Free data tools
Try it straight away: open a tool below, paste a schema or drop in a spreadsheet, and read the result. These are small, single-purpose tools for the work that comes before the analysis — reading a schema, describing it, moving a spreadsheet into a table. Each one runs entirely in your browser, so there is no signup, no upload, and your schema and your data never leave your machine.
CSV to SQL converter
Paste a CSV or upload a CSV or Excel file and get CREATE TABLE plus INSERT statements for PostgreSQL, MySQL, SQL Server or SQLite, with column types inferred from your values.
Data dictionary generator
Paste SQL CREATE TABLE statements or upload a CSV or Excel file and get a clean, exportable data dictionary — tables, columns, types, keys and business meanings. Runs in your browser.
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Ask your data questions in plain English — no SQL. Connecting a database is the technical part: a read-only user and network access, once. If your numbers live in a spreadsheet, none of that applies — a Google Sheet connects with no read-only user and no open port, and CSV and Excel uploads work on the 14-day Pro trial. The one thing no plan waives is your own AI provider key, and a Google Gemini key is free to create.
Every new account starts on a 14-day Pro trial with no card. After it lapses, the free tier stays free.