How large a CSV can I process?

Up to about 50 MB comfortably. Above 20 MB we warn because rendering a very large table may slow the browser. Parsing streams so it scales; rendering is virtualized.

Does my file upload anywhere?

No. Parsing and rendering runs entirely in your browser via PapaParse. The CSV never leaves your device.

Can I dedupe by a subset of columns?

Yes. Open the Dedupe menu and pick which columns define a duplicate. Exact-row dedupe (comparing every column) is the default.

CSV Wrangler

Filter, sort, dedupe, and export CSV files in your browser — no upload.

Your data never leaves your device

Frequently Asked Questions

How large a CSV can I process?

Up to about 50 MB comfortably. Above 20 MB we warn because rendering a very large table may slow the browser. Parsing streams so it scales; rendering is virtualized.
Does my file upload anywhere?

No. Parsing and rendering runs entirely in your browser via PapaParse. The CSV never leaves your device.
Can I dedupe by a subset of columns?

Yes. Open the Dedupe menu and pick which columns define a duplicate. Exact-row dedupe (comparing every column) is the default.