Compress CSV to ZIP, free in your browser

Package a CSV or TSV file in a ZIP archive using in-browser compression while leaving the source data unchanged.

How to compress a CSV file

1. Choose a CSV or TSV file.
2. Compress it into a ZIP archive.
3. Download the archive and extract it to get the original file.

Limits & good to know

• CSV and TSV files up to 50 MB are processed on your device.
• Compression savings depend on how repetitive the data is.
• The ZIP contains the original delimited file; it does not rewrite cell values.

Frequently asked questions

Are my files uploaded to a server?

Your files are processed on your device, not uploaded to our servers. Your file and edits are saved in this browser for recovery, and previous documents remain in Saved drafts when you open another file. Use Saved drafts to resume or delete individual copies, or clear this site’s browser data to remove all copies. Browser storage can be cleared or become unavailable; download important work.

Will compression change my data?

No. The archive contains the same UTF-8 text and line endings read from the selected file.

Is this really free, or free "until you hit a limit"?

Really free. Unlike most "free" PDF sites there is no task-per-day cap, no locked Pro features, no watermark stamped on your file, and no payment step before download. Every tool is the full tool.