What is SQL formatting?

SQL formatting (also called SQL beautification) takes compressed or messy SQL statements and re-layouts them with proper indentation, line breaks, and spacing to make the structure clear and easy to read and maintain. Formatting does not change the semantics or execution results of SQL.

Why choose different SQL dialects?

Different database systems (such as MySQL, PostgreSQL, SQL Server, etc.) have subtle differences in SQL syntax, such as keywords, function names, and comment syntax. Choosing the correct dialect allows the formatter to more accurately identify keywords and syntactic structures, producing more standardized formatting results.

What are the benefits of uppercase keywords?

Converting SQL keywords (such as SELECT, FROM, WHERE, etc.) to uppercase is a widely adopted coding convention. Uppercase keywords help developers quickly distinguish SQL structural keywords from table names, column names, and other identifiers, significantly improving SQL statement readability.

Is my SQL code safe? Will it be uploaded?

Completely safe. All SQL processing is done locally in your browser. Statements are never uploaded to any server. You can use this tool even offline. We respect your data privacy.

SQL Formatter

SQL Code Formatting & Beautification

SQL Dialect: Indent Size: Uppercase Keywords

Input SQLChars: 0

Output Result

SQL Formatter Guide

Main Features

SQL Formatting - Automatically beautify SQL with indentation and line breaks
Multi-Dialect Support - Supports MySQL, PostgreSQL, SQL Server, Oracle, SQLite
Custom Indentation - Supports 2 spaces, 4 spaces, and Tab indentation
Keyword Control - Optionally convert SQL keywords to uppercase for readability

Use Cases

Development & debugging: format complex SQL for readability
Code review: format others' SQL for easier logic review
Learning: format minified SQL to understand table structure and query logic
Documentation: paste formatted SQL into tech docs or Wiki

SQL Formatter

SQL Formatter Guide

Main Features

Use Cases

常见问题

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