Free Tool

Clean and standardize BibTeX

Clean up messy BibTeX files with bibtex-tidy. Remove unwanted keys, fix formatting, and standardize style — all in your browser.

Drop a .bib file or click to browse

Or paste your BibTeX below

Fields to remove

Enclose values in braces

Convert quoted values to braces

Numeric values

Strip braces/quotes from numbers and months

Indent with tabs

Use tabs instead of spaces for indentation

Spaces per indent

Number of spaces for indentation (ignored if tabs)

Align values

Column to align values to (0 to disable)

Blank lines between entries

Insert empty line between entries

Trailing commas

Add comma after last field in each entry

Wrap long values

Wrap values at column (0 to disable)

Lowercase fields

Lowercase field names and entry types

Sort entries

Sort entries by citation key

Sort fields

Sort fields within each entry in a standard order

Abbreviate months

Convert months to three-letter abbreviations (jan, feb, ...)

Escape special characters

Escape umlauts and other special characters for LaTeX

Encode URLs

Percent-encode invalid URL characters

Strip double braces

Remove extra braces from {{value}}

Fix ALL CAPS

Convert ALL CAPS values to Title Case

Remove empty fields

Remove fields with empty values

Remove duplicate fields

Keep only one of each field per entry

Strip comments

Remove all comments from the BibTeX source

Tidy comments

Remove excess whitespace around comments

Check for duplicates

Warn about duplicate entries

Merge duplicates

How to merge duplicate entries (requires duplicate check)

Clean and standardize BibTeX

Fields to remove

Formatting

Sorting

Cleaning

Duplicates