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xls is a Haskell library to parse Microsoft Excel spreadsheet files. It parses the xls file format (extension .xls) more specifically known as BIFF/Excel 97-2004.

It can be useful for mining data from old Microsoft Excel spreadsheets.

Use decodeXlsIO to get a list of all worksheets. For example to convert all worksheets in an xls file to comma separated csv:

import Data.List (intercalate)
import Data.Xls (decodeXlsIO)

xlsToCSV :: String -> IO ()
xlsToCSV file = do
    worksheets <- decodeXlsIO file
    mapM_ (mapM_ (putStrLn . intercalate ",")) worksheets

An xls2csv utility is shipped with the package. See the haddock documentation for API details.

The library is based on the C library libxls.

• xlsior: Streaming Excel (xslx) file generation and parsing
• xlsx: Excel xslx file parser/writer

Welcome! If you would like to have something changed or added go ahead, raise an issue or send a pull request.