Research ToolsBibliography cleanup
BibTeX De-duplicator
Clean messy reference libraries by detecting repeated BibTeX entries with matching DOI values. Upload a `.bib` file or paste entries, review what was removed, then download a clean bibliography.
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Original entries
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Duplicates
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Unique entries
Input
Add your BibTeX library
Use upload for `.bib` files or paste entries directly.
Drag and drop BibTeX file
or browse files
Supported: .bib
Processed Locally
Your file never leaves your device. Everything is processed in your browser — we never see or store your data.
Quick guide
How to de-duplicate BibTeX
1Upload your BibTeX file or paste BibTeX content directly.
2The tool parses every BibTeX entry and normalizes DOI values.
3Entries with duplicate DOI values are removed from the output.
4Review removed entries, then download the cleaned BibTeX file.