🔧 SQL Formatter

Format and beautify SQL queries with syntax highlighting and error detection

SQL Query:

Paste your SQL query here - supports all major SQL dialects

SQL Dialect:

Choose your database dialect for optimal formatting

Indentation:

Number of spaces for indentation

Keyword Case:

How to format SQL keywords

Line Breaks:

Add line breaks for better readability

Line Breaks

Syntax Highlighting:

Apply color coding to SQL elements

Syntax Highlighting

Formatted SQL Query

Formatted SQL (MYSQL)

SELECT u.id, u.name, u.email, COUNT(o.id) AS order_count
FROM users u
LEFT JOIN orders o ON u.id = o.user_id
WHERE u.created_at > '2023-01-01'
GROUP BY u.id, u.name, u.email
HAVING COUNT(o.id) > 0
ORDER BY order_count DESC, u.name ASC;

Formatting Summary

Dialect: MYSQL

Keywords: UPPER

Indentation: 2 spaces

Line Breaks: Yes

Syntax Highlighting: Yes

Lines: 7

🔧

JavaScript Required:

This tool requires JavaScript for interactive functionality. The sample above demonstrates expected output. Please enable JavaScript for full tool features.

How to Use This SQL Formatter

Basic Usage:

Fill in the required fields above
Adjust any optional settings as needed
Click the button to generate your result
Copy or download the output

Tips: This sql formatter provides instant results and works entirely in your browser for privacy.

How It Works

How Our SQL Formatter Works

Parse and Validate

The formatter first parses your SQL query and performs basic validation checks including parentheses matching, quote balancing, and common syntax errors. Any issues are highlighted with warnings before formatting begins.

Apply Dialect-Specific Rules

Based on your selected database dialect (MySQL, PostgreSQL, SQL Server, Oracle, SQLite), the formatter applies dialect-specific keyword recognition and formatting rules to ensure compatibility with your database system.

Format Structure and Keywords

Major SQL clauses (SELECT, FROM, WHERE, JOIN, etc.) are arranged on separate lines with proper indentation. Keywords are converted to your preferred case (UPPERCASE, lowercase, or preserved), and consistent spacing is applied throughout.

Apply Syntax Highlighting

When enabled, syntax highlighting colorizes different SQL elements: keywords in blue, strings in red, numbers in teal, and comments in gray. This visual enhancement makes complex queries easier to read and debug.

Generate Clean Output

The final formatted SQL maintains all original functionality while providing improved readability through consistent indentation, proper line breaks, and professional formatting standards that make code reviews and maintenance much easier.

When You Might Need This

• Complex query formatting for stored procedures and functions
• Database migration script preparation and standardization
• Code review preparation with consistent formatting standards
• ORM-generated query debugging and optimization analysis
• API endpoint SQL query documentation and maintenance

Frequently Asked Questions

Which SQL dialects are supported by the formatter?

The tool supports all major SQL dialects including MySQL, PostgreSQL, SQL Server, Oracle, SQLite, and standard ANSI SQL, with dialect-specific formatting rules and keyword recognition.

Does formatting change query performance or functionality?

No, the formatter only changes whitespace, indentation, and keyword case. It preserves all query logic, table names, column names, and functional elements exactly as written.

Can the tool detect SQL syntax errors?

Yes, the formatter includes basic syntax validation that can identify common SQL errors like missing parentheses, unmatched quotes, and invalid keyword usage.