A palindrome reads the same forwards and backwards — racecar, madam, “A man, a plan, a canal: Panama”. Checking one by eye is easy; checking a famous phrase with spaces, commas and accents is not, because the test only works once you strip everything that is not a letter. This palindrome checker does that cleaning for you: paste any word, phrase or paragraph and it gives two answers — whether the whole text works as one palindrome, and every palindrome word of 3+ letters hiding inside it.
Accents and punctuation are ignored, so Spanish classics like “Dábale arroz a la zorra el abad” pass exactly as they should. Everything runs in your browser. ¿Lo prefieres en español? Verificador de Palíndromos.
How the checker decides
The rule sounds simple — reverse the text and compare — but the cleaning is where checkers disagree. This one follows the convention used by every famous example: convert to lowercase, remove accents (á → a, ñ → n) by Unicode decomposition, and delete everything that is not a letter or a digit. Spaces, commas, colons and question marks simply do not exist for the test. That is why “Was it a car or a cat I saw?” passes, and why “Dábale arroz a la zorra el abad” — the best-known Spanish palindrome — cleans to the perfectly symmetrical dabalearrozalazorraelabad.
The second answer is the one most checkers skip: the tool also scans the text word by word and lists every palindrome of three letters or more — noon, anna, refer, otto — in the order they appear, duplicates removed. Teachers use it to grade palindrome hunts; writers use it to check a passage they suspect is hiding one.
Famous palindromes to try
Paste a few and watch the cleaned forms: “Never odd or even” — a phrase that is also true of itself. “Madam, in Eden, I’m Adam” — punctuation everywhere, still perfect. “Anita lava la tina” — the Spanish schoolyard classic. “A man, a plan, a canal: Panama” — the most quoted English sentence palindrome. And for a single-word challenge, detartrated (11 letters) is among the longest in everyday English, while reconocer holds the same honour in Spanish.
Palindromes in the classroom and in code
Palindromes are a favourite teaching device because the concept is instant and the edge cases are the lesson: case, accents and punctuation force you to define “same” precisely. The same edge cases appear in programming interviews, where “valid palindrome” is a standard exercise — the professional solution is exactly what this tool does: normalize first, then compare against the reverse. Number palindromes (12321, 2026-02-06 style dates) follow the same rule with digits kept, and this checker keeps digits for that reason.
Palindromic dates and names
The same symmetry hides in calendars: 12 February 2021 writes as 12/02/2021, a perfect digit palindrome in day-month-year order, and dates like that drew real celebrations in 2020 (02/02/2020, palindromic in both major formats). Names play too — Hannah, Ava, Otto, Anna — which is why palindrome hunts in a class list or a baby-name book never come back empty. Paste a date string or a list of names into the checker and let the scan do the hunting.
Frequently asked questions
Is a single letter a palindrome? Technically yes, but it tells you nothing — this checker only reports words of 3+ letters in the scan, and a whole-text test needs at least one letter or digit to pass.
Why did my phrase fail? Usually a silent letter difference: “nurses run” passes, but add one extra letter anywhere and symmetry breaks. The checker shows the cleaned string so you can spot the mismatch against its reverse.
Do accents matter? In the classic convention, no — á and a count as the same letter, which is what makes the great Spanish palindromes work.
What about palindromic numbers? They pass too: digits are kept during cleaning, so 12321 and 12/02/2021-style strings test exactly like words.
Related tools
Versión en español: Verificador de Palíndromos: palabras y frases que se leen igual al revés · Cliché Finder · Stop Words Remover.
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