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Hallucination Severity Scorer — Free Online Tool

Not just yes/no — how bad is this hallucination?

Score hallucination severity 0-100. Fabricated data, wrong attribution, plausible-but-false, minor detail errors.

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Hallucination severity scorer

Score LLM hallucinations by severity — not just yes/no.

How to use this tool

  1. 1

    Paste AI output

    The response you want to evaluate.

  2. 2

    Paste reference facts

    Ground truth — what should be true.

  3. 3

    Get severity breakdown

    Contradictions, fabrications, attribution errors, severity score.

Frequently Asked Questions

What is hallucination severity?
Not all hallucinations are equal. Fabricating a citation is severe. Getting a minor date wrong is minor. Misstating a person's role matters more than misstating their hobby. Severity score helps you prioritize fixes.
How is the score computed?
We check for: (1) direct contradictions with reference, (2) fabricated entities (names, numbers) not in reference, (3) attribution errors (wrong source), (4) hedging vs false confidence, (5) structural integrity (does output follow asked format?). Each weighted.
Can this replace manual review?
No — it's a triage tool. It surfaces likely problems. Critical-domain AI outputs (medical, legal, financial) always need human review. Use this to prioritize which outputs need that review.

Key Takeaways

  • Hallucination Severity Scorer is a free, browser-based ai tool — not just yes/no — how bad is this hallucination?.
  • No signup, no downloads, no file uploads — your data stays on your device.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Hallucination Severity Scorer

  1. Open the tool: Launch Hallucination Severity Scorer on Toololis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

Hallucination Severity Scorer — Quick Facts

Price
Free — no limits, no watermarks, no paywalls
Privacy
100% browser-based — no data is sent to any server
Platform
Any modern browser on desktop, tablet, or mobile
Category
AI Tools on Toololis
Offline
Works offline after first visit (Progressive Web App)
FeatureDetails
ToolHallucination Severity Scorer
CategoryAI
Signup RequiredNo
File UploadNone — processed in browser
Mobile SupportFully responsive
CostFree forever

Why Use Hallucination Severity Scorer?

You should try Hallucination Severity Scorer for a quick, private way to not just yes/no — how bad is this hallucination?. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.