---
title: How to Convert a DOI to BibTeX - Free Tool | Scholar Sidekick
description: Enter a DOI, PubMed ID, PMCID, ISBN, arXiv ID, ISSN, ADS bibcode, or paper URL and get a formatted BibTeX entry. Free tool. No signup required.
doc_version: "1.0"
last_updated: "2026-05-18"
---

# Convert a DOI to BibTeX

> HTML version: https://scholar-sidekick.com/tools/doi-to-bibtex

Paste a DOI (or any supported identifier: PMID, PMCID, ISBN, arXiv ID, ISSN, ADS bibcode, or scholarly URL) and get a clean BibTeX entry resolved against authoritative registries (Crossref, PubMed, arXiv, DataCite, OpenLibrary, ADS, WHO IRIS).

## What this tool does

Takes one identifier and returns a single BibTeX entry. The metadata is fetched live from the registry the identifier belongs to, so the title, authors, journal, volume, year, and pages match what the publisher has on file - not what a third-party scraper inferred from a landing page.

## How to use

1. Open [the tool](https://scholar-sidekick.com/tools/doi-to-bibtex).
2. Paste the identifier into the input.
3. Copy the BibTeX entry, or download it as a `.bib` file.

## Programmatic access

The same conversion is exposed via the [`POST /api/export`](https://scholar-sidekick.com/docs) endpoint (`format: "bibtex"`) and the [scholar-sidekick MCP](https://scholar-sidekick.com/mcp) `exportCitation` tool. Anonymous access is free with a published rate limit.

## Related tools

- [DOI to RIS Converter](https://scholar-sidekick.com/tools/doi-to-ris) - same identifier surface, RIS output for EndNote / Zotero / Mendeley import
- [PMID / PMCID / DOI Converter](https://scholar-sidekick.com/tools/pubmed-id-converter) - swap between PubMed identifier types
- [Citation Verifier](https://scholar-sidekick.com/tools/citation-verifier) - check that a claimed citation matches the paper at its identifier
- [Free tools index](https://scholar-sidekick.com/tools) - all citation tools

## Sitemap

See the full [sitemap](https://scholar-sidekick.com/sitemap.md) for all pages.