Does this lose any data?

No — it re-packs the workbook's internal structure without changing the data.

Compress Excel

Compress Excel re-saves a workbook with tighter compression to reduce its file size.

Click to upload a fileor drag and drop

Compress a CSV file with gzip.

Remove empty rows from an Excel sheet.

Combine multiple PDF files into one document.

Split a PDF into individual single-page files.