Free Online SQL Formatter & Optimizer
Elevate your database workflow with our comprehensive SQL formatter featuring real-time SQL formatting and validation, AI-powered query optimization, visual execution plan viewer, security vulnerability scanner, multi-dialect SQL support (MySQL, PostgreSQL, SQL Server, Oracle, SQLite), performance analysis and metrics, SQL diff and comparison tool, dependency mapping and analysis, syntax highlighting with error detection, import/export file support, history and favorites management, and best practice recommendations—essential for database developers, administrators, data analysts, and anyone working with SQL databases.
Formatting Options
Simple SELECT
Basic SELECT query with filtering and ordering
Complex JOIN Query
Multi-table JOIN with calculations and filtering
Analytical Query with Window
Window functions with ranking and analytical calculations
CTE and Aggregation
Common Table Expressions with complex aggregations
Data Modification
Transaction with UPDATE and INSERT operations
Schema Creation
Database schema with tables, constraints, and indexes
Query Optimization
Use proper indexing, avoid SELECT *, and optimize JOIN conditions for better database performance
Efficient Data Access
Implement proper pagination, use WHERE clauses effectively, and consider database-specific optimizations
Security First
Always use parameterized queries, validate inputs, and follow principle of least privilege for database access
Maintainable Code
Use consistent formatting, meaningful aliases, and CTEs for complex logic to improve code readability
- Sarah M., Database Architect“This SQL formatter is exceptional! The query optimization suggestions and performance analysis have transformed how I write SQL. The visual query plan and dependency mapping are incredibly powerful.”
Use 2-space indentation for optimal readability in SQL queries
Always specify columns instead of using SELECT * in production queries
Use CTEs for complex logic to improve query readability and maintainability
Validate SQL syntax early to catch errors before execution
Use the security scanner to identify potential injection vulnerabilities