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UPDATE: This page has moved to oct4th.sandbox.bio

Oct4th is now available as

  • A web application at oct4th.sandbox.bio
  • A command-line tool on PyPI that you can install by running pip install oct4th. The command-line utility is useful if you have a lot of files to convert or if you’re converting large files.


Although Excel can be a powerful tool for biologists, it also converts some gene names into dates. For example, the tumor suppressor gene DEC1 becomes December 1st, while the transcription factor OCT4 is interpreted as October 4th.

The Oct4th app allows you to convert your CSV and TSV files into XLSX, and avoid avoiding having your genes converted into dates.

Make sure to check out my blog post describing this issue in more detail.

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