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SQL Formatter

Format raw SQL with dialect support for SQL Server, MySQL, PostgreSQL, SQLite, and more.

Updated

6 dialects Size stats Browser-based

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What this page sends

  • Your input: Processed in this tab and not sent to a server.
  • Share links: Share links put a Base64 copy of your input and output in the URL itself (after #d=). Anyone with the link can read it, so don't share a link that contains secrets.
  • Editor: On desktop screens the code editor (Monaco) is downloaded from cdn.jsdelivr.net; phones get a built-in lightweight editor instead.
  • Page load: Loading the page requests HTML, scripts and images from ByteKiln, fonts from Google Fonts, and sends Google Analytics page views, tool-usage events and catalog interactions (tool/category IDs, result status and whether a click followed search — never your input, output or search terms). Privacy & sharing

How the SQL Formatter Works

The ByteKiln SQL Formatter applies dialect-aware formatting to your queries: uppercase keywords, consistent indentation, and proper line breaks between clauses. Your query is formatted in your browser, not on a ByteKiln server.

What does SQL formatting do?

Formatting standardizes keyword casing (SELECT, FROM, WHERE) and adds indentation so queries are easier to read in code reviews, documentation, and debugging sessions. Query logic is never changed.

How do dialects affect formatting?

Each SQL engine has slightly different conventions. Selecting MySQL, PostgreSQL, T-SQL, PL/SQL, or SQLite adjusts the output's keyword rules, spacing, and quoting style to match that engine's expected format.

Does it change my query logic?

No. The formatter is purely cosmetic — it only adjusts whitespace and casing. Table names, column names, values, and query logic remain completely untouched.

Limitations

  • It is a formatter, not a parser: invalid SQL is usually re-indented rather than rejected, so a clean layout is not proof the query runs.
  • Formatting comes from the sql-formatter library's rules per dialect. Procedural code (T-SQL batches with GO, PL/pgSQL function bodies, MySQL DELIMITER blocks) and vendor extensions can be laid out awkwardly.
  • Only whitespace and keyword case change. It doesn't rewrite joins, quote identifiers, or check that tables and columns exist.
  • Comments are kept, but their position relative to the surrounding clause can move.

FAQ

Short answers for the things developers usually ask before trusting a tool.

What SQL dialects does the ByteKiln SQL Formatter support?

The formatter supports six dialects: Standard SQL, MySQL, PostgreSQL, SQL Server (T-SQL), PL/SQL (Oracle), and SQLite. Each dialect applies the correct keyword casing and syntax conventions for that database engine.

Does this formatter change my SQL logic?

No. The formatter only adds whitespace and adjusts keyword casing. It never modifies table names, column names, query logic, or data values. The formatted output is semantically identical to the input.

Can I format multiple SQL statements at once?

Yes. Paste multiple statements separated by semicolons. The formatter processes each statement independently and adds blank lines between them for readability.

Is my SQL query sent to a server?

No. The SQL Formatter runs in your browser, so your query is not sent to a ByteKiln server or logged by the tool. If you press Share, the link itself carries a readable copy of your input, so don't share links that contain secrets.

Why does keyword case matter in SQL formatting?

While SQL keywords are case-insensitive in most databases, consistent casing (typically UPPER for keywords like SELECT, FROM, WHERE) makes queries significantly easier to read and review, especially in code reviews and documentation.

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Want the background and worked examples? There's a longer write-up.

Read the SQL Formatter guide

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