Questions & Answers

Yes. Because we process data locally, the limit depends on your computer's RAM, not our server limits. Most modern browsers can handle files up to 500MB comfortably.

We use a 'flattening' algorithm. An object like `user: { address: { city: 'NY' } }` becomes a column header `user.address.city` with the value 'NY'.

Absolutely. As mentioned in our security section, no data is transmitted to any server. You can audit the network tab in your browser developer tools to verify this.

Yes. You can specify your target table name in the settings panel before generating the INSERT statements.

Yes, with one caveat. Every tool runs entirely in your browser, so once a tool's page has finished loading you can disconnect from the internet and it will keep working. We are not yet a fully installable PWA, so opening a page you have not already loaded still needs a connection.

We primarily support standard SQL (ANSI), but the output is compatible with MySQL, PostgreSQL, SQLite, and Microsoft SQL Server.

Excel stores dates as serial numbers, so 44562 is really a date. Our converter currently keeps such values as-is rather than reformatting them, so if you need a readable date, format the column as a date in your spreadsheet before importing. Automatic serial-to-date detection is on our roadmap.

Currently, Developer Box is a UI-first tool for manual ad-hoc tasks. We do not provide a public API yet, as everything runs client-side.