Online SQL Minifier: Keep Quoted Text Intact

An online SQL minifier should shrink separator whitespace without rewriting text inside quotes. Paste a statement into the tool, create a compact copy, then validate it with the same database and dialect you use in your application.

Minify SQL online without changing quoted text

The tool runs in your browser, removing line comments, block comments, and whitespace between SQL tokens while keeping single-quoted strings, double-quoted identifiers, and backtick-quoted identifiers intact.

A query that searches for New York must keep the two spaces inside the quoted value exactly as you entered them, even when the spaces around SELECT, FROM, and WHERE are reduced.

Try the SQL minifier

Paste formatted SQL into SQL input and select Minify SQL to receive a compact copy while your original statement remains available for comparison.

Select Copy result when you are ready to use the compact query, or select Clear to remove both fields and return focus to the input for another statement.

What the minifier changes

SQL is read as tokens separated by whitespace or comments, and PostgreSQL documents comments as equivalent to whitespace, so removing a comment outside a quoted value can leave a single separator without changing the surrounding tokens.

The minifier removes padding around commas, parentheses, and semicolons without asserting that shorter query text makes a database choose a faster execution plan, because query planning depends on the database, schema, indexes, statistics, and statement itself.

Whitespace can still be required between words that form separate tokens, which is why the tool does not delete every space it encounters. In SELECT id FROM users, the space after SELECT and before FROM keeps the keyword, identifier, and clause separate, while the space before a comma is only formatting.

Comments follow the same rule outside a quoted value. Removing the comment from SELECT id /* selected column */ FROM users must leave one separating space between id and FROM, otherwise the output joins them into a different token sequence.

Quoted strings and identifiers stay intact

A whitespace-only replacement cannot tell the difference between formatting and a value, so the scanner enters a quoted state after it sees a single quote, double quote, or backtick and copies each character until the matching quote closes.

SELECT  'New  York'  AS city,  id
FROM users
WHERE note = 'keep  these  spaces';

The compact result is SELECT 'New York' AS city,id FROM users WHERE note = 'keep these spaces';. The spaces inside both string values remain unchanged, while separator whitespace is reduced.

Comments are removed outside quoted text

The scanner treats double-hyphen line comments and slash-star block comments as removable only when it is outside a quoted state. A comment marker inside a string remains part of that string, which avoids changing stored text or a search value.

For example, SELECT id /* selected column */ FROM users becomes SELECT id FROM users because the tool retains the separator before the next token instead of joining words into an invalid statement.

Validate before you use the result

The minifier is a lexical compaction tool rather than a parser or SQL validator, so it does not repair invalid syntax, inspect a query plan, or promise complete support for every database dialect and every quoting rule.

Run the compact statement through your normal database test or application test before deployment and keep the formatted source in version control for review.

Pay particular attention to vendor-specific quoting, dollar-quoted strings, executable comments, and generated SQL that contains syntax outside the small lexical rules used here, returning to the formatted statement and using a parser that supports that database when the compact form changes a result.

Minification is not a security control because parameterized queries, input validation, and least-privilege database permissions address different risks that remain in the application.

When a SQL formatter is the better tool

Use minification when you need a compact copy for a transport, fixture, or embedded value. If you need to inspect or edit a dense statement, use the online SQL formatter to restore readable indentation.

FAQ

Use these answers to decide whether the minifier fits the statement you are preparing.

Does SQL minification validate my query?

No. It compacts text without checking whether your database accepts the statement. Test the output against the database or application where it will run.

Does pasted SQL leave my browser?

No. The minifier code runs in the page and does not make a network request for the SQL you paste.

Can I minify several SQL statements?

Yes. Separate statements with semicolons, then validate the compact result in the environment that will execute it.