Free Hallucination Detector
Paste in AI-generated writing and get a checklist of the facts, quotes, and citations to verify before you publish, with fabrication patterns flagged.
What to verify
Free from the team behind Typeahead. The autocomplete for your whole Mac.
Get TypeaheadWhat is a hallucination detector?
A hallucination detector is a tool that checks AI-generated text for fabricated facts, quotes, statistics, or citations that sound plausible but aren't real. Unlike a plagiarism checker, which looks for copied content, a hallucination detector looks for content that was invented outright, a known failure mode of large language models.
Why It Matters
AI models don't just get facts wrong. They invent sources that don't exist.
This isn't a rare glitch. According to Stanford HAI's benchmarking of legal AI research tools, purpose-built products from LexisNexis and Thomson Reuters still produced incorrect information between 17% and 34% of the time on legal queries, while general-purpose chatbots hallucinated between 58% and 82% of the time on the same tasks. Citing an AI-generated fact without checking it is a real risk, not a hypothetical one.
Source: Stanford HAI, “AI on Trial: Legal Models Hallucinate in 1 out of 6 (or More) Benchmarking Queries”
Where it matters
Research papers citing AI-assisted drafts, legal filings, journalism, and business reports where a single invented fact can undermine the whole piece.
Scans AI-generated text for claims, quotes, and citations, and flags anything that can't be verified against a real source.
How It Works
Three steps, no learning curve.
Paste AI-generated text
Drop in a draft, summary, or answer produced by an AI tool.
We check the claims
Facts, quotes, and citations get checked against real, findable sources.
Review what's flagged
See exactly which claims couldn't be verified before you publish or submit.
A Different Way In
Nothing to verify if nothing was invented.
Typeahead doesn't generate facts, quotes, or sources for you. It completes the sentence you're already writing, so there's nothing fabricated to check afterward.
Typeahead completes your sentences, not your thoughts. It suggests the next few words as you type, in your own apps, in your own rhythm. You stay the author.
Hallucination Detector
Common questions.
Yes. It's built as a free tool, no sign-up and no subscription, the same way we build everything else at Typeahead.
A fabricated fact, quote, statistic, or citation that an AI model generated but that doesn't correspond to anything real. It's different from a simple mistake or outdated information: the AI effectively made it up and stated it with full confidence.
No hallucination detector can catch every fabrication, especially on obscure or recent topics. Treat flagged results as a starting point for verification, not a final answer.
It checks text from any AI model, not just one specific tool.
Same answer as everything we build: your text is used to generate your result, not sold, shared, or used to build a profile of you.
More Free Tools
The rest of the toolbox.
Want AI help while you write, not just after?
Typeahead completes your sentences in your own voice, right where you're already typing.
Mac only. One-time purchase. Runs offline.