Does successful formatting prove that a query is valid?

No. The tool does not connect to a database, resolve tables or types, execute statements or guarantee semantic validity for a particular server.

Why does the dialect selection matter?

Different databases use distinct keywords, quoting and syntax. Each option selects the corresponding formatter dialect rather than changing only a label.

Can comment removal corrupt a quoted string?

The preprocessing is quote-aware, so comment-like text inside strings or quoted identifiers is retained while actual line and block comments can be removed.

What does SQL minification remove?

It collapses unnecessary layout whitespace after token-aware formatting while retaining separation required to keep SQL tokens distinct.

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SQL Formatter

Reshape SQL for the selected database dialect, control comments and keyword case, or create compact reviewable output.

SQL Dialect

Indentation

Keyword Case

Comments

SQL Input

Upload SQL

Formatted SQL

Format or minify SQL to view the result.

Your SQL is processed locally in your browser and is not uploaded.

How to use SQL Formatter

1
Choose Standard SQL, MySQL, PostgreSQL, SQL Server, SQLite or MariaDB.
2
Set indentation, keyword letter case and whether genuine SQL comments should be retained.
3
Paste a query, upload a local SQL or text file, or load the sample.
4
Click Format for readable layout or Minify for compact SQL.
5
Review the result, then copy it or download formatted.sql.

Frequently asked questions

About SQL Formatter

Readable SQL reveals joins, nested conditions, CTEs and CASE branches that are easy to miss in a dense query. The formatter applies rules for six named dialects and lets developers choose indentation, keyword case and comment treatment before producing output.

Minification is token-aware rather than a blind whitespace deletion, and comment handling respects quoted strings and identifiers. Even so, this remains a presentation utility: it neither connects to a schema nor executes statements. Source files and generated SQL stay within the browser.