Need one supported CSV converted to XLSX, or two to three Excel/CSV files combined into one workbook? This is a one-time, fixed-scope data-processing service with one checked XLSX file as the deliverable.
For a vertical append, every input file must use the same set of column headers. Column order may differ. I align columns to the first valid input, append the files in the agreed order, preserve the row order within each file, write the header once, and leave the original files unchanged.
The initial scope is limited to up to three input files, 5,000 total data rows, and 20 columns. XLSX input uses the first worksheet only. CSV input supports UTF-8, UTF-8 with BOM, and CP932/Shift-JIS.
I review anonymized samples before confirming compatibility. Price and delivery time remain TBD until the exact scope is reviewed and explicitly approved.
Included scope:
- one supported CSV converted to XLSX; OR two to three supported .xlsx/.csv files vertically appended
- maximum 3 input files, 5,000 total data rows, and 20 columns
- same header set for multi-file append; column order may differ
- agreed file order and preserved source row order
- one checked XLSX output
Deliverables:
- one checked .xlsx file
- one concise validation summary stating input count, output row/column count, and output structure
- one light revision only when the delivered file differs from the agreed written specification
Not included:
- Windows EXE, custom application, reusable tool, source code, or reusable component delivery
- header mapping, mismatched header sets, column addition/deletion/renaming
- deduplication, sorting, aggregation, formulas, advanced cleaning, date/number normalization, or joins
- macros, external links, multiple-sheet processing, encrypted or locked files
- PDF, image, OCR, Google Sheets, live/external-system operation, ongoing maintenance, scheduled processing, or reusable automation
- confidential, regulated, or high-risk data