Chicago Reference Generator (Author-Date)
Paste a DOI or ISBN for instant lookup, or enter details manually. Generates correctly formatted in-text citations and an alphabetized reference list. Fully usable on mobile.
Paste a DOI or ISBN, we'll build the reference for you
DOI works for journal articles via CrossRef. ISBN works for books via Open Library. A general webpage can't be auto-fetched this way, use manual entry for those instead.
Alphabetized by author, with real hanging indents. Add references from lookup, manual entry, or batch results.
How to Use the Chicago Reference Generator
From a DOI, an ISBN, or a set of source details to a ready Author-Date citation. Fully usable on mobile.
DOI lookups go to CrossRef, ISBN lookups go to Open Library, both directly from your browser. No account, no tracking, nothing stored in between.
Chicago Style Reference Page Generator, Free and Online
A Chicago style reference page generator turns a DOI, an ISBN, or a set of source details into a properly formatted Author-Date reference and in-text citation instantly. This one looks up journal articles via CrossRef and books via Open Library, then generates a hanging-indented reference list entry alongside the matching in-text citation.
Chicago referencing has a complication most other styles don't, there are actually two separate systems, Notes-Bibliography with footnotes for the humanities, and Author-Date with in-text citations for the sciences and social sciences, and they are not interchangeable. This free Chicago style reference generator tool covers the Author-Date system specifically, in-text citations like (Smith 2024) paired with an alphabetized reference list. Paste a DOI for a journal article and CrossRef fills in the author, title, journal and volume, or paste an ISBN for a book and Open Library fills in the title, author and publisher. For webpages, switch to manual entry and the fields adjust accordingly. Every reference comes with the correct hanging indent already applied. Pro Mode adds support for up to 10 authors, an alphabetized bibliography compiler, and export to Word or Markdown.
1Simple vs Pro, What Each Mode Includes
| Feature | Simple Mode | Pro Mode (Free) |
|---|---|---|
| DOI lookup via CrossRef, ISBN lookup via Open Library | Included | Included |
| Manual entry for webpages, journals, books | Included | Included |
| Reference list entry with real hanging indent | Included | Included |
| Author-Date in-text citation, with page locator | Included | Included |
| Up to 10 authors on one entry | Limited to 3 authors | Included |
| Batch DOI generator, up to 10 at once | Not included | Included |
| Alphabetized bibliography compiler, export to Word or Markdown | Not included | Included |
2Chicago Author-Date, Quick Examples
The detail most people get wrong going in is assuming there's just one Chicago citation format, when it's really two distinct systems living under one name. Author-Date, the one this tool builds, is what most sciences and social sciences courses actually want, no comma before the year, and no p. or pp. before a page number when quoting directly, just the number itself after a comma. Notes-Bibliography, the footnote-based system, is a different animal entirely and this tool is not built for it, if a course asks for footnotes specifically, that's the system you need instead.
3Where Chicago Style Actually Came From
The Chicago Manual of Style has an origin that has nothing to do with academic citation at all. According to the manual's own official history, it began in the 1890s as a single sheet of typographic rules written by a proofreader at the University of Chicago Press, meant only to keep the press's own compositors and typesetters consistent. That sheet grew into a pamphlet, and by 1906 the pamphlet had become a 200-page book, still focused entirely on typesetting, capitalization, italics and punctuation, not a citation system in any form. The Author-Date and Notes-Bibliography citation systems people now associate with the name Chicago were built into the manual gradually, across many later editions, which means the reference generator on this page is drawing on rules added long after the manual's original purpose had already changed.
| Question | Quick Answer |
|---|---|
| What system does this tool generate? | Author-Date, not Notes-Bibliography |
| How is the reference page ordered? | Alphabetically by author surname, hanging indent |
| When did the manual first appear as a book? | 1906, as a 200-page typesetting guide |
| Was it originally about citations? | No, it was purely a typography style sheet |
DOI lookups go to CrossRef and ISBN lookups go to Open Library, both free public registries, directly from your own browser, with no account and no tracking. Manually entered details are never sent anywhere.
4Frequently Asked Questions
Grounded in the Chicago Manual of Style's own documented 1890s to 1906 origin as a typesetting guide, not the assumption that Chicago has always been a citation system. The full account is detailed on the manual's official about page. For other citation styles on this site, see the MLA Referencing Generator and the full SmallStudyTools.com tool library.
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