Article Scanner
Editor Simulation
Enter any Wikipedia article title below. This tool fetches
the article using the real Wikipedia API, extracts all
references, normalizes URLs, DOIs and ISBNs, and reports
which ones appear more than once in the article.
Try these:
Marta (footballer)
Covid-19
Brazil national football team
Python (programming language)
Fetching article...
Error:
| Metric | Value | Notes |
|---|---|---|
| Total references found | — | All <ref> tags extracted from article wikitext |
| Duplicate groups detected | — | — |
| References affected | — | These could be merged or reused |
No duplicate references found.
All references in this article are unique.
This simulates how the duplicate reference checker would work
inside the Wikipedia Visual Editor while an
editor is actively editing. Load a real Wikipedia article,
then click Cite and enter a URL that already
exists in the article to see the duplicate alert.
Loading article references...
Load an article above to begin editing
Once loaded, click Cite in the toolbar
to add a new reference. If the reference already exists
in the article, a duplicate alert will appear.
References currently in this article
(0) —
these are checked when you add a new reference
Add a Reference
As you type, this tool checks if the reference already
exists in the article.