SQL Formatter
About Tool
Debugging unformatted SQL queries is a tedious task that often leads to syntax errors and missed logic. When queries are written in a single line or lack consistent indentation, it becomes difficult to identify table joins, subqueries, and complex WHERE clauses. This SQL Formatter cleans up your database queries instantly, making them readable and structured for easier review and documentation.
The tool is particularly useful when you need to share code with teammates or document queries in a technical specification. If your development workflow involves generating data structures from your database, you might also use the JSON to TypeScript tool to map your query results to frontend interfaces. Additionally, if you find errors in the resulting data, the JSON Fixer can help clean up the API responses often associated with modern SQL-based backends.
Dialect and Casing Support
Not all SQL is created equal. This utility allows you to select your specific SQL Dialect, including Standard SQL, PostgreSQL, MySQL, and T-SQL (SQL Server). This ensures that specific syntax nuances are respected during formatting. You can also control the Keyword Case, allowing you to force keywords (like SELECT, FROM, WHERE) into UPPERCASE, lowercase, or preserve their original state, according to your team's style guide.
Practical Steps for Usage
- Paste your raw query into the SQL Input box.
- Choose your database type from the SQL Dialect dropdown.
- Select your preferred Keyword Case (e.g., UPPERCASE).
- Click Format SQL to generate the cleaned query.
- Use Copy Output to grab the formatted code for your SQL client or documentation.
Benefits of Readable SQL
Formatted SQL isn't just about appearance; it's about clarity. Proper indentation helps you quickly see the scope of JOIN operations and the nesting of UNION or CASE statements. It makes peer reviews much faster and reduces the likelihood of logical errors during development. The tool handles large queries efficiently, providing a "pretty-printed" version that can be copied directly into any database management tool.
Frequently Asked Questions
Does this tool execute my SQL query?
No. This is purely a text formatting utility. It does not connect to any database and your query is never executed or uploaded to a server.
Will it remove my comments?
The formatter is designed to preserve comments (both single-line -- and block /* */) to ensure your documentation remains part of the query.
Can it format DDL statements like CREATE TABLE?
Yes, the tool is capable of formatting both DML (SELECT, INSERT, etc.) and DDL statements into a structured, readable format.
What if I have multiple queries in the input?
The formatter can handle multiple queries separated by semicolons, applying consistent rules to each block of SQL code.
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