Free Teacher Utility
AI Content Checker
Paste text or upload a document to check for signs of AI generation — a clear, honest signal in seconds. Self-hosted and private: text is never sent to a third-party AI provider.
How AI detection works — and its limits
AI text detectors look for statistical fingerprints, not a signature. AI-generated text tends to be statistically "average" — predictable word choices, uniform sentence lengths, few contractions. Human writing is messier: rhythm shifts, word choice gets personal, punctuation is inconsistent. This tool measures those patterns and combines them into a score — but that approach has real limits, so read both columns below, not just the score.
What it measures
- Sentence-length variance
- Vocabulary richness
- Punctuation variety
- Common AI phrasing ("It's important to note...")
- Contraction usage
- Repetition and word-pattern uniformity
Where it falls short
- Can be fooled by lightly-edited AI text
- Can misjudge formal or terse writing as AI-like
- Non-native-English writing is a known false-positive source
- Short samples (under 150 words) are less reliable
- Never proof — a starting point, not a verdict
How It Works
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Paste text into the box, or upload a .docx or .pdf file.
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Click Check Text — analysis runs in seconds, entirely on our own servers.
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Read the plain-language result and the disclaimer alongside it, not just the percentage.
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Optionally expand Details, or export a PDF report of the result.
Why Use Doxad's AI Content Checker
Self-Hosted, Private by Design
Text is analyzed on our own servers, never forwarded to an external AI provider — the point of self-hosting in the first place.
Honest, Non-Alarmist Results
A plain-language band and a visible disclaimer, every time — not a red "CAUGHT" banner. This is a signal, not a judgment.
Paste or Upload
Check pasted text directly, or upload a .docx or .pdf and let us extract the text for you.
No Sign Up Required
Free to use for single checks — no account needed.
Frequently Asked Questions
Is this tool proof that a text was written by AI?
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No. It's a signal, not a verdict. AI detection — from any tool, including commercial ones — can be wrong in both directions: it can miss AI-written text and flag human-written text. Use it as one input alongside your own judgment, not a final decision.
Why does it sometimes flag human writing as AI-generated?
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Detection works by measuring statistical patterns like sentence-length variation and vocabulary choice. Very formal, simple, or non-native-English writing can share those patterns with AI text, which is a well-documented source of false positives across AI detectors generally. Treat a flagged result as a prompt to look closer, not as evidence on its own.
Is my text stored or sent to a third party?
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No. Text is sent server-side to our own self-hosted detector and analyzed in memory — it isn't stored anywhere, and it isn't sent to OpenAI, Google, or any other outside AI provider.
Do I need an account to use this?
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No. Paste text or upload a file and check it immediately — no sign up required.
What file types can I upload?
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Word documents (.docx) and PDFs (.pdf) up to 10MB. Text is extracted automatically before checking.
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