SQL Formatter
Format and beautify SQL queries with proper indentation and keyword capitalization. Supports SELECT, INSERT, UPDATE, DELETE, and more.
About SQL Formatter
SQL (Structured Query Language) is the universal language for relational databases, used by MySQL, PostgreSQL, SQLite, SQL Server, Oracle, and dozens of other database systems. Complex queries with multiple JOINs, subqueries, and aggregations can become extremely difficult to read when written on a single line. A SQL formatter transforms dense, unreadable queries into properly structured code with keyword capitalization, logical line breaks, and consistent indentation -- making complex queries understandable at a glance.
SQL Formatting Best Practices
The most widely adopted SQL style guide recommends uppercase for SQL keywords (SELECT, FROM, WHERE, JOIN) and lowercase for table and column names. Each major clause (SELECT, FROM, WHERE, ORDER BY, GROUP BY) should start on a new line. Column lists in SELECT statements should have one column per line when there are more than 2-3 columns. JOIN conditions should be on the same line as the JOIN keyword or indented directly below it.
AND/OR conditions in WHERE clauses are typically indented one level and placed on separate lines for clarity. Subqueries should be indented inside their parentheses. For complex queries with CTEs (Common Table Expressions using WITH), each CTE should be clearly separated. This formatter handles all standard SQL operations including SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, and window functions across all major database dialects.
Frequently Asked Questions
What SQL dialects are supported?
The formatter handles standard SQL keywords used across MySQL, PostgreSQL, SQLite, SQL Server, and Oracle. It focuses on formatting structure rather than dialect-specific syntax.
Does the formatter validate SQL?
No, the formatter only restructures the whitespace and capitalization. It does not parse or validate the SQL syntax. Invalid SQL will still be formatted based on keyword patterns.