SQL Formatter
Format and beautify SQL queries
Formateador SQL
Formatea consultas SQL para mejorar su legibilidad. Soporta SELECT, INSERT, UPDATE, DELETE, CREATE TABLE y otras sentencias comunes. El formateo se realiza localmente en tu navegador.
Online SQL Formatter - Beautify and Organise SQL Queries
Why does formatting SQL queries matter?
Unformatted SQL is hard to read, maintain and debug. A SELECT with several JOINs and subqueries crammed onto one line is close to unreadable. SQL formatting puts each clause (SELECT, FROM, WHERE, JOIN, GROUP BY, ORDER BY) on its own line with consistent indentation, aligns columns and conditions, and exposes the logical structure of the query. That reduces mistakes, makes code review easier, improves team collaboration and speeds up maintenance. Well formatted SQL is also easier to optimize, because the structure is visible at a glance.
SQL formatting conventions and best practices
Several SQL formatting conventions are in common use. The most widespread put reserved words in uppercase (SELECT, FROM, WHERE) to separate them from identifiers, place each main clause on a new line, list SELECT columns vertically with commas either leading or trailing (both styles are accepted), indent JOINs to show the table hierarchy, align and logically group WHERE conditions, and indent subqueries one extra level. This tool applies a standard formatting that improves readability regardless of which SQL dialect you write.
Supported SQL dialects and how they differ
SQL is a standard (ISO/IEC 9075), but every database system speaks its own dialect. MySQL uses backticks for identifiers, LIMIT for pagination and functions such as IFNULL. PostgreSQL uses double quotes, has native arrays and offers LIMIT with OFFSET. SQL Server uses square brackets, TOP instead of LIMIT, and T-SQL for stored procedures. Oracle has its own syntax for hierarchies (CONNECT BY), sequences and ROWNUM. This formatter handles the syntax common to all of them, preserving dialect-specific functions while applying consistent formatting.
If you work with this tool, you will probably also find these useful CSV to JSON, JSON Formatter, YAML/JSON Converter, Markdown Preview.
Frequently asked questions
Does the formatter change the logic of my queries?
No. The formatter only changes whitespace, line breaks and indentation. The SQL logic stays exactly the same: identifiers, values, operators and query structure are untouched. You can format production queries with confidence.
Can I customise the formatting style?
This tool applies a standard style tuned for readability. For advanced customisation such as tabs versus spaces, comma placement or specific capitalisation rules, look at IDE tooling such as VS Code extensions or a SQL linter like SQLFluff, which lets you define your own style rules.
Does it work with stored procedures and functions?
The formatter mainly targets DML statements (SELECT, INSERT, UPDATE, DELETE) and basic DDL such as CREATE TABLE. Stored procedures with procedural logic (IF, WHILE, DECLARE) are only partially formatted, so complex procedural code may need manual adjustment afterwards.
How does it handle nested subqueries?
Subqueries are indented automatically according to their nesting level. A subquery inside FROM, WHERE or SELECT is formatted as an independent query with its own structure, which makes deeply nested statements far easier to follow.