SQL Formatter & Beautifier

This free online SQL formatter turns messy, single-line, or inconsistently indented SQL into clean, readable queries. Paste your SQL, pick your dialect, choose your indentation and keyword casing, and click Format SQL — the beautified result appears instantly, ready to copy or download. Everything runs locally in your browser.

It is built for developers who read and write SQL every day: backend, database, and data engineers, and especially C#, .NET, and ASP.NET Core developers working with SQL Server and T-SQL.

A SQL formatter (or SQL beautifier) automatically organizes a SQL query into a consistent, readable structure. It adds indentation and line breaks, aligns clauses, and can normalize keyword casing. Formatting improves readability, maintainability, code reviews, debugging, and collaboration — particularly for complex queries.

Formatting changes presentation only. It does not change what your query does, and it does not improve query execution performance.

1. Copy your SQL query.
2. Paste it into the SQL formatter above.
3. Select your SQL dialect (SQL Server / T-SQL by default).
4. Choose indentation, keyword case, and AND/OR line breaks.
5. Click Format SQL (or press Ctrl/⌘ + Enter).
6. Copy or download the formatted query.

• Better readability — complex queries become easy to scan.
• Easier debugging — JOINs and WHERE conditions line up clearly.
• Better code reviews — reviewers understand logic faster.
• Consistent code — teams share one formatting style.
• Easier maintenance — future changes are safer to make.

The terms are often used interchangeably. A SQL formatter usually emphasizes consistent formatting and indentation, while a SQL beautifier emphasizes making complex SQL easier to read. This tool combines both: consistent structure and highly readable output.

The formatter supports these dialects:

• SQL Server / T-SQL (Transact-SQL)
• PostgreSQL
• MySQL
• MariaDB
• SQLite
• Generic SQL

Choosing the right dialect helps the formatter parse dialect-specific syntax such as parameter styles and quoted identifiers. Highly proprietary constructs may not be fully supported; when a query can't be parsed, the tool says so rather than producing incorrect output.

Messy joins become instantly readable. Before:

SELECT u.Id,u.Name,o.OrderDate,o.TotalAmount FROM Users u INNER JOIN Orders o ON u.Id=o.UserId LEFT JOIN Payments p ON o.Id=p.OrderId WHERE u.IsActive=1 ORDER BY o.OrderDate DESC;

SELECT
    u.Id,
    u.Name,
    o.OrderDate,
    o.TotalAmount
FROM Users u
    INNER JOIN Orders o ON u.Id = o.UserId
    LEFT JOIN Payments p ON o.Id = p.OrderId
WHERE
    u.IsActive = 1
ORDER BY o.OrderDate DESC;

Formatting helps most with nested subqueries, CTEs (Common Table Expressions), CASE expressions, multiple JOINs, GROUP BY, HAVING, and UNION / UNION ALL. Consistent indentation makes the structure of a large query obvious at a glance, which makes it far easier to review and modify safely. Use Load example above to see a CTE + JOIN + CASE query formatted end to end.

Developers working with Microsoft SQL Server often deal with T-SQL, stored procedures, CTEs, temporary tables, variables, and transactions. Select the SQL Server / T-SQL dialect to format these where the underlying formatter supports them. For example:

DECLARE @UserId INT = 10;

SELECT
    Id,
    Name
FROM Users
WHERE Id = @UserId;

We support what the formatter genuinely supports and don't claim perfect coverage of every proprietary T-SQL feature.

If you write SQL inside C# for Dapper, Entity Framework, or ADO.NET, well-formatted SQL keeps embedded queries readable in your source. Formatting does not change parameterization — it only changes presentation:

var users = await connection.QueryAsync<User>(
    """
    SELECT
        Id,
        Name,
        Email
    FROM Users
    WHERE IsActive = @IsActive
    ORDER BY Name;
    """,
    new { IsActive = true });

Prefer parameterized queries (as above) over string concatenation.

Formatting improves readability — it does not improve security. Specifically:

• Formatting does not prevent SQL injection.
• Formatting does not validate query security.
• Always use parameterized queries.
• Never concatenate untrusted user input into SQL.

Prefer parameters:

var sql = """
    SELECT Id, Name
    FROM Users
    WHERE Id = @UserId;
    """;

Avoid string concatenation:

var sql = "SELECT * FROM Users WHERE Id = " + userId;

Yes — your SQL stays in your browser. This formatter processes your queries locally using JavaScript, and your SQL is never uploaded to our server, logged, stored in localStorage or cookies, sent to analytics, or added to the URL. That said, always handle sensitive production queries responsibly and avoid pasting credentials or secrets into tools you do not trust.

What is a SQL formatter?

A SQL formatter is a developer tool that automatically organizes a SQL query into a consistent, readable structure — adding indentation, line breaks, and consistent keyword casing so complex queries are easier to read and maintain.

How do I format SQL online?

Paste your SQL into the input, choose your SQL dialect and formatting options, and click Format SQL. The beautified query appears on the right, ready to copy or download. Everything runs in your browser.

Is this SQL formatter free?

Yes. It is completely free with no sign-up and no usage limits.

What SQL dialects are supported?

SQL Server (T-SQL), PostgreSQL, MySQL, MariaDB, SQLite, and a generic SQL mode. Dialect support comes from the underlying formatter, so we list exactly what is supported rather than claiming universal compatibility.

Can I format SQL Server queries?

Yes. Choose the SQL Server / T-SQL dialect. Common T-SQL syntax such as variables, CTEs, and stored-procedure-style statements is supported where the underlying formatter supports it.

Can I format T-SQL?

Yes, using the SQL Server / T-SQL dialect. Some proprietary T-SQL features may not be fully supported; when a query can't be parsed, the tool tells you instead of guessing.

Can I format PostgreSQL queries?

Yes. Select the PostgreSQL dialect to format Postgres-flavored SQL, including numbered parameters like $1.

Can I format MySQL queries?

Yes. Select the MySQL (or MariaDB) dialect for MySQL-flavored SQL, including backtick-quoted identifiers.

Can I format complex SQL queries?

Yes. The formatter handles multiple JOINs, subqueries, CTEs (WITH), CASE expressions, GROUP BY, HAVING, UNION, and more — which is exactly where consistent formatting helps the most.

What is the difference between SQL formatting and SQL beautification?

The terms are used interchangeably. Formatting emphasizes consistent indentation and structure; beautification emphasizes making complex SQL easy to read. This tool does both.

Does formatting SQL change the query?

No. Formatting only changes whitespace, indentation, line breaks, and (optionally) keyword casing. It does not change the intended execution logic of your query.

Does SQL formatting improve query performance?

No. Formatting changes the presentation of SQL, not how the database executes it. Query performance depends on the database engine, indexes, and query plan — not on whitespace.

Is my SQL uploaded to a server?

No. All formatting happens locally in your browser using JavaScript. Your SQL is never uploaded, logged, or stored, and it never appears in the URL.

Can I format stored procedures?

Support for stored-procedure-style SQL depends on the selected dialect and the formatter engine. Common statements format well; highly proprietary constructs may not be fully supported.

Can this tool validate SQL?

No. Formatting and validation are different capabilities. This tool formats and beautifies SQL; it does not validate query correctness or execute your SQL.