Citation Need Detector

Paste an essay draft and an AI model in your browser lists claims that need a source and wording that overstates evidence.

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Interactive Tool

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Enter your values once it appears to see your results.

How Citation Need Detector works

Press Load model once: your browser downloads Gemma 3 1B instruction-tuned (web build) (728 MB) from this site and keeps it in its cache. Then add your text and press Classify locally. The model runs on this device using your graphics card, so nothing you enter is sent to a server. Until the model is loaded, or if your device cannot run it, the tool falls back to a simple keyword check and labels the result as the fallback.

Gemma 3 1B instruction-tuned (web build) is a small open language model from Google. The tool sends it the instruction below plus your text, asks for a JSON answer with fixed fields, and shows each field as a card. It runs at temperature 0, so the same input gives the same answer on the same device, though different graphics cards can word it slightly differently.

Inputs longer than 6,000 characters are cut to that length before they reach the model, and the result says so. The model only sees what you paste: it does not look anything up.

The instruction also carries one worked example: the built-in sample with the answer the larger Gemma 4 E2B model gave for it. That example is what lets this smaller model follow the answer format reliably.

The instruction the model gets

You help a student check which sentences in their writing need a citation. A claim needs a citation when it gives a statistic, a date-specific fact, a research finding, a cause-and-effect claim, or a quote. Widely known facts (water boils at 100 C at sea level, Paris is the capital of France) and the writer's own opinion clearly marked as opinion do not. Flag absolute words such as always, never, all, proves. Do not invent sources, authors, studies or URLs; only describe the kind of source to look for.

What it returns

  • Claims that need a source: Each claim that needs a citation, written as 'claim → why it needs a source'.
  • Fine without a source: Claims that are common knowledge or clearly the writer's opinion.
  • Overstated wording: Absolute or exaggerated words or phrases copied from the text, with a softer alternative.
  • Kinds of source to look for: The type of source that would support each claim (government statistics, peer-reviewed study, news report and so on). No names or links.

Worked example

The model's output for the built-in sample, recorded on a desktop browser. Your run may word things slightly differently.

Essay paragraph: Teen sleep deprivation has increased sharply since smartphones became common, and schools that start later always improve student grades.
Claims that need a source
Teen sleep deprivation has increased sharply since smartphones became common → This is a claim about a trend that needs supporting evidence, likely from a study or report.
Fine without a source
Teen sleep deprivation is a recognized issue
Overstated wording
schools that start later always improve student grades
Kinds of source to look for
research study

The model

The files are served from this site, versioned so a cached copy is never stale. Nothing is fetched from a third party while you use the tool.

You can switch models in the tool. Also available: Gemma 4 E2B instruction-tuned (web build) (2.0 GB). The larger language model gives more thorough answers but is a bigger download and needs a stronger device.

ModelDownloadRuns onLicence
Gemma 3 1B instruction-tuned (web build)700 MBGraphics card (WebGPU)Gemma Terms of Use
Gemma 4 E2B instruction-tuned (web build)2.0 GBGraphics card (WebGPU)Apache-2.0

Gemma is provided under and subject to the Gemma Terms of Use found at ai.google.dev/gemma/terms.

Limitations

  • Small language models make mistakes: they can miss an item, merge two, or state something more confidently than the text supports. Check the result against your input before you rely on it.
  • It needs WebGPU and about 4 GB of memory, so it is offered on desktops and laptops, not on phones and tablets. Devices that cannot run it get the keyword fallback, clearly labelled.
  • Results describe the input you gave, not the real-world situation behind it. Review them yourself before acting.

Good uses

  • Triage education and study notes before deeper review
  • Prepare consistent labels for repeat workflows
  • Reduce manual sorting on small batches
  • Keep sensitive drafts in the browser preview

Frequently Asked Questions

Common questions about the Citation Need Detector

No. The model files download from this site once, and then everything runs in your browser tab. The text you enter is never sent to a server, and closing the tab discards it.