SQL Formatter
Format and beautify SQL queries with proper indentation across MySQL, PostgreSQL and other dialects.
Format and beautify SQL queries with proper indentation across MySQL, PostgreSQL and other dialects.
This free SQL Formatter from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the SQL Formatter
- Paste your input - JSON, regex pattern, JWT, URL etc.
- Pick any flags or options the tool supports.
- Click the action button (Format, Test, Decode).
- Copy the result or download it as a file.
What you can do with the SQL Formatter
- Format and validate API responses while debugging.
- Test regex patterns against real input before deploying.
- Decode JWTs to inspect claims and expiry.
- Generate UUIDs for migrations, tests and seeders.
Why use KX Toolkit's SQL Formatter
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Bookmark the most-used tools - your browser bookmark bar is faster than retyping the URL every time.
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If you find this tool useful, explore the full Developer Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
Does SQL formatting change the query plan?
No. SQL is whitespace-insensitive, so reformatting only changes how the query reads, not how the database executes it. The optimizer parses tokens, builds a plan, and ignores formatting entirely. The benefit is purely human: easier review, quicker debugging, and cleaner version control diffs when someone tweaks a join.
Which SQL dialects does the formatter support?
Modern formatters detect or accept a dialect option for MySQL, PostgreSQL, SQL Server (T-SQL), Oracle PL/SQL, SQLite, BigQuery, Snowflake, and Redshift. Picking the right dialect matters because each has unique keywords like LIMIT vs TOP or BACKTICKS for identifiers. Using a generic mode on dialect-specific syntax sometimes breaks indentation or quoting.
Should keywords be uppercase or lowercase?
It is purely a style choice. Uppercase keywords (SELECT, FROM, WHERE) make the structure visible at a glance and were standard for decades. Lowercase has become popular in modern style guides because it pairs well with lowercase identifiers and reduces visual noise. Pick one and let the formatter enforce it across the codebase.
Why does my CTE or subquery look poorly indented?
CTEs (WITH clauses) and nested subqueries are where formatters differ most. Some indent the inner query relative to the WITH, others align it under the parenthesis. If the result feels cramped, increase the line-width option so the formatter has more room to break joins and where clauses cleanly. Manual tweaking is sometimes needed for complex queries.
Is it safe to format SQL that contains string literals or comments?
Yes. The formatter tokenizes the input first, so anything inside single quotes, double quotes, or backticks is preserved verbatim. Multi-line comments inside slash-star and single-line dash-dash comments survive too. The one risk is dialect-specific quoting like dollar-quoted strings in PostgreSQL - confirm your formatter handles them before running it on production scripts.
Should I commit pre-formatted SQL into version control?
Yes. Format SQL files like any other code so diffs show real changes instead of whitespace noise. Run the formatter via a pre-commit hook to keep style consistent without manual effort. For SQL embedded in application code (PHP, Python, JS), you generally cannot format the inline strings, so reserve formatting for standalone .sql files.
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