Will minifying change what my query does?

No. Only comments and insignificant whitespace are removed. Text inside single-quoted strings, double-quoted identifiers, and backtick identifiers is preserved exactly, including repeated spaces and newlines.

Which SQL dialects does it support?

It works at the character level, so it suits MySQL, PostgreSQL, SQL Server, SQLite, and Oracle. It understands -- line comments, /* block */ comments, and doubled-quote escapes. MySQL # comments are not treated as comments because # is an operator in PostgreSQL.

What are /*! ... */ comments and why keep them?

In MySQL and MariaDB, /*! ... */ is a conditional comment that the server actually executes, often used in dumps for version-specific syntax or optimizer hints. They are kept by default; untick the option to strip them as ordinary comments.

Is my SQL sent anywhere?

No. Minification happens in your browser with plain JavaScript, so queries containing table names or data never leave your device.

SQL MINIFIER

Strip comments and extra whitespace from SQL for compact, copy-ready queries. Strings stay intact and nothing is uploaded.

SQL

Keep MySQL /*! ... */ conditional comments

Minified

SELECT id,name,email FROM users WHERE active=1 AND country='United  States' ORDER BY created_at DESC LIMIT 50;

Original

172 B

Minified

110 B

Saved

36.0%

Text inside quotes ('strings', "identifiers", `backticks`) is never altered. Comments are removed and whitespace collapsed; the query itself is not parsed or validated.

How to minify SQL

1
Paste your SQL query or script into the input box.
2
The minified version appears instantly, with comments removed and whitespace collapsed. Toggle whether MySQL /*! ... */ conditional comments are kept.
3
Check the byte savings, then click Copy to use the compact SQL in your code or config.

Questions

Will minifying change what my query does?: No. Only comments and insignificant whitespace are removed. Text inside single-quoted strings, double-quoted identifiers, and backtick identifiers is preserved exactly, including repeated spaces and newlines.
Which SQL dialects does it support?: It works at the character level, so it suits MySQL, PostgreSQL, SQL Server, SQLite, and Oracle. It understands -- line comments, /* block */ comments, and doubled-quote escapes. MySQL # comments are not treated as comments because # is an operator in PostgreSQL.
What are /*! ... */ comments and why keep them?: In MySQL and MariaDB, /*! ... */ is a conditional comment that the server actually executes, often used in dumps for version-specific syntax or optimizer hints. They are kept by default; untick the option to strip them as ordinary comments.
Is my SQL sent anywhere?: No. Minification happens in your browser with plain JavaScript, so queries containing table names or data never leave your device.