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Chapterize

by yileme · github.com/yileme/zotero-chapterize

Previews and splits a book PDF into chapters by its bookmarks or page ranges you enter.

Chapterize has Atlas grade B (use with care) because a zotero:// link (a web page can open one) can make it install add-ons without asking you (from zotero-plugin-toolkit), and 1 more finding. It works with Zotero 7–9, not the current Zotero 10. Last checked 6 Nov 2026.

Files, sync & backupImport & metadata
View source
Downloads a .xpi file (1.0 MB). In Zotero, open Tools → Plugins and install it from the file.
In useAn estimate of how many copies of Zotero have it: Zotero downloads each new version once for every copy that has the plugin, so we count the downloads of its most-downloaded recent release. Rounded. Plugins that update from outside GitHub count low.
11
DownloadsAll-time downloads of its release files from GitHub, counting every update. Installs from elsewhere aren't counted.
20
ReleasesVersions published on GitHub. Everyone who has the plugin downloads each one again, which adds up in Downloads.
12
StarsPeople who starred the repository on GitHub: a rough measure of interest.
1
ContributorsPeople who have committed code to the repository.
1
LicenceThe licence the code is published under, as GitHub reports it.
AGPL-3.0
B
Atlas gradeUse with care
because a zotero:// link (a web page can open one) can make it install add-ons without asking you (from zotero-plugin-toolkit), and 1 more finding
Applies to v0.2.27, released 13 Aug 2026Code checked · not yet tested in a live Zotero
Doesn't work with the current Zotero (10)Works with Zotero 7, 8, 9.
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 repository (under its old name)The update address offers version 0.2.27, which isn't newer than this one, so Zotero won't update it for now
Where your data goesOnly contacts services we could identify1 address in 1 group.LowLow concern: normal for plugins that do this job. Listed so you know.
Scholarly services (1)
api.crossref.org
Where we found it
api.crossref.orgcontent/scripts/chapterize.js · line 115445
var API = "https://api.crossref.org/works";
Powerful capabilitiesA zotero:// link (a web page can open one) can make it install add-ons without asking you, and 2 moreMediumMedium concern: worth reading before you install. One medium finding makes the grade B.
Medium concern (2)
A zotero:// link (a web page can open one) can make it install add-ons without asking you (from zotero-plugin-toolkit)A zotero:// link can make it run code if you approve a prompt (from zotero-plugin-toolkit)
Low concern (1)
Works with files on your computer
Where we found it
A zotero:// link (a web page can open one) can make it install add-o…content/scripts/chapterize.js · line 95611

zotero://plugin. zotero-plugin-toolkit removed this link in version 6.0.0; this plugin is built with an older version

Services.io.getProtocolHandler("zotero").wrappedJSObject._extensions["zotero://plugin"] = pluginBridgeExtension;
A zotero:// link can make it run code if you approve a promptcontent/scripts/chapterize.js · line 95567

zotero://ztoolkit-debug

Services.io.getProtocolHandler("zotero").wrappedJSObject._extensions["zotero://ztoolkit-debug"] = debugBridgeExtension;
Before you installShown, not gradedFacts to help you decide. They don't change the grade.
Works withZotero 7, 8, 9 · not 10, 11 betaDoesn't work with the current Zotero (10)MediumMedium concern: worth reading before you install. One medium finding makes the grade B.
Zotero 7 ✓ worksZotero 8 ✓ worksZotero 9 ✓ worksZotero 10 ✗ doesn't workZotero 11 beta ✗ doesn't work
What you'll needZotero 7, 8, 9Detected automatically from its code
No further detail for this area yet.
MaintenanceActive · last release 13 Aug 20261 contributor
No further detail for this area yet.
LanguagesDocumentation in English and ChineseInterface: English 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

Previews and splits a book PDF into chapters by its bookmarks or page ranges you enter. Each chapter becomes a linked Book Section item with its own PDF, with DOIs and authors filled from Crossref.

Citing or reading one chapter of an edited book otherwise means cutting the PDF yourself and typing the chapter's metadata. This does the split and fills in details, with a preview before anything is written.

What you'll need

Detected automatically
  • Zotero 7, 8, 9Not working with Zotero 10

Where your data goes

We found: only contacts services we could identify. 1 address in 1 group.

Scholarly services (1)
api.crossref.org
Evidence · file and line
api.crossref.orgcontent/scripts/chapterize.js · line 115445
var API = "https://api.crossref.org/works";

Other plugins that do this

Matched on what they do

For the same job, work with Zotero 10 and graded B or better. Closest match first.

  • A
    Zotero Book Splitter

    Splits PDF and EPUB books into separate chapters, each as its own citable Zotero item, while keeping the complete original.

    Matches “split book into chapters” · 316 downloads · Active · Zotero 9–10
    Works with Zotero 10Can use a local model
  • B
    Estravon

    Adds a right-click command to extract a page range of a PDF to Markdown, attached to the item, using the Marker API through a backend server.

    Matches “split pdf sections” · 525 downloads · Active · Zotero 7–10
    Works with Zotero 10
Compare all 3 side by side
How we pick these

By how closely what they do matches this plugin, using descriptions and the phrases people search with. Copies and forks of this plugin are listed under Forks and copies instead. No plugin pays to appear here.

Forks and copies

No forks listed.

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

Ratings and reviews

What people who use it say. This is separate from the grade, which is what the code does, and never changes it.

No ratings yet.

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Install Chapterize
BUse with care
Before you install: A zotero:// link (a web page can open one) can make it install add-ons without asking you (from zotero-plugin-toolkit), and 1 more finding.Read the finding
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