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Remove spaces, line breaks, and comments from SQL statements. Minify SQL into a single line of code to save storage space and improve transfer efficiency.
SQL minification preserves quoted text, executable comments, hints, and significant line breaks. MySQL/MariaDB uses default backslash escaping; check statements that use a nondefault SQL_MODE.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Paste a query or script to remove text beginning with -- through the line ending and text between /* and */. It then replaces each run of whitespace characters with one ordinary space and trims the ends. Punctuation spacing is not optimized, and the result may still contain spaces around commas, operators, and parentheses. This is a straightforward text transformation; the selected dialect does not make it a parser or syntax checker.
SQL engines read keywords, identifiers, literals, operators, and comments according to dialect-specific lexical rules. PostgreSQL documentation, for example, explains that whitespace separates tokens and that quoted strings can contain arbitrary characters. This minifier does not recognize quoted strings before looking for comment markers. A value such as '-- keep this text' can therefore be cut at the dashes, and /* ... */ inside a literal can also be removed. Dialect-specific quoting and nested comments create further risks. PostgreSQL's rules are useful context, not a promise about every database.
For a plain query whose comments are outside literals, a multiline statement such as:
SELECT id, name
FROM users -- fields
WHERE active = 1;becomes SELECT id, name FROM users WHERE active = 1;. The line comment and line breaks disappear; the remaining word separators stay in place. Treat this as a compact text copy, then inspect it against the source.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Duplicate the readable SQL before pasting. Do not overwrite a migration, stored procedure, or production query with a version that has lost comments and line breaks.
Start with a query whose literals and dialect features you understand. The minifier processes non-empty input and shows compacted text. Its dialect selector does not change the text-removal rules.
Compare quoted strings, quoted identifiers, comment markers, whitespace-sensitive values, semicolons, and statement boundaries. Pay extra attention to text that contains -- or /*.
Use the result as a transport or embedding copy after checking it. Keep the formatted source as the version you maintain.
The page reports character and line counts and a reduction based on the text lengths. That figure describes the characters removed from this input; it does not measure database execution speed, network savings, or equivalence of query results.
Use cases
See how the tool fits into real work and everyday tasks.
If a configuration value or issue form is easier to handle on one line, compact a simple, already reviewed query and check that line-comment removal did not consume following SQL.
A team can compare the before and after character counts to see how much whitespace and comment text were removed. Use the count as a text-size observation only.
For procedures, dynamic SQL, templates, nested comments, or strings containing comment syntax, use a dialect-aware parser and test in a safe environment instead of relying on this text pass.
Q&A
Find concise answers to common questions and confusing cases.
It is not guaranteed. The tool removes comment patterns and folds whitespace without parsing literals or dialect syntax; inspect and test the result before relying on it.
No. The selector does not alter the basic minification rules or validate the query for that database.
No. Removed comments and original line breaks are not retained in the output. Keep the source copy if you may need to edit it later.
Notes
Review scope, result limitations, and important precautions before use.
Use minified SQL as a candidate text copy, not as proof of valid syntax or equivalent behavior. Keep the original, compare important literals and delimiters, and run reviewed output only in an appropriate test environment before production use.
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