the format of the 8949 must be followed and the IRS would need to be able to read the file. so you could download it into a csv file but then would have to print it out. columns would need to match 8949 and totals by type for each column would be needed.
however, details do not need to be provided for types A or D transactions if entered on schedule D lines 1a and 8a. this means that proceeds and tax basis were reported to the IRS and none of these transactions had an adjustment.