Sql Formatter
Format and beautify your SQL code with customizable indentation and dialect support. Improve readability of SQL queries instantly.
Result
Please check your inputs.
How to Use This Tool
Paste or type your SQL code into the input area.
Choose your desired SQL dialect (e.g., MySQL, PostgreSQL, SQL Server) from the dropdown to ensure correct syntax handling.
Adjust indentation settings—set the number of spaces per indent or select tab indentation.
Click the 'Format' button to instantly beautify your query.
Copy the formatted SQL output or download it as a file for use in your project.
What Is Sql Formatter?
SQL Formatter is a developer tool that automatically restructures raw, messy SQL queries into clean, readable, and consistently indented code. It parses your SQL statements and re-applies proper spacing, line breaks, and keyword casing based on the dialect you select. This matters because poorly formatted SQL is hard to debug, review, or share with a team. By making queries visually organized, you reduce errors, speed up code reviews, and improve collaboration. Whether you work on complex data pipelines or simple CRUD operations, a formatter saves time and enforces best practices without manual effort.
Formula
The tool uses a parser-based reformatting engine that follows these steps: 1) Lexical analysis splits the input into tokens (keywords, identifiers, operators). 2) A syntax tree is built for the given SQL dialect to understand statement boundaries and clause hierarchy. 3) The tree is traversed and output with configurable indentation—each nested clause (e.g., SELECT, FROM, WHERE) gets one level of indentation. 4) Whitespace is normalized: extra spaces are removed, line breaks are inserted after major keywords and before JOIN, ON, AND, OR (based on settings). 5) Keyword casing (uppercase/lowercase) is applied if desired. The result is a logically structured, human-readable query.
Tips for Best Results
🔍 Always select the correct SQL dialect first—misaligned dialect settings can break formatting or misinterpret reserved words.
📏 Use 2-space indentation for narrow screens or 4-space for wide editors; tabs are best for teams with mixed preferences.
🔄 Run the formatter before committing SQL files to version control—consistent formatting reduces merge conflicts and diffs.
⚡ For very long queries, break them into smaller CTEs (Common Table Expressions) first, then format each piece separately for maximum clarity.
Frequently Asked Questions
Will the formatter preserve my comments and string literals?
Yes, the tool recognizes SQL comments (single-line -- and multi-line /* */) as well as string constants. They are kept intact and only whitespace around them is adjusted. No text inside comments or strings is modified.
Can I format PL/SQL or T-SQL procedural blocks?
The tool supports many dialects including Oracle PL/SQL and Microsoft T-SQL. It will format stored procedures, functions, triggers, and loops by indenting BEGIN/END blocks and control flow statements appropriately.
Does the tool work offline or need internet access?
The web version requires an internet connection to load the page, but the formatting logic runs entirely in your browser (client-side JavaScript). Once the page is loaded, you can format queries offline without sending data to any server.