10 free verifications — no card required

Reference checking that takes minutes, not days

Built for medical writers who need to verify clinical claims fast. RefCheckr finds the exact quote, checks the numbers, and flags overclaims — so you can build reference packs faster and with confidence.

Try RefCheckr → How it works

Example verification

"Semaglutide 2.4 mg significantly reduced cardiovascular events in adults with obesity."

◐ Overclaim

…A 20% reduction in MACE was observed in the semaglutide group; however, the trial was not powered to assess cardiovascular outcomes as a primary endpoint…

Suggested: "…was associated with a reduction in cardiovascular events, though the trial was not powered for this endpoint."

See RefCheckr in action

Watch a claim get verified in seconds, then see the annotated PDF it produces.

Live demo

Annotated PDF export

How it works

Two tools, one workflow

RefCheckr fits into your existing reference-checking process. Verify claims you've already written, or find references for claims that need support.

Verify a Claim

Check whether a specific claim is accurately supported by its cited reference.

Paste the claim you need to check
Upload up to 10 reference PDFs
Get a verdict with highlighted passages and page locations
Download annotated PDFs or listen to an audio brief

Find References

Search multiple databases for evidence that supports a clinical claim.

Enter the claim you need references for
Choose your sources — PubMed, trials, labelling
Get results ranked by relevance with explanations
Load more results with broadened search terms

Data sources

Search across four databases

RefCheckr queries established biomedical infrastructure directly — shows the exact passage and page location so you can verify in seconds.

article

PubMed

36 million citations from biomedical literature. Results ranked by relevance to your claim with AI-generated assessments.

science

ClinicalTrials.gov

Trial registrations with status, phase, enrollment, and sponsor data. Find the trial behind the paper.

medication

US Drug Labelling

US Prescribing Information via DailyMed and OpenFDA. Check approved indications, dosing, and safety data.

local_pharmacy

UK SmPC

UK Summary of Product Characteristics via the electronic Medicines Compendium (eMC). Check licensed indications and dosing.

Verdicts

Five levels of evidence support

Every verification returns a clear verdict with the exact passage, page location, and a plain-language explanation.

What we check: claim wording, endpoints, population, effect size and units, and whether the reference actually supports the level of certainty.

↑ Tap a verdict to learn more

Under the hood

Built on real infrastructure

Not a wrapper around a chatbot. RefCheckr combines structured AI analysis with direct database access.

Analysis LLM-assisted claim verification and overclaim detection

Literature PubMed / NCBI via PubCrawl

Trials ClinicalTrials.gov API

Labelling DailyMed + OpenFDA + eMC (UK SmPCs)

PDF Page, column & line-level extraction

Output Annotated PDF with verdict summary

Your data

Privacy by design

delete

PDFs are not stored Uploaded files are processed in memory and discarded after analysis.

visibility_off

No extracted text retained Text content is used for the verification step only and not persisted.

lock

Private by default Your claims and results are never shared, indexed, or used for training.

manage_accounts

You control your data Delete your account and all associated data at any time.

Learn how RefCheckr handles data →

lock HTTPS Encrypted delete No Data Retention block Not Used for Training

"I would be happy to say that a document I had written had been written with the aid of RefCheckr."

Kelly Drake, PhD

Medical Writer, EMWA Member — Kelly Drake Medical Writing

Pricing

Simple pricing

One plan. Everything included.

Pro

£29 / month

Unlimited claim verifications
Upload up to 10 PDFs per verification
PubMed, ClinicalTrials.gov, DailyMed & eMC search
Annotated PDF exports with verdict summaries
Audio briefs for every verification

Get started →