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Bibliography deduplicator

Find duplicate references in pasted BibTeX or RIS by DOI, normalised title, year, and first author, review each cluster, and download a clean merged file.
BibTeX or RIS library

Paste a library to scan it.

Everything runs in this tab. No record is uploaded, and no DOI or title is looked up online, so a reference can only match another reference that is in the paste. The parser is tolerant, not certified: standard BibTeX entries and RIS tag lines read fine, exotic macros and nonstandard dialects may not. Title similarity compares cleaned plain letters of both titles, so LaTeX accent commands are ignored rather than interpreted. The clean library downloads as BibTeX, with RIS records converted and citation keys made unique.
OptionsCopy BibTeX

More text tools

- Find & replace (/text/find-replace)
- Word & character count (/text/word-count)
- Compare two texts (/text/diff)
All text tools (/text)

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Canonical HTML: https://nutter.tools/text/bibliography-deduplicator
Markdown version: https://nutter.tools/text/bibliography-deduplicator.md
Plain-text version: https://nutter.tools/text/bibliography-deduplicator.txt
Agent index: https://nutter.tools/llms.txt