Paste an article page URL and resolve it to its DOI through Crossref. Free, no sign-up.
What this tool does
Links rot: article URLs change when publishers redesign their sites, but DOIs do not. A reference that carries only a publisher URL will eventually point nowhere; the same reference with a DOI stays resolvable forever. This resolver takes an article URL, extracts any DOI already hiding in it, and otherwise queries Crossref for the page’s record, returning the DOI you should have cited in the first place.
Why it matters
Good citations do quiet work. They let a reader find every source you used, they show that your argument rests on real evidence rather than memory, and they protect you: a clean reference list is much harder to challenge than a vague one. Most marks lost on referencing are not lost on difficult sources. They are lost on small, repeated slips — a missing year, a swapped initial, a title in the wrong case — that a quick tool pass catches before submission.
How to use it
- Paste the article page URL.
- Click Resolve to DOI.
- Replace the bare URL with the DOI in your reference.
Worked example
URL ‘https://www.nature.com/articles/s44221-024-00001-x’ contains no DOI string, but Crossref resolves the article to DOI 10.1038/s44221-024-00001-x. A URL that already contains ‘doi.org/10.1/abc’ resolves instantly without any lookup.
Tips for good results
After resolving, cite the DOI alone. A DOI plus a publisher URL in one reference is redundant, not safer.
Work from the source itself, not from another paper’s copy of it. And keep one style for the whole list: a single mixed entry undermines an otherwise perfect bibliography.
Honest limits
Resolution works best when the URL is the publisher’s article page; repository mirrors, PDF links and search-result URLs may resolve to the wrong record or none. The tool extracts DOIs embedded in URLs directly and otherwise relies on Crossref’s URL filter, which is only as complete as publisher deposits.
Common mistakes to avoid
Common mistakes to avoid: copying a reference from another paper without checking it against the original, trusting a PDF filename for the title or year, and mixing two styles in one list. Each of these looks harmless alone and careless together. Run the tool, read its output once, and compare it with the source itself before you paste it into your document.
Before you submit
Run through this short check before you submit: is every author name spelled as it appears on the source, is every year present and correct, and does every in-text citation have a matching entry in your reference list? Read the list once from top to bottom rather than skimming it. Most referencing errors are found in that single slow read, and fixing them there is far cheaper than fixing them after a reviewer finds them. If one entry still looks odd after that read, check it against the original source before you change anything else.
Frequently asked questions
Is this tool really free?
Yes. It runs in your browser on this page, with no account and no payment. For live lookups, your query goes to the public API named in the tool; nothing else is sent anywhere.
Do I still need to check the result?
Yes, once. Tools apply rules; they cannot verify facts about your source. Compare the output with the source itself before submitting.
Can I use the output in my paper?
Yes. The output is a formatted reference or analysis for your own work. Keep the source’s facts accurate and the formatting consistent across your list.
What if the tool’s output differs from my style guide?
Trust the style guide. Tools encode the common rules of a style; your university or journal’s own sheet wins every disagreement. Use the tool to do the routine work, then apply the local rule where it differs.
Also available in Spanish: Resolvedor de URL a DOI – Convierte URL de Artículos en DOI con Crossref Gratis.