CSV & spreadsheets tools

This is the section we are building next, for the same reason JSON came first: the files people most need to convert are the ones they least want to upload. An export of your customer table is not something to hand to a free web converter.

We have not built this section yet. Rather than leave the page empty, here is what we would use in the meantime — and whether it actually runs on your device.

This one is next on the list, and we have not found a local-first option good enough to send you to in the meantime. That gap is roughly the point.

What will replace this

Browser-based CSV tools: convert to JSON and SQL, deduplicate, detect column types, compare files and anonymise columns. In development. When those ship they will appear on this page, at this address — so a bookmark or a link you share now keeps working.

See what the finished sections look like →