Compress Excel Files
Reduce your Excel file size. Remove unused data, optimize structure, and apply efficient compression.
Compression Options
Drop your files here or click to upload
Supports .xlsx, .xls, .xlsm, .xlsb · up to 50MB · or paste a file from your clipboard
Need to compress an Excel file online? This free tool reduces XLSX file size in your browser - trim empty ranges, drop comments, and recompress the workbook so it is small enough to email or upload, without sending your data anywhere.
How to Compress Excel Files
- Select options - Choose compression settings that suit your needs.
- Upload your file - Drag and drop or click to browse.
- Review results - See how much space you saved.
- Download - Click download to save your compressed file.
Compression Options Explained
- Trim empty rows and columns - Removes unused space at the edges of your data, reducing file size.
- Convert formulas to values - Replaces formulas with their calculated results. This can significantly reduce file size but you'll lose the ability to recalculate.
- Remove comments - Deletes all cell comments and notes from the workbook.
See What's Making Your File So Large
Compression works best when you know where the bytes are going. After each run, this tool shows a breakdown of your workbook by category - worksheet data, embedded images, pivot table caches, styles, and other parts - with the share of the file each one takes. Some compression services sell this kind of file analysis as a separate tool; here it is built into every compression, free.
If images dominate the breakdown, switch on Recompress embedded images and run the file again: pictures are scaled down and re-encoded in your browser while sheets, formulas, and charts stay untouched. On image-heavy workbooks this is routinely the largest single saving.
How This Compares to Other Excel Compressors
Most Excel compressors send the workbook to a remote service and apply one preset. That is convenient, but it hides both the upload step and the reason the workbook is large.
| Tool | Where your file goes | Approach |
|---|---|---|
| ExcelTool.io (this page) | Nowhere - compressed in your browser | No signup or service-side size cap; analyzes workbook parts, trims unused ranges, removes selected content, and can recompress embedded images across a batch |
| Aspose.Cells Compress | Aspose servers; the page says files are deleted after 24 hours | Compression-level control and multiple-file upload; the live page advertises up to 10 files and shows sign-in or plan gates for larger files and batches |
| SlideSpeak Excel Compressor | Uploaded to a server-side engine and deleted after compression | One XLSX or XLS file up to 100 MB; targets images, embedded fonts, and media with no signup |
| WeCompress | Briefly stored on Microsoft Azure servers, then deleted | One file up to 50 MB in the web tool; optimizes embedded media and excess cell formatting |
| YouCompress | Cloud servers; uploads are removed after a few hours | Automatic XLS, XLSX, or XLSM compression with no daily file-count limit and no manual optimization controls |
Excel-compressor descriptions checked 2026-07-28 against the linked live pages; see each provider for current limits and terms.
Spreadsheet bloat is not one problem. Empty used ranges and duplicate styles are workbook-structure overhead, while embedded pictures are media and formula-to-value conversion changes future recalculation. This page exposes those categories separately, reports their sizes, and makes destructive options explicit instead of treating every byte as interchangeable.
Tips for Smaller Excel Files
- Delete unused sheets and hidden data
- Remove unnecessary formatting and conditional rules
- Compress or resize embedded images
- Use XLSX format instead of XLS (XLSX uses ZIP compression)
- Save using the .xlsb binary format for very large files