Bibtex-normalizer is an open source project to validate and normalize Bibtex entries online. This tool uses a defined standard to organize your references in a single way, making it easier to read.
https://hsborges.github.io/bibtex-normalizer
If you have any feedback, please open an issue on this repository.
BibTeX Tidy - https://github.com/FlamingTempura/bibtex-tidy