do not count as palindromes. - Set minimum digits — numbers with fewer digits are skipped entirely (enter 5 to consider only numbers with 5 digits or more).
- Choose output content: list all / palindromes only / non-palindromes only.
- Tick keep unique if needed.
- Set separator if needed — the default \\n means one per line.
- Click start; results go to the text box and the table below (original / digits / reversed / palindrome?). In the table, the original and reversed values can each be copied with one click, and the whole table can be downloaded as CSV.
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