CalcNation's SQL Formatter is a powerful browser-based tool to format, minify, validate and analyze SQL queries instantly. Auto-detects MySQL, PostgreSQL, SQLite, MSSQL and Oracle dialects, supports multi-query files, generates code snippets for Node.js/Python/PHP, and uses AI to explain and optimize your queries — all without any upload or login.
Formatted SQL will appear here…About SQL Formatter
CalcNation's SQL Formatter is a powerful browser-based tool to format, minify, validate and analyze SQL queries instantly. Auto-detects MySQL, PostgreSQL, SQLite, MSSQL and Oracle dialects, supports multi-query files, generates code snippets for Node.js/Python/PHP, and uses AI to explain and optimize your queries — all without any upload or login.
Frequently Asked Questions
What SQL dialects does this formatter support?
Supports MySQL, PostgreSQL, SQLite, Microsoft SQL Server (MSSQL), and Oracle SQL. The auto-detect feature identifies dialect-specific keywords automatically — like AUTO_INCREMENT for MySQL, SERIAL for PostgreSQL, IDENTITY for MSSQL, and NUMBER/VARCHAR2 for Oracle.
What does AI Explain do?
AI Explain analyzes your SQL query and returns a plain English description — what the query does step by step, what the result will look like, and any performance considerations. Powered by Claude (Anthropic).
What does AI Optimize do?
AI Optimize reviews your query for performance issues and rewrites it with improvements — replacing subqueries with JOINs where possible, suggesting index usage, removing unnecessary DISTINCT, and restructuring WHERE clauses. The optimized SQL is automatically applied to the input.
Can I format multiple SQL queries at once?
Yes. Paste multiple queries separated by semicolons (;). The tool automatically splits them into numbered tabs. Click any tab to navigate, format, and analyze each query individually.
What does the Code Snippet feature generate?
Snippet Generator creates ready-to-run code in Node.js (mysql2 library), Python (psycopg2), and PHP (PDO) — with your formatted SQL already embedded, database connection boilerplate, and fetch/print calls. Copy and paste directly into your project.