Free Tool

DOI Lookup

Enter a DOI to get paper metadata and formatted citations in APA, MLA, Chicago, IEEE, or BibTeX.

Enter DOI
Paste a DOI, DOI URL, or doi: prefixed identifier
Example DOIs

Enter a DOI to get started

We'll fetch the paper metadata and generate citations in your preferred format.

Writing a paper?

TypeTeX manages your citations automatically. Import from Zotero, cite with AI, and never format a bibliography again.

Try TypeTeX Free

About DOI Lookup

A DOI (Digital Object Identifier) is a unique alphanumeric string assigned to digital content like academic papers, datasets, and reports. DOIs provide a permanent link to content even if the URL changes.

This free tool looks up DOIs using the CrossRef API and generates properly formatted citations. Supported citation styles include APA 7th Edition, MLA 9th Edition, Chicago, IEEE, and BibTeX for LaTeX users.

For automatic citation management with AI-powered suggestions, try TypeTeX—a modern writing platform that handles references for you.

DOI Lookup | TypeTeX | TypeTeX