Free tool
Spanish AI Detector
Check Spanish text for AI — essays, articles, homework, applications. The detector reads the statistical fingerprint of the writing itself, so it works on Spanish exactly as it does on English: paste the text, get sentence-level AI scores. Free, no sign-up for your first scan.
Paste your Spanish text here.
Sentence-level highlighting shows exactly which parts score as AI — funciona igual de bien en español.
Free scan · sentence-level highlighting · no sign-up for your first check
Why AI detection works across languages
AI detectors don't look words up in an English dictionary — they measure how machine-typical the writing is: how predictable each word choice is, how uniform the sentence rhythm runs, how often model-favorite connectors appear. Spanish AI text has its own version of every tell English readers now recognize — además, sin embargo, en conclusión, cabe destacar doing the work of "moreover" and "it's important to note" — plus the same suspiciously even paragraph structure. Those patterns are exactly what the detector scores, in any major language.
Who uses the Spanish AI checker
- Teachers and profesores — spot-check Spanish essays and homework with sentence-level evidence, then apply the fair process from our teacher's guide.
- Students — verify your own work reads as yours before submitting, especially if you used AI tools for research or outlines.
- Editors and publishers — screen Spanish-language submissions and translations before publication.
Writing in Spanish and need the reverse? The AI humanizer rewrites AI-generated Spanish into natural prose, and the AI percentage checker gives you a document-level score.
Frequently asked questions
Does the AI detector work on Spanish text?
Yes. The detector analyzes the statistical patterns of the writing itself — word-choice predictability, sentence rhythm, machine-typical phrasing — and those signals exist in Spanish exactly as they do in English. Paste Spanish text and you get the same sentence-level AI scores.
Can it detect ChatGPT written in Spanish?
Yes. ChatGPT, Claude, and Gemini produce Spanish with the same statistical fingerprints as their English output — uniform rhythm, predictable connectors (además, sin embargo, en conclusión, cabe destacar), and tidy structure. The detector scores those patterns directly.
Is this Spanish AI checker free?
Yes — your first scan needs no sign-up, and a free account adds 3 credits plus one more every day. Pro removes the limits and unlocks Ultra mode and 5,000-word documents.
Does it handle accents and Spanish punctuation?
Fully. Accented characters (á, é, í, ó, ú, ñ, ü) and Spanish punctuation (¿ ¡) are processed as normal text — paste directly from Word, Google Docs, or a PDF without cleanup.
How accurate is AI detection on Spanish text?
Accuracy on well-formed Spanish prose is comparable to English: the statistical tells of machine generation carry across languages. As with any language, very short texts and heavily edited AI output are harder calls — 300+ words gives the most reliable result, and no detector should be treated as courtroom proof.
Can teachers use this for Spanish essays?
Yes — paste a student essay and read the sentence-level highlighting to see which passages score as AI-generated. Use it as one signal alongside your knowledge of the student's writing, never as sole proof; our teacher guide covers a fair process.