How to use SQL Checker
- Start by adding the SQL you want to check into SQL Checker.
- Set Dialect so the output fits your use case.
- Watch the output update instantly while you adjust the SQL.
- When it looks right, Copy to save it.
About this tool
Everything SQL Checker does happens on your own device. SQL Checker formats or processes SQL in your browser, tidying the statement you paste without changing its logic.
Keywords and indentation are normalised for readability. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
What does SQL Checker do?
SQL Checker lets you check your input right in the browser using the Dialect control, with the result shown instantly and nothing uploaded.
Is SQL Checker free to use?
Yes — SQL Checker is completely free, with no usage limits.
Is my input private in SQL Checker?
Yes — your input never leaves your device; SQL Checker does all the work in your browser.
Which SQL dialects does SQL Checker understand?
SQL Checker formats the common dialects in your browser and never sends your queries to a server.
Does SQL Checker work on mobile?
Yes — SQL Checker is just a web page and runs on any modern browser, including phones and tablets.