Run SQL on a CSV without installing anything. SmartQueryTools is a collection of hundreds of free data-file tools powered by WebAssembly: converters between CSV, Parquet, JSON, NDJSON, Excel, TSV, Arrow, and YAML, plus a SQL query tool, a data profiler, file joins, and pivot tables.

Everything runs in your browser – no uploads, no servers, no account. Your files never leave your device, which makes it safe for the spreadsheets you would never paste into a random website.