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SQL Minifier

SQL Minifier - a browser-based developer tools utility.

Browser tool

About SQL Minifier

Collapsing a query onto one line by stripping comments and newlines, for the places that cannot take a multi-line string: a configuration value, a command-line argument, a log entry, a cell in a spreadsheet. Free, with no registration. The query is collapsed in your browser rather than uploaded anywhere.

How to use it

  1. Paste the queryFormatted, commented, however it currently looks.
  2. Take the single lineWhitespace collapsed and comments removed, with string literals left exactly as they were.
  3. Keep the readable versionMinified SQL is for machines. The copy humans maintain should stay formatted.

What is safe to collapse and what is not

Whitespace between tokens carries no meaning in SQL, so collapsing it cannot change a result. Whitespace inside a string literal does, and so does a line break inside a single-line comment — remove the newline and everything after the comment marker is swallowed by it. A parser therefore does this work rather than a search and replace, because anything unable to tell a keyword from the same letters inside quotation marks will hand back a query that runs and answers the wrong question.

What it does not do

  • Comments are discarded, and a comment explaining why a query is written a particular way is often the most valuable line in it. Minify a copy, not the source.
  • Minifying does not make a query faster. The database parses it either way, and the saving is in transport bytes, which is negligible.

Questions people ask

Does minifying improve performance?
No. The query planner works on the parsed statement, and whitespace is discarded long before anything is executed. The reason to minify is fitting a query somewhere that will not take line breaks.
Is it safe to strip comments?
From a copy, yes. From your source, only if the comments genuinely say nothing — and in SQL they usually explain an index hint or a non-obvious join, which is exactly the knowledge nobody wants to reconstruct later.

Questions about ToolsVerse itself — privacy, cost, what happens to your files — are answered in the frequently asked questions.

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