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Compress CSV/XLSX

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Supported formats: .csv,.xlsx,.xls,.xlsm,.xlsb,.tsv

Free users: Up to 1MB per file.
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AboutCompress CSV/XLSX

Reduce file size by zipping CSV and XLSX files.Category: Transformation & Logic
Shrinking a 40MB export below a 25MB email attachment limitPacking several XLSX reports into one archive before uploading to a portal with a file size capReducing storage footprint for CSV exports you need to keep for compliance but rarely open
The Compress CSV/XLSX tool is compatible with:.Convert with CSV to XLSX or CSV to JSON first to get the file format you need, then compress the result here if it is still too large to email or upload.
The file is passed through a lossless DEFLATE/ZIP compression pass entirely in your browser, so the byte-for-byte content of your CSV or XLSX is preserved and just packed into a smaller archive. No rows, columns, or formatting are touched, only the container size shrinks, which is what matters when you are up against an email attachment limit or an upload quota.

Frequently Asked Questions:

Does it work on both CSV and XLSX?

Yes, it reduces file size by zipping either format.

Does compression change the data itself?

No, it only reduces file size, the underlying data is unchanged.


A quick fix for anyone who has hit an attachment size limit while sending a spreadsheet.