Why turn a spreadsheet into PDF
A spreadsheet is easy to change by accident, and it looks different depending on the program and screen. A PDF of a bill, timetable, mark list or price list shows the same rows and columns to everyone in the same fixed layout, which makes it right for sharing, printing and official submissions.
What happens when you convert
The tool reads the values in your .xlsx file and draws each sheet as a table, with the sheet name as a heading, on A4 pages. The pages are saved in the PDF as pictures, so the PDF looks the same as the preview. Formulas are not kept — only their results are shown — and the text in the PDF cannot be selected.
Which spreadsheets convert best
Simple tables with a clear header row and a sensible number of columns fit best on A4. Very wide sheets with many columns are squeezed to fit, which makes the text small. Charts, pictures, colours and cell formatting are not reproduced — the PDF shows the cell values as a clean table.
Common problems and how to fix them
Text is too small: hide or delete columns you do not need, or split the sheet into two. Numbers look wrong: open the file in Excel, let it recalculate, save it, and convert again. You need selectable text: use Excel's own Save as PDF, or run the result through OCR PDF.
Good habits
Remove helper sheets and hidden test data before converting, check the last page for cut-off rows, and keep the .xlsx file for future changes.