SQL Formatter
Transform messy, unreadable SQL queries into clean, well-formatted code with our free online SQL Formatter. Whether you are debugging a complex query, sharing SQL with your team, cleaning up legacy database scripts, or preparing queries for documentation, instant formatting makes your code easier to read and maintain. The tool supports all major SQL dialects including MySQL, PostgreSQL, SQLite, SQL Server, Oracle, and standard SQL. Customize indentation, casing for keywords and identifiers, line breaks, and other formatting options to match your team's coding standards. Paste your unformatted SQL and get perfectly formatted output in seconds. The formatter handles nested subqueries, complex JOINs, CASE statements, window functions, and all common SQL constructs.
What Is
A SQL formatter is a developer tool that takes raw, unformatted SQL code and transforms it into a clean, readable, consistently styled format. SQL queries often become difficult to read when written quickly or when modified by multiple developers with different formatting habits. A good SQL formatter applies consistent rules for indentation and line breaks, capitalization of SQL keywords versus identifiers, spacing around operators and commas, alignment of JOIN and WHERE clauses, and proper nesting of subqueries and parentheses. Our free online SQL Formatter goes beyond basic formatting by supporting multiple SQL dialects (MySQL, PostgreSQL, SQLite, SQL Server, Oracle, and ANSI SQL), offering customization options for indent size, keyword casing, and identifier casing. It handles complex queries with nested subqueries, common table expressions (CTEs), window functions, CASE expressions, and string concatenations. The tool runs entirely in your browser, so your SQL code is never sent to any server — ideal for formatting queries that contain sensitive data or proprietary schema information.
How to Use
- Paste your unformatted SQL query into the input area. The formatter handles SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, DROP, and all common SQL statements.
- Select your SQL dialect from the available options including MySQL, PostgreSQL, SQLite, SQL Server, Oracle, or standard ANSI SQL.
- Customize formatting options such as indent size, whether to uppercase SQL keywords and how to handle identifier casing.
- Click the format button to instantly transform your SQL into clean, consistently styled code with proper indentation.
- Copy the formatted SQL output using the copy button or download it as a .sql file for use in your database management tools.
Examples
Input: SQL: SELECT id,name FROM users WHERE active=1 ORDER BY name
Process: Tokenize keywords → Capitalize → Indent clauses → Align
Result: SELECT id, name\nFROM users\nWHERE active = 1\nORDER BY name
Input: Subquery: SELECT * FROM (SELECT id FROM t) sub
Process: Identify nesting → Increase indent → Format inner query
Result: SELECT *\nFROM (\n SELECT id\n FROM t\n) sub
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Frequently Asked Questions
Which SQL dialects are supported?
Our SQL formatter supports all major database dialects including MySQL, PostgreSQL, SQLite, Microsoft SQL Server, Oracle Database, and standard ANSI SQL. Each dialect has its own syntax variations and unique keywords, and the formatter adjusts accordingly. If you are unsure which dialect to choose, the standard ANSI SQL option works well for most queries as it follows the universal SQL standard that all databases support at a minimum.
Does the formatter validate my SQL syntax?
The primary purpose of this tool is formatting, not validation. However, it does detect many common syntax issues and will warn you if it encounters problems while formatting. For full syntax validation, use your database's built-in parser or a dedicated SQL linter. That said, the formatter's error detection can help you spot missing keywords, unmatched parentheses, and other structural issues in your queries.
Can I format very long SQL queries?
Yes, the formatter can handle SQL queries of essentially any length, from simple single-line statements to complex multi-page scripts with hundreds of lines. The tool is optimized for performance and can format even lengthy queries in a fraction of a second because all processing happens locally in your browser. There is no server-side processing limit, so the only practical constraint is your browser's available memory for extremely large files.
Is my SQL code kept private?
Yes, absolutely. All formatting is performed locally within your browser using JavaScript. Your SQL code is never transmitted to any server, stored in any database, or logged in any way. You can verify this by checking your browser's network activity while using the tool — no data leaves your device. This makes it completely safe to use for formatting queries that contain sensitive table structures, business logic, or personal data.
Can I customize the formatting style?
Yes, the formatter offers several customization options to match your preferred coding style. You can adjust the indent size (number of spaces or tabs), choose whether SQL keywords appear in uppercase or lowercase, control how identifiers (table and column names) are cased, and configure other formatting preferences. These settings are saved locally so you do not need to reconfigure them each time you use the tool. The formatter remembers your preferences for a consistent experience across sessions.