https://flamingtempura.github.io/bibtex-tidy/

[Click Tidy to clean ]

BibTeX Tidy

This tool tidies bibtex files by fixing inconsistent whitespace,
removing duplicates, removing unwanted fields, and sorting entries.

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Whitespace
(*) ( )
Spaces: [2                   ]
[*]
Column: [13                  ]
[ ]
Column: [80                  ]
Values
[*] [ ]
Fields to enclose in double braces:
[title               ]
Space delimited, e.g: title journal. -year author.
[ ] [*] [ ] [ ] [ ] [ ] [ ] [ ]
[5                   ]
Author lists longer than this will be truncated to "and others".
Sorting
[ ]
Fields to sort by:
[key                 ]
Space delimited, e.g: key type publisher author. For descending
order, prefix the field name with a dash, e.g. -year author.
[*]
Field order:
[title shorttitle aut]
Space delimited, e.g: title author year
Duplicates
[*]

What to check:

[*] Matching Keys [ ] Matching DOIs [ ] Similar author and title [ ]
Similar abstracts
[ ]
(*) Combine (default)
Keep original entry and merge in fields of duplicates if they do not
already exist ( ) Overwrite
Keep original entry and merge in fields of duplicates, overwriting
existing fields if they exist ( ) First
Only keep the original entry ( ) Last
Only keep the last found duplicate
Clean up
[ ]
Fields to omit:
[                    ]
Space delimited, e.g: id type publisher author
[ ] [*] [*] [ ] [ ]
CLI

To run this configuration on the command line:

Tidy