Choose Files:

Drop Excel files here
(Up to 100 files, 40 MB each.)

Compression Settings:

Output Files:

To compress all output files in a ZIP file, click "" icon on the right, then click "Add to ZIP". To download one single file, simply right-click on file link and click "Save link as...".

File Name Original Size Output Size Size Compressed Actions

How to compress Excel files:

  1. Settings

    Set image quality first. Image quality value can be 1 (lowest image quality and highest compression) to 100 (best quality but least effective compression). The settings are optional, you can close "Settings" section by clicking the "X" on the right.

  2. Add Files

    Drag multiple Excel files to the "Choose Files" section. File extension name can be .xls or .xlsx. Each Excel file size can be up to 40 MB.

  3. Compress Files

    The batch compression automatically starts when files are uploaded. Please be patient while files are uploading or compressing.

  4. Output Files

    The output files will be listed in the "Output Files" section. To compress all output files in a ZIP file, click "" icon on the right, then click "Add to ZIP". You can right-click on file name and click "Save link as..." to save the file. The output files will be automatically deleted on our server in two hours, so please download it to your computer or save it to online storage services such as Google Drive or Dropbox as soon as possible.

  5. Unblock Files (if needed)

    You may need to unblock the Excel files if your Microsoft Excel software can't open them. To unblock a file on Windows, right click on the file and open "Properties". Under the General tab, towards the bottom you will see "Unblock" button or checkbox next to "Security: This file came from another computer and might be blocked to help protect this computer". Click on it, then click "Apply/OK".


Microsoft Excel up until 2007 version used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. Excel 2007 uses Office Open XML (.XLSX) as its primary file format, an XML-based format that followed after a previous XML-based format called "XML Spreadsheet" ("XMLSS"), first introduced in Excel 2002. Although supporting and encouraging the use of new XML-based formats as replacements, Excel 2007 remained backwards-compatible with the traditional, binary formats.

This compressor only compresses images in Excel files, it can't minify Excel file which doesn't have images in it. We can't find any open-source projects to compress Excel spreadsheets, therefore we wrote all the source codes from scratch by ourselves. Your bug reports, comments or suggestions are welcome!