SQL Formatter

A fast, dialect-aware SQL formatter that outputs readable, standardized SQL for reviews, migrations, and code audits in teams and across projects.

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1,084+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how SQL Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

The tool accepts a raw SQL string and outputs a formatted version. It supports multiple dialects, either auto-detected or explicitly chosen, and focuses on readability and consistency.
It builds a structured, AST-based representation of the input and reprints it with configurable indentation, line breaks, and keyword casing, without altering semantics.
Users include developers, DBAs, data engineers, and QA analysts who need reliable diffs, clean code reviews, and reproducible formatting across teams.
In addition to basic formatting, it offers dialect-specific tweaks, comment preservation, and optional line wrapping to accommodate large queries or migration scripts.

Paragraph continuity helps maintain context across scripts and minimizes churn in code reviews. The formatter operates as a purely declarative rewriter of SQL text, not a database client or executor.

Save your calculation history with a free account

How to Use

Provide inputs: paste the SQL string and select a dialect or enable auto-detect.
Configure options: set indentation size, keyword casing, and whether to preserve comments or wrap lines.
Run formatting: invoke the formatter to produce a new, formatted SQL string.
Review outputs: inspect the result, adjust options if needed, and re-run.
Export or copy: copy to clipboard or export the formatted script to your repository or IDE.

Frequently Asked Questions

Find Quick Answers

Will the formatter execute SQL against a database?

No. The formatter operates strictly as a string transformer on SQL text. It does not connect to any database, execute statements, or verify runtime semantics. Its goal is to produce a consistent, readable representation suitable for diffs and reviews.

Which dialects are supported?

Supported dialects include ANSI SQL, PostgreSQL, MySQL, SQL Server, and Oracle, with optional mode-specific rules. Users may let the tool auto-detect or explicitly select a dialect to guide keyword casing, punctuation, and clause layout.

What happens on syntax errors?

When input cannot be parsed or uses unsupported syntax, the formatter returns the original input with a non-fatal warning. No partial formatting is applied that could misrepresent the code.

Can I preserve comments?

Yes. Comment preservation can be enabled to keep inline and block comments in place. The formatter also aligns comments with clauses when possible, improving readability without altering semantics.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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