SQL Formatter
SQL Formatter formats your SQL queries for improved readability and consistency. The tool runs entirely in your browser, ensuring your code is never uploaded or stored externally.
SQL Formatter is a browser-based tool that formats SQL code across five dialects, including Standard SQL, MySQL, PostgreSQL, SQLite, and T-SQL, using the sql-formatter library with a nearley parser. It supports customizable keyword casing, indentation with 2-space options, and line spacing adjustments between queries. Processing happens locally in your browser, which enhances privacy by preventing any data upload. For structured data formatting, consider using related tools like Json Formatter for JSON and Xml Formatter for XML files.
How to Use SQL Formatter
- Paste or write your SQL query into the input area.
- Select your SQL dialect from Standard SQL, MySQL, PostgreSQL, SQLite, or T-SQL.
- Choose your preferred keyword case: UPPER, lower, or preserve.
- Adjust indentation settings, typically 2 spaces, and set line spacing between queries if needed.
- Click the format button to generate a clean, readable SQL output.
How It Works
This tool leverages the sql-formatter library, which uses a nearley parser to analyze SQL syntax and structure accurately. It supports complex SQL constructs such as SELECT, INSERT, UPDATE, DELETE statements, JOINs, subqueries, common table expressions (CTEs), and CREATE TABLE statements. The formatter applies consistent indentation, keyword casing, and spacing based on user preferences, improving both readability and maintainability of SQL scripts. Because the processing occurs entirely within your browser's JavaScript engine, no query data leaves your machine, preserving confidentiality.
Example
-- Input SQL (unformatted):
SELECT id,name,age FROM users WHERE age>21 ORDER BY name;
-- Formatted SQL Output:
SELECT id, name, age
FROM users
WHERE age > 21
ORDER BY name;
When to Use SQL Formatter
- As a developer, to clean up complex queries for better debugging and collaboration.
- For database administrators optimizing scripts before execution.
- Designers integrating SQL queries into applications who need consistent formatting.
- SEO specialists analyzing database-driven content generation for clarity.
- Students learning SQL syntax and wanting clear, standardized examples.
For formatting related data formats, try Json Formatter for JSON files and Css Minifier for CSS code optimization.
Frequently Asked Questions
Which SQL dialects does SQL Formatter support?
SQL Formatter supports five dialects: Standard SQL, MySQL, PostgreSQL, SQLite, and T-SQL (Microsoft). Each dialect's specific syntax is recognized and formatted accordingly to maintain correctness and style.
How does SQL Formatter ensure my query privacy?
All formatting is performed locally in your browser using JavaScript. No SQL code or data is sent to a server, ensuring that your queries remain private and secure.
Can I customize keyword casing and indentation?
Yes, the tool allows you to choose keyword casing options such as UPPERcase, lowercase, or preserve the original case. Indentation is configurable, with a default of 2-space indentation, and you can also adjust line spacing between queries.
Does the tool handle complex SQL queries like CTEs and subqueries?
Yes, SQL Formatter can parse and format complex SQL constructs including common table expressions (CTEs), subqueries, JOINs, and CREATE TABLE statements, thanks to the nearley parser integration.
Is the formatted SQL output suitable for production environments?
The output is formatted for readability and follows best practices in SQL styling, which helps in code reviews and maintenance. However, the formatter focuses on style, not query optimization or execution planning.