📖 Description

1. Core Application Scenarios

Complex Query Auditing: Rearrange multi-layered nested JOIN and UNION statements to clarify data flow.
Log Extraction & Organization: Quickly beautify compressed, messy raw SQL fragments extracted from program logs or monitoring tools.
Team Standardization: Unify SQL writing styles within the team (e.g., keyword capitalization, indentation standards).
SQL Injection Analysis: Clearly expose abnormal SQL structures through formatting to assist security audits.

2. Core Feature Analysis

This site's tool is not just a text line breaker. It provides deeply customizable formatting capabilities through lexical analysis technology:

A. Multi-Database Dialect Support (Dialect Compatibility)

Perfectly compatible with mainstream database syntaxes such as MySQL, PostgreSQL, Oracle, SQL Server (TSQL), SQLite, and MariaDB.

B. Intelligent Layout Optimization

Automatic Keyword Capitalization: Instantly convert keywords like select, from, where, group by to standard uppercase, enhancing semantic recognition.
Hierarchical Indentation: Automatically handles indentation alignment for AND/OR logic, subquery nesting, and CASE...WHEN structures.
Long Statement Line Wrapping: Automatically wraps lines at commas, operators, or keywords to avoid horizontal scrolling.

C. Compression & Minification (Minify)

Provides an "SQL Minify" function to remove all comments, extra spaces, and line breaks, generating a compact version suitable for script execution or network transmission.

D. Security & Performance Preview

Integrated syntax highlighting distinguishes core keywords, string constants, table names, and field names through color, making the logical structure clear at a glance.

3. Operation Process Overview

Input Source Code: Paste your SQL text into the "Input Window".
Preference Settings: * Select the number of indentation spaces (recommended 2 or 4).

Check "Keyword Uppercase" to enhance readability.

Format: Click the "Beautify SQL (Format)" button.
Copy & Export: After previewing and confirming satisfaction, click "Copy Code" or directly download as a .sql file.

4. Before & After Formatting Example

Before Formatting:

SQL

select id,name,score from students where score>90 and class_id in (select id from classes where school='本站') order by score desc

After Formatting (Processed by This Site):

SQL

SELECT
  id,
  name,
  score
FROM
  students
WHERE
  score > 90
  AND class_id IN (
    SELECT
      id
    FROM
      classes
    WHERE
      school = '本站'
  )
ORDER BY
  score DESC;

5. Why Choose This Online SQL Formatter?

Local Privacy Protection: All parsing and formatting logic is performed entirely locally in your browser. Your sensitive database structures, query logic, and business data are never uploaded to a server, ensuring 100% data security.
Extremely Fast Response: Relying on an efficient JavaScript lexical engine, even complex SQL stored procedures spanning thousands of lines can be formatted instantly.
No Registration Required: Open and use immediately, free from any pop-ups or subscription restrictions—a pure workspace for developers.
Fully Platform Compatible: Responsive interface design allows for easy viewing and organizing of SQL even on tablets or mobile devices.

SQL Formatter