Compress Excel
Make an XLSX workbook smaller without flattening it. Accepts XLSX up to 20 MB. Produces smaller XLSX file. Processing happens locally in your browser.
Input: XLSX up to 20 MB · Output: smaller XLSX file
Quality boundary
XLSX compression optimizes compatible embedded images and the package ZIP structure while preserving workbook parts. Formulas, charts, external links, and calculation behavior should still be reviewed in Excel; rewriting invalidates existing Office digital signatures.
How this file is processed
The file stays on this device during processing. Review the result before consequential use.
Learn the limits of XLSX compression
Useful next actions
Make an Excel workbook smaller without flattening worksheets.
XLSX is also a ZIP-based package. FileClear AI recompresses it and optimizes compatible embedded images while leaving worksheets, formulas, charts, and links in the workbook structure.
Know what can actually shrink
Embedded screenshots, logos, and other images can often be reduced. Workbooks dominated by formulas, cached data, pivot caches, or external connections may need source-level cleanup in Excel and may not shrink much here.
Recalculate and review the workbook
Open the result in Excel, recalculate formulas, check charts and pivots, test links, and review hidden sheets or named ranges that matter. Keep the original when macros or external data connections are part of the workflow.
Quick quality check
- Keep the XLSX source
- Recalculate formulas
- Check charts and pivots
- Test external links
- Review embedded images