SQL Formatter
Beautify, format, and indent messy database queries instantly. Supports multiple SQL dialects including MySQL and PostgreSQL.
How to Use
- Paste your messy or minified SQL query into the left panel.
- Select the appropriate SQL Dialect (e.g., MySQL, PostgreSQL) to ensure database-specific functions are formatted correctly.
- Choose your preferred keyword casing (UPPERCASE is standard) and indentation size.
- Click Format SQL to beautify the code instantly.
Features
Deep Beautification
Perfectly indents complex nested subqueries and JOINs.
Multi-Dialect
Supports native syntax for 6+ major database engines.
Case Enforcement
Automatically capitalizes SQL keywords for readability.
Privacy First
All parsing happens entirely in your web browser.
Use Cases
- Code Review: Format massive, single-line queries exported from ORMs or application logs so humans can actually read them.
- Query Optimization: Break down complex legacy queries into readable sections to identify performance bottlenecks.
- Documentation: Standardize SQL formatting across your team before pasting queries into wikis or GitHub pull requests.
- Debugging: Find missing commas or unmatched parentheses in deeply nested
CASE WHENstatements.
Why Format SQL?
Databases do not care about spaces, tabs, or newlines. Because of this, developers and software libraries often write queries on a single continuous line to save space (or due to poor logging mechanisms). While the database engine parses this perfectly, humans cannot. Proper SQL formatting aligns keywords (like SELECT, FROM, and WHERE), indents nested subqueries, and makes complex JOIN conditions instantly understandable, drastically reducing the time it takes to debug data issues.
The Developer Tool Suite
If your SQL data is eventually outputted as JSON, you can validate it using our JSON Validator. If you need to convert JSON records back into CSV for database imports, try the JSON to CSV Converter. For testing simple HTML and JS scripts alongside your data, use the Online Code Editor.
Frequently Asked Questions
Does formatting change how the query executes?
No. Standardizing whitespace, indentation, and keyword capitalization has absolutely zero impact on how the database engine executes the query or its performance.
What does "SQL Dialect" mean?
Different databases (like MySQL vs PostgreSQL) have unique keywords, data types, and functions. Selecting the correct dialect ensures the formatter recognizes those specific keywords and indents them correctly.
Is my proprietary database schema secure?
Yes. The formatting engine runs 100% locally in your web browser via JavaScript. Your queries, table names, and sensitive database schemas are never sent to a server.
Will it fix syntax errors in my query?
No, this tool only adjusts formatting and whitespace. If you have an invalid SQL query (e.g., a misspelled table name or missing keyword), the tool will format what you wrote but cannot fix the logic.
Is it free?
Yes, 100% free with no limits.