Shrink oversized .xlsx files by compressing the images inside them. Your formulas, values and formatting are never touched.
or click to browse - nothing leaves your device
Most oversized .xlsx files are large because of embedded images - pasted screenshots, logos or scanned pages - stored at far higher resolution than needed. This tool opens your workbook entirely inside your browser, finds those embedded images, recompresses them, and repacks the file. Your cell values, formulas, charts, pivot tables and formatting are left exactly as they are; only image data and the file packaging are touched.
Yes. The compressor never reads or modifies cell values, formulas or calculation results. It only recompresses image files inside the workbook package and, if you opt in, removes references to other external workbooks.
No. The entire process, from reading your file to generating the compressed download, runs locally in your browser using JavaScript. Your spreadsheet is never sent to any server.
If your file is large mainly due to sheer amount of data or a big pivot cache rather than images, compressing images alone won't help much - this tool is specifically built for image-heavy workbooks such as ones with pasted screenshots, scanned receipts or logos.