siutil. DOI/ISBN to Citation
processed in your browser · never uploaded

DOIs / ISBNs

One identifier per line. DOI (10.xxxx/…) or ISBN (10 or 13 digits). Paste a doi.org URL and it still works.

References

A tool for anyone who wants to turn a DOI or ISBN straight into a reference. Paste paper DOIs (e.g. 10.1038/nphys1170) or book ISBNs (10 or 13 digits, hyphens are fine), one per line, press Convert, and it looks up the metadata — author, year, title, journal, volume, issue, pages, publisher — from a public database and formats the reference in APA (7th), MLA (9th), IEEE, SIST 02 (the Japanese standard), BibTeX or RIS. DOIs are resolved through CrossRef and ISBNs through Google Books, both without any sign-in. Paste several identifiers to build a whole bibliography in one pass. Switching the format re-renders what was already fetched, so you can output the same reference as both APA and BibTeX without looking it up again. The BibTeX and RIS output drops straight into LaTeX or reference managers such as EndNote, Mendeley and Zotero. On privacy: the only thing sent to a server is the DOI/ISBN identifier you type — no images, PDFs or manuscripts are ever uploaded, and lookups go from your browser directly to the public APIs. It is the companion to the manual Citation Formatter (citation): use this when you have an identifier, and the formatter when you want to assemble a reference from details you already have. Note that available fields depend on the source record, and each style has finer rules (italics, abbreviating long author lists, DOI formatting), so check the final list against your venue's or institution's guidelines before submitting. Fetching metadata from an arbitrary URL is not supported — use a DOI or ISBN.

How to use

  1. Paste paper DOIs (10.xxxx/… or a doi.org URL) or book ISBNs (10 or 13 digits), one identifier per line.
  2. Pick the format in the toolbar (APA / MLA / IEEE / SIST 02 / BibTeX / RIS) and press Convert.
  3. The formatted references appear on the right. Click Copy and paste them into your bibliography or reference manager. Only the identifier is sent.

FAQ

Are the DOIs/ISBNs or any file uploaded?

To fetch the metadata, only the DOI/ISBN identifier you enter is sent from your browser directly to a public API (CrossRef for DOIs, Google Books for ISBNs). No images, PDFs or manuscripts are ever uploaded. An identifier just names a published work — it is not personal information like a name or contact detail.

Which identifiers are supported? Can I use any URL?

Paper DOIs (identifiers starting with 10., or a doi.org URL) and book ISBNs (10 or 13 digits, hyphens allowed). Fetching metadata from an arbitrary web page URL is not supported, because browsers cannot read most pages directly. To cite a URL, use the manual Citation Formatter (citation) instead.

Which formats are supported? Can it output BibTeX or RIS?

APA (7th), MLA (9th), IEEE and SIST 02 (the Japanese standard), plus BibTeX and RIS. BibTeX drops into LaTeX, and RIS imports into EndNote, Mendeley, Zotero and similar managers. Changing the format does not re-fetch — it re-renders the records you already looked up in the new style.

Can I convert several references at once?

Yes. Paste one DOI or ISBN per line and press Convert to look them all up and format them together — handy for building a whole bibliography. Any line that cannot be found is flagged on its own line and does not affect the others.

Why might a lookup fail or a field be missing?

If the identifier is not in the source database, or the record there lacks fields such as volume, issue or pages, those parts are simply left blank. Each style also has finer rules (italics, abbreviating many authors), so check your final bibliography against the required style guide or a sample before submitting.