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Private in your browserNo upload to any server

Excel File Compressor Online

Choose one or more XLSX workbooks, set the maximum size in KB, and download the smallest safe copy your browser can create—without uploading the file.

Private: processed in your browser

1024 KB

Preset settings are stored only in this browser.

Private: files stay on your device. The server receives no file. Some formats can only be reduced as ZIP.

How to compress this Excel file

  1. Choose one or many files from your device.
  2. Keep the preset limit or enter your own KB target.
  3. The browser optimizes safe document metadata and package structure locally.

Reduce Excel file size without uploading it

An XLSX workbook is a package of worksheets, formulas, styles and media. This Excel file compressor rebuilds that package, removes safe preview and operating-system leftovers, and recompresses embedded JPG or PNG images when they are the main source of file size.

Worksheets, cell values, formulas and the workbook structure stay in the XLSX file. Only images that can be made smaller safely are recompressed; the original file on your device is never changed.

Useful for email, forms and upload limits

When an Excel file may not become much smaller

Workbooks made mostly of cell data, formulas or already-compressed images may already be close to their smallest safe size. The tool reports the best result it can produce instead of removing spreadsheet content.

FAQ

How does the Excel file compressor reduce XLSX size?

It rebuilds the XLSX package, removes safe package leftovers and recompresses embedded JPG or PNG images when that reduces the file.

Are formulas and worksheet data preserved?

Yes. Cell values, formulas, worksheets and workbook structure remain in the XLSX output. Keep the original as a backup for important documents.

Is my Excel file uploaded to a server?

No. Compression runs locally in your browser and the server receives no workbook or file contents.

Can every XLSX file reach an exact KB target?

No. Data-heavy workbooks with few images may not shrink much. The result shows whether the selected upload limit was reached.

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