SQL Formatter is a powerful online tool designed to help developers, database administrators, and data analysts transform messy, unreadable SQL queries into well-structured, properly formatted code. Whether you're working with complex JOIN statements, nested subqueries, or lengthy WHERE clauses, this tool automatically organizes your SQL with proper indentation, uppercase keywords, and consistent spacing. The formatter supports standard SQL syntax as well as popular database dialects including MySQL, PostgreSQL, SQL Server, and Oracle. You can also minify SQL statements into a single line for embedding in configuration files, URLs, or reducing log file sizes. All processing happens in your browser - your SQL code never leaves your device, ensuring complete privacy and security for sensitive database queries.
Why Format SQL Statements?
Complex SQL queries often contain multiple JOINs, subqueries, conditional logic, and aggregations that become nearly impossible to read when written as a single line or without proper formatting. Well-formatted SQL code helps team members quickly understand query intent, makes code reviews more efficient, simplifies debugging, and represents professional coding standards. Consistent formatting also reduces errors when modifying queries and improves documentation quality.
SQL Formatting Rules Applied
- Keyword Capitalization: SELECT, FROM, WHERE, JOIN, ORDER BY and other keywords are converted to uppercase
- Automatic Indentation: Clauses are indented by hierarchy level for clear structure visualization
- Field List Formatting: Each selected column appears on its own line for easy addition or removal
- Alias Alignment: Table and column aliases are aligned for better readability
- Bracket Matching: Subquery parentheses are automatically paired with proper indentation
SQL Minification Mode
Sometimes you need SQL compressed into a single line - for storing in configuration files, passing as URL parameters, reducing log file sizes, or embedding in code strings. The minify mode removes all unnecessary whitespace while preserving syntax correctness. This is especially useful when working with ORMs, query builders, or systems that require single-line SQL input.
Supported SQL Dialects
This formatter handles standard ANSI SQL and recognizes syntax from MySQL, PostgreSQL, SQL Server, Oracle, SQLite, and other popular database systems. Common DDL statements (CREATE TABLE, ALTER TABLE), DML operations (INSERT, UPDATE, DELETE), and complex analytical queries with window functions are all properly formatted.
FAQ
Q: Does formatting change SQL execution results?
A: No. Formatting only changes the visual layout of code without modifying any syntax or logic. The execution results remain exactly the same.
Q: Which SQL dialects are supported?
A: This tool supports standard SQL syntax as well as common syntax from MySQL, PostgreSQL, SQL Server, Oracle, and SQLite. Most SQL statements will format correctly regardless of the specific database system.
Q: How are stored procedures handled?
A: Stored procedures, functions, and other complex objects containing control flow statements may not format perfectly. For complex procedural code, consider formatting individual SQL statements within the procedure separately.
Q: Is my SQL data secure?
A: Yes. All formatting happens entirely in your browser using JavaScript. Your SQL code is never sent to any server, ensuring complete privacy for sensitive database queries and schema information.
Q: Can I customize the indentation?
A: Yes. You can choose between 2-space and 4-space indentation to match your team's coding standards or personal preference.