🔖Citation Generator
Paste a DOI, a URL, an ISBN, or a raw citation into the input box and get back six properly formatted citations: APA 7th edition, MLA 9, Chicago notes-and-bibliography, Harvard, IEEE, and BibTeX. The output also includes a brief metadata summary (author, year, title, publisher) so you can verify the source was identified correctly before copying any citation into your paper. When the tool cannot confidently identify the source, it says so in a "Note" section at the top rather than fabricating data, better to flag uncertainty than to invent an author name. The most common student and researcher mistakes are wrong year, wrong volume number, and missing DOI. The tool catches all three by extracting them from the source rather than relying on you to type them correctly.
How citation generation became table-stakes for academic writing
Citation formatting is a fiddly, low-value task with high penalties for getting wrong. APA wants the year in parentheses after the author. MLA wants the year at the end of the entry. Chicago has two distinct systems (notes-bibliography vs author-date) and most students get them confused. Harvard varies by institution. IEEE wants numbered references in citation order. BibTeX wants escaped LaTeX characters and a citation key. Memorizing the rules for all six and applying them consistently across a 30-source bibliography costs hours and produces a long tail of subtle errors that graders flag. The tool collapses that work into a paste and a click.
The output produces all six formats in parallel so you do not have to switch tools when you switch citation styles. Most academic writing in the US uses APA (psychology, education, business) or MLA (humanities) or Chicago (history, theology). Engineering and computer science use IEEE. Bibliographic management tools like Zotero, Mendeley, and JabRef all import BibTeX. Producing all six at once means you can copy the relevant block into your paper and store the BibTeX for future reference in one step.
The honest-about-uncertainty principle matters here more than in most AI tools. Hallucinated citations are a real problem with LLM-generated bibliographies, ChatGPT and similar tools have a track record of producing entirely fabricated references with plausible-sounding authors and DOIs that point nowhere. The system prompt for this tool instructs Claude to extract or infer only what it can verify, mark unknown fields as "[unknown]", and add an explicit "Note" section when the source cannot be identified confidently. If you paste a DOI that does not resolve, you get a transparent admission rather than an invented citation.
Verification is still your responsibility. The metadata summary at the top of the output lists the author, year, title, publisher, and DOI/URL the tool extracted. Before copying any citation into your paper, spend ten seconds confirming that summary matches the actual source. For high-stakes submissions (thesis, dissertation, peer-reviewed paper) cross-check against the source directly and against a manual citation. The tool gets the structure right but the underlying metadata is only as good as what the LLM can extract or recall.
How to use Citation Generator
- 1
Paste the source identifier or raw citation
Paste any of: a DOI (10.xxxx/something), a URL to the source, an ISBN, or a raw citation in any format. You can also paste a paper title if you do not have an identifier. The tool will try to extract or recall the metadata.
- 2
Click Run Citation Generator
The tool sends your input to Claude, which extracts or recalls the metadata and formats it in all six citation styles. Generation takes 5 to 10 seconds.
- 3
Verify the metadata summary
The output starts with a metadata summary (authors, year, title, publisher). Confirm this matches the actual source before copying any citation. If a field is marked [unknown] or the summary looks wrong, you may need to add more information to your input.
- 4
Copy the citation in the style you need
Each style is in a separate markdown section. Copy the block under the style heading your professor requires. For BibTeX, copy the entire code block including the @article{} wrapper.
- 5
Repeat for your bibliography
Run the tool once per source. For long bibliographies (20+ sources) save the BibTeX outputs to a .bib file and let your LaTeX or Zotero workflow handle the rest.
Real-world use cases
Undergraduate writing a psychology research paper in APA 7
The student has 22 sources to cite, journal articles, two books, three websites, and a government report. Running each through the tool produces consistent APA 7 citations in 15 minutes total. The student manually verifies five randomly chosen entries against the original sources and finds no errors.
PhD student building a BibTeX bibliography for a dissertation
The student has been collecting papers in a folder for two years. They paste each paper's DOI into the tool, copy the BibTeX block to their references.bib file. The dissertation builds with LaTeX, the bibliography renders correctly, and every citation key follows a consistent author-year-title pattern.
Journalist citing sources in a long-form article
The journalist needs Chicago-style notes for a magazine piece. They paste URL after URL of news articles, government documents, and academic papers, copy the Chicago notes section out for each. The article submits with consistent, properly formatted citations.
High school teacher checking student bibliographies for AP English papers
The teacher pastes each student-cited source into the tool to verify the bibliography entries the students submitted. Discrepancies between the tool output and student work flag where students used a citation generator that hallucinated, or got the year wrong, or made up a publisher. The teacher uses this as a teaching moment about source verification.
Pro tips
💡 Prefer DOI over URL when both exist
A DOI is a permanent identifier that does not break when the publisher reorganizes their site. URLs break. Citations with DOIs survive longer and resolve more reliably. If the source has a DOI listed, use it as your input.
💡 Verify the metadata summary on every run
The summary tells you what the tool thinks it is citing. A wrong summary means a wrong citation in all six formats. Ten seconds of verification per source prevents bibliography errors that take hours to fix later.
💡 Use BibTeX for any project longer than 10 sources
Manual citation management above 10 sources gets error-prone. Even if you do not use LaTeX, importing the BibTeX into Zotero or Mendeley gives you a structured library that re-exports to any citation style on demand.
💡 Cross-check at least 10% of citations against the source
For a 20-source bibliography spot-check at least 2 entries by opening the original paper and comparing the metadata. For a 100-source dissertation bibliography spot-check at least 10. AI metadata extraction is good but not perfect, and the cost of a wrong citation in a published paper is much higher than the cost of verification.
Frequently asked questions
How does the tool know the metadata for a DOI?
Claude has seen large amounts of academic literature during training, including DOI-indexed papers. For well-known papers the metadata comes from training. For obscure papers the tool may flag uncertainty. The tool does not currently fetch live from CrossRef or DOI.org, so for newly published papers (post training cutoff) the metadata may be incomplete.
Will it invent citations or authors?
The system prompt instructs Claude to mark unknown fields as [unknown] and add a Note section when the source cannot be identified confidently. Hallucinated citations remain a risk in any LLM-based tool, which is why we recommend verifying the metadata summary on every run.
Does it support APA 6 or older styles?
Default output uses current editions: APA 7, MLA 9, Chicago 17. For older editions, mention the version in your input ("Cite this in APA 6th edition format") and the tool will adapt. APA 6 is rarely required since 2019 but still appears in some legacy institutional guidelines.
Can I cite a tweet, podcast, or YouTube video?
Yes. Paste the URL of the tweet, podcast episode page, or YouTube video. The tool will pull the available metadata (author, date, title, platform) and format it in each style. Different styles have different conventions for social media citations, APA and Chicago have explicit guidance, MLA leaves some judgment to the citer.
What if the citation style I need is not one of the six?
The six styles cover roughly 95% of academic and professional writing. For Vancouver, AMA, ASA, or other specialized styles, the BibTeX output is your fallback, any citation manager can convert BibTeX to any documented style. For obscure institutional styles, manual editing of the closest match is the practical path.
Will the BibTeX work with Overleaf and natbib?
Yes. The generated BibTeX uses standard @article, @book, @misc entries with conventional field names (author, title, year, journal, volume, number, pages, doi). It imports cleanly into Overleaf, JabRef, Zotero with the BetterBibTeX plugin, and any standard LaTeX workflow.
How long can my input be?
Free tier accepts up to 600 characters per run, enough for a DOI, URL, or even a full raw citation. Generally one source per run. Higher limits with credits if you want to paste a long citation list for batch processing.
Will my input be stored?
No. The input is sent to Anthropic Claude for the citation step only. We do not store the input or the output. Each session is independent.