Excel
Kotlin DataFrame supports reading from and writing to Excel files in both .xls and .xlsx formats.
Requires the dataframe-excel module, which is included by default in the general dataframe artifact and in %use dataframe for Kotlin Notebook.
Read
You can read a DataFrame from an Excel file (via a file path or URL) using the readExcel() method:
val df = DataFrame.readExcel("example.xlsx")
val df = DataFrame.readExcel("https://kotlin.github.io/dataframe/resources/example.xlsx")
Write
You can write a DataFrame to an Excel file using the writeExcel() method:
df.writeExcel("example.xlsx")
22 August 2025