Zotero Plugins Atlas
Plugins / Organising & tags

Zoplicate

by ChenglongMa · github.com/ChenglongMa/zoplicate

Catches duplicates the moment you import and asks whether to keep the new copy, the old one or both, then merges without losing attachments or notes.

Organising & tags
View source
Downloads a .xpi file (0.1 MB). In Zotero, open Tools → Plugins and install it from the file.
StarsPeople who starred the repository on GitHub: a rough measure of interest.
997
DownloadsAll-time downloads of its release files from GitHub. Installs from elsewhere aren't counted.
970,386
ContributorsPeople who have committed code to the repository.
9
LicenceThe licence the code is published under, as GitHub reports it.
AGPL-3.0
A+
Atlas gradeRecommended
because every code check came out low, and our live test in Zotero found nothing unexpected
Applies to v5.1.1, released 28 Aug 2026Code checked · tested installed in Zotero 10.0.3 on 27 Sep 2026
What we found in the codeSets the gradeThe worst finding in these three areas sets the grade.
Code transparencyReadable code, uploaded by the project's automated GitHub buildThe release file was uploaded by the project's automated GitHub build. We haven't yet rebuilt it from the source to compare.LowLow concern: normal for plugins that do this job. Listed so you know.
Updates
Updates come from this project's GitHub repositoryThe update address offers this version
Where your data goesNo web requests foundLowLow concern: normal for plugins that do this job. Listed so you know.
No further detail for this area yet.
Powerful capabilitiesWorks with files on your computer, and 1 moreLowLow concern: normal for plugins that do this job. Listed so you know.
Works with files on your computerlowLow concern.Keeps its own database filelowLow concern.
Before you installShown, not gradedFacts to help you decide. They don't change the grade.
Works withZotero 9, 10 · not 11 betaUpdates automatically
Zotero 9 ✓ worksZotero 10 ✓ worksZotero 11 beta ✗ doesn't work
What you'll needNothing extra detectedDetected automatically from its code
No further detail for this area yet.
MaintenanceActive · last release 28 Aug 20269 contributors
No further detail for this area yet.
LanguagesDocumentation in EnglishInterface: Afrikaans, Arabic, Bulgarian, Breton, Catalan, Czech, Danish, German, Greek, English, Spanish, Estonian, Basque, Persian, Finnish, French, Galician, Hebrew, Croatian, Hungarian, Indonesian, Icelandic, Italian, Japanese, Khmer, Korean, Lithuanian, Mongolian, Norwegian Bokmål, Dutch, Norwegian Nynorsk, Polish, Portuguese, Romanian, Russian, Slovak, Slovenian, Serbian, Swedish, Tamil, Thai, Turkish, Ukrainian, Vietnamese and Chinese
No further detail for this area yet.
We report what we found in the code. Open any area for the evidence.How we gradeReport a problem

What it does

Written by AI from the README

Catches duplicates the moment you import and asks whether to keep the new copy, the old one or both, then merges without losing attachments or notes. Also bulk-merges existing duplicates and remembers false positives.

Zotero's duplicate pane works only after the fact, one pair at a time, so large libraries pile up duplicates that are tedious to clean.

What you'll need

Detected automatically

We haven't detected any setup requirements. That isn't the same as none: check the developer's README.

Where your data goes

We found: no web requests found.

Forks and alternatives

No forks listed.

Plugins for the same job

The developer's response

The developer hasn't responded. Developers can reply here, and their reply sits next to our findings.I'm the developer
Install Zoplicate
A+Recommended, tested in Zotero
  1. 1Download the plugin fileDownload v5.1.1.xpi · 0.1 MB
  2. 2In Zotero, open Tools › Plugins
  3. 3Click the gear, choose Install Plugin From File… and pick the file
Step-by-step guide with pictures