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Find out if text was
written by AI.

Paste any text and get a 0–100% AI probability score, a plain-English verdict, and sentence-level highlighting of the exact phrases that triggered detection.

No account required 1,000 words per check Works on any AI model Nothing stored
Paste text. Find out if AI wrote it.
0 / 1,000 words
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AI Score
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Analyzed text — highlighted sentences show the strongest AI signals
Your analyzed text will appear here with AI-flagged sentences highlighted.
How it works

What AI writing actually looks like

AI models produce text with consistent, detectable patterns. Forgely's detector identifies six of the most reliable signals.

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Uniform sentence length

AI writes sentences of similar length throughout a passage. Human writers vary naturally — short punches, long explanations, fragments.

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Filler transitions

"Furthermore," "Moreover," "In conclusion," "It is important to note" — AI overuses these formal connectors that real writers avoid.

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Latinate vocabulary

AI prefers "utilize" over "use", "facilitate" over "help", "demonstrate" over "show". The longer, more formal synonym is consistently chosen.

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Missing contractions

AI writes "it is" not "it's", "do not" not "don't". Human writers use contractions naturally in almost every register except legal or academic.

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Parallel structure overuse

AI builds prose that reads like disguised bullet points — lists of parallel clauses with the same grammatical structure, repeated across paragraphs.

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Precise hedging language

"It is worth noting that," "This highlights the importance of," "Taken together, these findings suggest" — predictable framing AI uses to appear measured.

Using the detector

Three steps to a result

No account, no extension, no setup. Just paste and go.

1

Paste the text

Copy the text you want to check — an essay, email, article, product description, or any other passage. Paste up to 1,000 words.

2

Click Detect AI Writing

Forgely analyzes the text for AI linguistic patterns using Claude, one of the most capable language models available.

3

Read the score

Your 0–100 AI probability score, a plain-English verdict, and the exact sentences that triggered detection — highlighted in orange.

Got AI-written text you want to fix?

The AI Writing Polisher rewrites AI drafts to sound natural — fixing the same patterns the detector flags.

Try the AI Writing Polisher →
Questions

You probably want to know…

How accurate is Forgely's AI detector?
Accurate on clearly AI-generated text — it reliably flags the linguistic patterns AI models produce consistently. It is less reliable on short texts (under 100 words) and on text that has been heavily edited after generation. For best results, paste 150 words or more.
What AI models can it detect?
Forgely detects AI writing patterns regardless of the source model. It works on text from ChatGPT (GPT-3.5, GPT-4, GPT-4o, GPT-5), Claude (Claude 3, Claude 4), Google Gemini, Microsoft Copilot, Llama, Mistral, Grok, and any other large language model — because it analyzes the text patterns, not a digital fingerprint.
What does the AI probability score mean?
It's a 0–100 percentage showing how strongly the text exhibits AI writing patterns. 0–30 = reads like human writing with few AI signals. 31–60 = mixed signals, not conclusive. 61–100 = strong, consistent AI writing characteristics. The highlighted sentences show which specific parts drove the score.
Is it free?
Yes. Completely free — no account, no subscription, no credit card. Paste up to 1,000 words and get instant results.
Does Forgely store the text I paste?
No. Your text is sent directly to the AI for analysis and is not stored on any server. It passes through once, generates a result, and is discarded. No databases, no training on your content.
Can the AI detector be fooled?
Yes — all AI detectors can be. Heavily edited AI text, very short passages, and text written to mimic human patterns will score lower. Use the result as one data point, not a verdict. A 90% score is strong evidence; a 40% score is ambiguous.
How is this different from GPTZero or Originality?
Forgely is completely free with no account or subscription required. GPTZero and Originality.ai require accounts and charge for bulk use. Forgely also shows exactly which sentences triggered detection with visible highlighting, making the reasoning transparent — not just a number.