About Tabularly

Tabularly is a local-first toolkit for working with CSV and Excel files. It runs entirely in your browser — there is no server doing anything with your data. The Free tier uses an in-memory engine for files up to 10 MB. Pro runs DuckDB compiled to WebAssembly in a worker thread, so the same browser can handle files of any size without your data ever leaving your device.

Why it exists

Every other "merge CSVs online" tool we found either uploaded your files to a server, gated the useful features behind a signup, or hit you with a paywall after the first attempt. Modern browsers can do this work without any of that — and your data never has to leave your device.

What's next

Tabularly ships with six operations — merge, append, dedupe, filter, convert, and pick columns — in both Free and Pro tiers. We're working on cloud connectors (Google Drive, Dropbox, OneDrive), a natural-language AI sidebar (bring your own API key), and an offline desktop app for power users.

Who built it

Tabularly is built by a small independent team. If you have a feature request or a bug report, use the Feedback button in the bottom-left corner — we read every submission.