Excel Compressor — Compress XLSX Files Online Free
Compress Excel files in your browser. Reduce XLSX size without changing data, formulas, or charts — free, private, no upload, no sign-up.
Drop your Excel file here, or click to browse
Files are processed in your browser — nothing is uploaded.
What is an Excel compressor?
What is it
An Excel compressor reduces the size of an XLSX file by re-saving its internal Office package at maximum compression. filecompressor.app runs this entirely in your browser, so your spreadsheets never leave your device.
Every cell, formula, and chart stays exactly as it was — only the storage becomes more efficient. It is ideal for shrinking workbooks to fit email or upload limits.
How to compress an Excel file
How to use
Compressing a spreadsheet is quick and private:
- 1
Drop your XLSX file into the dropzone above, or click to browse and select it.
- 2
The compressor re-saves the Office package at maximum DEFLATE level, then shows the new size and percentage saved.
- 3
Click Download to save the smaller Excel file. All data and formulas are unchanged.
Why use this Excel compressor?
Why use it
No data, formulas, or charts changed — everything stays intact.
100% private — spreadsheets are processed in your browser and never uploaded.
Free with no sign-up, no watermarks, and no limits.
20–35% reduction on most workbooks, more on chart-heavy ones.
Helps workbooks fit under email and upload size limits.
FAQ
Common questions about this compression tool.
Frequently Asked Questions
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