About SmartQueryTools
Free data file tools that run entirely in your browser.
What it is
SmartQueryTools is a suite of 200+ free tools for working with data files: convert between formats, run SQL queries, profile, join, deduplicate, pivot, and chart your data. It supports CSV, Parquet, JSON, Excel and more, and you can query any of them with full SQL in the SQL workspace.
Private by architecture
Every tool is powered by DuckDB-WASM — a full analytical database compiled to WebAssembly and running inside your browser. That means your files are processed on your own device and are never uploaded to any server. Privacy is not a policy promise here; it is how the site is built. See our privacy policy for the details.
Formerly QuickDataTools
SmartQueryTools was formerly known as QuickDataTools. Same tools, same local-first approach — new name. If you have suggestions for new tools or datasets, we would love to hear from you via the contact page.