SQL Minifier
Fast, accurate, and free online SQL Minifier tool that runs directly in your browser.
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Other tools you may find usefulSQL Minifier - Reduce and Optimize SQL Queries
SQL Minifieris an online tool that shortens SQL queries by removing unnecessary spaces, tabs, newlines and comments. The resulting SQL is functionally identical but takes up less space and is ready to use in API, log, and compact formats.
What is SQL minification?
SQL minification is the process of removing from SQL code all elements necessary for human readability, but unnecessary for the database engine: multiple spaces, tabs, newlines, indentations and comments (-- single-line comment, /* multi-line comment */). The resulting query is syntactically and semantically identical to the original.
When should you minify SQL?
API Submission- When SQL queries are submitted via API (e.g. in a JSON query body), minification reduces the size of the transferred data.System logs- Minimal SQL in logs is more readable on one line and easier to search with grep/awk.Production code- ORMs and query builders often generate formatted SQL for debugging; it is worth minifying it before implementing it into production.Memory saving- in systems storing SQL queries (e.g. query cache, query store), minification reduces memory consumption.
What does the SQL minifier do?
Tool: removes leading and trailing whitespace, replaces multiple consecutive spaces with a single space, removes tabs and indents, removes newlines (converts to spaces), removes single-line (--) and multi-line comments (/* */), preserves spaces in text literals (strings in quotation marks), normalizes SQL keywords (optional - to uppercase).
Example of operation
Input (extended query with formatting):SELECT
u.id,
u.name
FROM users u
-- Filter active only
WHERE u.active = 1
AND u.created_at > '2024-01-01';
Output (minified):SELECT u.id, u.name FROM users u WHERE u.active = 1 AND u.created_at > '2024-01-01';
FAQ
Does SQL minification change query behavior?
No - SQL minification only removes whitespace and comments, which are ignored by the SQL engine. The query after minification is semantically identical to the original and will return exactly the same results. The only change is human readability - minified SQL is more difficult to parse.
Is SQL minification safe for queries with text literals?
Yes, as long as the minifier understands SQL syntax. A good SQL minifier does not modify the contents of string literals - spaces and special characters inside quotes or single quotes are preserved unchanged. The tool on webp.pl handles this correctly.
Can I minify queries for MySQL, PostgreSQL and SQL Server?
Yes - the basic SQL syntax is standard ANSI SQL and works with MySQL, PostgreSQL, SQL Server, SQLite and Oracle. Specific dialect extensions (e.g. PostgreSQL-specific $$ delimiters, MySQL backtick identifiers) may require additional support - check the output after minification for queries using dialect extensions.
How to minify SQL in PHP, Python or Java code?
In PHP you can use a simple regular expression or the sql-formatter library. Python has the sqlfluff and sqlparse packages. In Java - JSqlParser. For simple cases:preg_replace('/\s+/', ' ', trim($sql))in PHP is enough, but this will not remove comments - you need an SQL parser for that.
What is the difference between minification and SQL formatting?
These are the reverse operations: SQL formatting (prettify/beautify) indents, newlines, and formats the code for human readability. Minification removes these elements for machine compactness. Formatting is used during development, minification - in production and API environments.