Is SQL Toolkit free to use?

Yes, completely free with no signup required. All processing happens in your browser — your data never leaves your computer.

What tools does SQL Toolkit offer?

SQL Toolkit offers a SQL Formatter, JSON to SQL Converter, CSV to SQL Converter, SQL to JSON Converter, and SQL to CSV Converter — all browser-based and free.

SQL Migration Safety Analyzer

Paste your ALTER TABLE migration SQL and get an instant risk report before running it on production.

This free SQL migration checker analyzes ALTER TABLE statements for common production pitfalls — dropped columns, NOT NULL columns without defaults, breaking renames, and lost indexes — so you can catch issues before they cause downtime.

Keyboard shortcuts: Ctrl/Cmd + Enter to analyze, Ctrl/Cmd + K to clear

Current Schema (optional — for cross-checking)

Migration SQL (ALTER TABLE statements)