SQL Formatter Online

What is an SQL formatter?

An SQL formatter is a tool that transforms poorly formatted or minified SQL queries into clean, readable code with proper indentation, line breaks, and keyword capitalization. It helps developers write maintainable and error-free SQL.

What SQL dialects are supported?

The formatter supports standard SQL syntax used by MySQL, PostgreSQL, SQLite, SQL Server, and Oracle. It handles common SQL statements including SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, JOIN, and more.

Is my SQL query safe?

Yes. All formatting happens locally in your browser using JavaScript. Your SQL queries are never sent to any server, ensuring complete privacy and security for sensitive database queries.

What formatting options are available?

Uppercase Keywords: Convert SQL keywords (SELECT, WHERE, JOIN) to uppercase. Line Breaks: Add newlines before major clauses. Indentation: Indent subqueries and nested statements for clarity.

How do I use the formatter?

Simply paste your SQL query into the input area and click "Format SQL". The formatted result will appear with syntax highlighting. You can then copy or download the formatted SQL.

Why should I format my SQL?

Formatted SQL is easier to read, debug, and maintain. It helps you spot syntax errors, understand complex query structure, review code changes in version control, and collaborate effectively with team members.

Example: SELECT with JOINs

select u.name,o.total from users u join orders o on u.id=o.user_id where o.status='completed' order by o.created_at desc limit 10

SELECT u.name, o.total
FROM users u
JOIN orders o ON u.id = o.user_id
WHERE o.status = 'completed'
ORDER BY o.created_at DESC
LIMIT 10

Example: INSERT statement

insert into users(name,email,created_at)values('John','john@example.com',NOW())

INSERT INTO users (name, email, created_at)
VALUES ('John', 'john@example.com', NOW())

Example: Complex query with subquery

select * from products where category_id in(select id from categories where name='Electronics')and price>100

SELECT *
FROM products
WHERE category_id IN (
    SELECT id
    FROM categories
    WHERE name = 'Electronics'
  )
  AND price > 100

Example: CREATE TABLE

create table users(id int primary key auto_increment,name varchar(255)not null,email varchar(255)unique,created_at timestamp default current_timestamp)

CREATE TABLE users (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(255) NOT NULL,
  email VARCHAR(255) UNIQUE,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)

SQL formatting best practices

1. Use uppercase for SQL keywords. 2. Place each major clause (SELECT, FROM, WHERE) on a new line. 3. Indent subqueries and nested statements. 4. Use consistent spacing around operators. 5. Add comments for complex logic.

Can I use this for production queries?

Yes! Since all processing happens locally in your browser, it's safe to use with production SQL queries. However, always review formatted SQL before executing it in production environments.