What is Palindrome Checker?
Free online palindrome checker. Auto-detect if text reads the same forwards and backwards. Ignore spaces and punctuation, find the longest palindrome substring. Suitable for word games, coding interview prep, and education.
▶Use Cases4 scenarios
- ◆Word games
- ◆Coding interviews
- ◆Education
- ◆Fun challenges
▶How to Use4 steps
- 1Enter text to check
- 2Auto-detect palindrome
- 3View longest palindrome
- 4Copy result
▶Features4 features
- ✓Auto detection
- ✓Longest substring
- ✓Ignore spaces/punctuation
- ✓Free
▶FAQ7 questions
What is Palindrome Checker?
An online palindrome checker. Detect if text reads the same forwards and backwards.. Everything runs locally in your browser — no uploads.
What is a palindrome?
A palindrome reads the same forwards and backwards, like "racecar" or "madam".
Does it work with Chinese?
Yes, Chinese palindromes are supported too.
What errors can Palindrome Checker detect?
Checks if text is a palindrome (reads the same forwards and backwards), ignoring spaces and punctuation.
How large of a file can I validate?
Files up to 10MB work smoothly. Larger files may slow down your browser.
Is data uploaded to a server?
No. All validation happens locally in your browser. Data never leaves your device.
Can it auto-fix errors?
Cannot auto-fix, but can show the reversed text for comparison.