CSV to Excel

Takes a CSV file and produces a formatted Excel workbook (.xlsx). The output has bold headers in the first row and columns sized to fit the data. It is not a raw paste; it looks like a proper spreadsheet you could hand to a colleague.

Use this when you have cleaned data in CSV and need to share it as an Excel file. Common situations: handing a report to a manager who expects .xlsx, sending data to a client, or converting output from another Operelio tool into a formatted spreadsheet. The auto-sized columns and bold headers save you the manual formatting step.

The first row is formatted as bold headers. Column widths are auto-sized by sampling the header and the first 100 rows of data to find the widest value in each column. Widths are capped at 50 characters to keep the spreadsheet readable. If your data has very long cell values, the column stops at 50 characters wide and Excel wraps the text.

The output is always a single-sheet .xlsx file. The sheet is named after your CSV filename by default (for example, pipeline.csv becomes a sheet named pipeline). If the filename contains characters Excel forbids (\ / * ? : [ ]) they are replaced with underscores, and names longer than 31 characters are truncated.

Every value in your CSV comes through exactly as-is in the Excel cell. Leading zeros on IDs are preserved, and no silent conversion to scientific notation occurs on long numeric strings.

Excel still coerces clean numeric columns for SUM and sort when you open the file, and ISO-formatted dates (YYYY-MM-DD) display and sort in the right order as text.

Every row and column in your CSV is written to the workbook as-is, including blank cells and blank rows. If you want those trimmed, clean the CSV before uploading or run Deduplicate afterwards on the downloaded file.

If the CSV is empty (no headers, no rows), the job fails with an error. Add at least a header row to your file and try again.

Row limits apply to every job: 50,000 on Pro, 75,000 on Team, 150,000 on Agency. If your file is larger, Operelio processes the first N rows up to your plan's limit and shows a banner on the results page with your file's total row count, the limit that was applied, and the number of rows processed.

File size limits are 25 MB on Pro, 35 MB on Team, and 100 MB on Agency. Uploads larger than the cap are rejected at upload with an error, before the job runs.

Every cell in your CSV is written to the Excel workbook as text, with an Excel General number format. That means the workbook looks and behaves like a hand-typed spreadsheet: Excel coerces clean numeric columns for SUM and sort, text stays text, and nothing is silently converted to a different type.

After the job finishes you land on a results page that walks through the output. Expect to see: