SQL Formatter

SQL Formatter is a powerful online tool that automatically beautifies and standardizes your SQL queries, enhancing code readability and maintainability.

Main Features

Multiple Database Support Supports 18 mainstream SQL dialects, including MySQL, PostgreSQL, BigQuery, Oracle PL/SQL, Microsoft T-SQL, SQLite, MariaDB, Hive, Spark SQL, Snowflake, Redshift, and more. No matter which database system you use, you'll get accurate formatting results.

Automatic Formatting Instantly formats SQL queries as you paste them, without manual button clicks. The tool intelligently handles indentation, line breaks, keyword alignment, and other formatting issues, making complex SQL statements structurally clear.

Flexible Style Configuration Provides rich formatting options for customization:

• Indentation method (spaces or tabs) and width
• Case style for keywords, data types, and function names (preserve, uppercase, lowercase)
• Indentation style (standard, tabular left, tabular right)
• Logical operator line break position (before or after)
• Expression width control
• Number of blank lines between multiple queries
• Compact operator mode
• Semicolon line break settings

Usage Instructions

1. Enter or paste SQL query statements in the text box
2. Select the corresponding SQL dialect (default is standard SQL)
3. The tool will automatically format in real-time and display results below
4. If you need to adjust the formatting style, expand the "Advanced Options" panel for configuration
5. Click the copy button to copy the formatted code

Formatting Example

Before formatting:

SELECT * FROM users WHERE age > 18 AND status='active' OR role IN ('admin','moderator') ORDER BY created_at DESC LIMIT 10

After formatting (standard style):

SELECT
  *
FROM
  users
WHERE
  age > 18
  AND status = 'active'
  OR role IN ('admin', 'moderator')
ORDER BY
  created_at DESC
LIMIT
  10

Use Cases

• Organizing SQL statements copied from logs or monitoring tools
• Unifying team code style and formatting standards
• Debugging and analyzing complex multi-table queries
• Preparing SQL examples for presentations or technical articles
• Learning SQL syntax structure and best practices

Notes

The tool only processes SQL statement formatting and does not modify query logic or perform any database operations. The formatting process is entirely local in the browser, and your SQL code will not be uploaded to a server.

The identifier case option is an experimental feature and may not correctly identify all identifier types in some complex scenarios. Use with caution.