SQL Formatter
Format SQL queries with proper indentation and syntax highlighting. Supports MySQL, PostgreSQL, SQL Server. Free online SQL beautifier tool.
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How to Use SQL Formatter
- Paste your SQL query into the input textarea
- Select formatting options (indent size, keyword case, comma position)
- Click "Format SQL" to apply beautification
- Review the formatted output with syntax highlighting
- Copy the formatted SQL to your clipboard
- Use "Load Sample" to test with example queries
About SQL Formatter
The SQL Formatter is a developer-friendly tool for beautifying and formatting SQL queries. Transform compressed, unreadable SQL into clean, properly indented code with syntax highlighting for easier debugging and collaboration.
SQL (Structured Query Language) is the standard for database operations, but complex queries quickly become difficult to read, especially when copied from logs, ORMs, or minified sources. Our SQL Formatter parses your queries and applies consistent formatting rules, making them easier to understand and maintain.
Formatting Features: - Keyword Uppercase: Automatically capitalizes SQL keywords (SELECT, FROM, WHERE, etc.) - Smart Indentation: Configurable spacing (2, 4, or 8 spaces) for nested queries - Clause Alignment: Each major clause (SELECT, FROM, WHERE, JOIN) on its own line - Comma Positioning: Choose between end-of-line or start-of-line comma style - Syntax Highlighting: Color-coded keywords, strings, and numbers for readability
Supported SQL Features: - Basic queries (SELECT, INSERT, UPDATE, DELETE) - JOIN operations (LEFT, RIGHT, INNER, OUTER) - Subqueries and nested SELECT statements - Aggregate functions (COUNT, SUM, AVG, MAX, MIN) - GROUP BY, HAVING, ORDER BY clauses - Window functions and CTEs (Common Table Expressions)
Use Cases: Perfect for formatting database queries from application logs, cleaning up auto-generated SQL from ORMs like Sequelize or TypeORM, preparing SQL for code review, or simply making complex queries more readable for documentation and training.
All SQL processing happens in your browser - no server uploads mean your database queries and potentially sensitive data remain private and secure.
Common Use Cases
Frequently Asked Questions
Does this tool support all SQL dialects?
The formatter works with standard SQL syntax and is compatible with MySQL, PostgreSQL, SQL Server, Oracle, and SQLite. However, some database-specific extensions or proprietary syntax may not be recognized. The tool focuses on common SQL keywords and structures.
Will formatting change my query's behavior?
No! Formatting only adds or removes whitespace and changes keyword capitalization. It does not modify the query logic, table names, column names, or any functional aspects. The formatted query will execute identically to the original.
Can I format stored procedures and functions?
The formatter handles basic SQL statements best. Complex stored procedures with procedural logic (IF, WHILE, DECLARE, etc.) may not format perfectly, but basic formatting will still improve readability. For advanced database objects, specialized IDE tools may provide better results.
What is comma-first style and why would I use it?
Comma-first style places commas at the start of lines, making it easier to spot missing commas and to comment out lines without causing syntax errors. Traditional style puts commas at the end of lines. Choose based on your team's preference - both are valid.
Can this format queries with subqueries and CTEs?
Yes, the formatter handles nested SELECT statements, subqueries in WHERE clauses, and WITH clauses (Common Table Expressions). Complex nesting will be indented to show the query structure clearly.
Is my SQL data safe when using this tool?
Absolutely. All SQL formatting happens entirely in your browser using JavaScript - no data is sent to any server. This makes it safe for formatting queries containing sensitive table names, column names, or even literal values in WHERE clauses.
Why are some keywords not being capitalized?
The formatter recognizes common SQL keywords (SELECT, INSERT, UPDATE, DELETE, JOIN, WHERE, etc.), but database-specific functions or less common keywords may not be in the keyword list. The core SQL structure will still be formatted correctly.
Can I use this to validate SQL syntax?
This tool is primarily a formatter, not a validator. It will format valid SQL and attempt to format invalid SQL, but won't give detailed syntax error messages. To validate SQL syntax, test queries against your actual database or use database-specific validation tools.
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