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Excel Compressor — Compress Excel Files Online

Compress XLSX files to reduce size by up to 90% without losing quality. Free, fast, and 100% private — compression runs in your browser.

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Drop your Excel file here

Or click to browse and select your XLSX file

Supports .xlsx files up to 200MB

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Lightning Fast

Compress your Excel files in seconds with our optimized compression algorithm.

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100% Secure

All processing happens in your browser. Your files never leave your device.

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Data Preserved

Reduce file size significantly while keeping your files exactly as you made them.

How to Compress Excel Files

1

Upload File

Select your Excel file from your device

2

Auto Compress

Images are automatically optimized in your browser

3

Preview Results

See the compression ratio and file size reduction

4

Download

Get your compressed Excel file instantly

Why Use Our Excel Compressor?

Key Benefits

  • • Reduce file size by up to 90%
  • • Email-friendly file sizes
  • • Faster file transfers and uploads
  • • Save storage space
  • • Keep your files intact

Security Features

  • • 100% client-side processing
  • • Files never uploaded to servers
  • • No data retention
  • • Works offline
  • • Complete privacy

Why is my Excel file so large?

Spreadsheet bloat has two sources: embedded media (which this tool compresses automatically) and cell-data overhead (which you can clean up in Excel). The six most common causes:

Embedded images and logos

Pasted screenshots, product photos, and headers with logos are stored at full original size. This is what our compressor optimizes — often the difference between a 40 MB and a 4 MB workbook.

The used range is bigger than your data

If you ever formatted or touched cells far below your data, Excel saves all of them. Press Ctrl+End — if the cursor lands far past your data, delete those rows and columns and save.

Whole-column formatting

Applying fills, borders, or conditional formatting to entire columns forces Excel to track formatting for over a million rows. Apply formats to the data range only.

Pivot table caches

Each pivot table stores a hidden copy of its source data. In PivotTable Options, disable "Save source data with file" if the source lives in the same workbook.

Hidden and forgotten sheets

Old scratch sheets, hidden tabs, and obsolete data dumps quietly inflate the file. Unhide everything (right-click any tab) and delete what is no longer needed.

Legacy .xls format

The binary .xls format is far less efficient than .xlsx. Simply re-saving an old workbook as .xlsx often halves its size before any other optimization.

Compress an Excel file for email

Gmail and Yahoo cap attachments at 25 MB, Outlook.com at 20 MB, and many corporate mail servers reject anything over 10 MB. Run your workbook through the compressor above, and if it is still too large, apply the used-range and pivot-cache cleanups listed on this page — the combination resolves nearly every oversized spreadsheet.

Need other formats? Try our free Word compressor, PowerPoint compressor, PDF compressor, or convert the workbook with Excel to PDF.

Need to compress files larger than 50MB?

Unlock ChatSlide Lite for a one-time payment of $5 and compress Excel files up to 200MB. No subscription required.

$5
one-time

Frequently Asked Questions

Find answers to common questions about compressing Excel files.

Workbooks containing images, logos, or pasted screenshots typically shrink by 40-90%. Data-only workbooks compress less from this tool alone — cleaning up the used range and pivot caches in Excel helps further.

No. Only embedded images are optimized — cells, formulas, pivot tables, charts, macros, and formatting are untouched. Your workbook recalculates exactly as before.

An XLSX file is a ZIP archive containing XML and media. Our tool re-encodes oversized embedded images at a visually identical quality, then repackages the archive with maximum compression.

This tool supports .xlsx files (Excel 2007 and later). For legacy .xls files, open them in Excel and save as .xlsx first — that step alone often halves the file size.

No. Compression runs entirely in your browser — your workbook never leaves your device. Safe for financial models, payroll data, and other confidential spreadsheets.

Usually the used range is bigger than your data (press Ctrl+End to check), formatting was applied to entire columns, or pivot tables are storing hidden copies of their source data. Deleting unused rows/columns and disabling 'Save source data with file' fixes most cases.

Files up to 50 MB are free. Files between 50 MB and 200 MB require ChatSlide Lite, a one-time $5 unlock with no subscription.

Yes — files up to 50 MB compress free with a free account, no watermark, and no daily limit.

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