Ever squinted at a long SQL query crammed onto one line? A flat query is slow to read, and small mistakes hide easily. The SQL Formatter takes a single-line query and spreads the main clauses onto their own lines.
It also sets known keywords like select and from in uppercase. This tool helps developers, analysts, and students read a query faster. The output updates as you type.
Table of Contents
- What the SQL Formatter Does
- How to Use It, Step by Step
- How the Formatter Works
- Worked Example
- How to Read the Results
- What the Tool Does Not Do
- Limitations and Assumptions
- FAQs About the SQL Formatter
What the SQL Formatter Does
The tool does two jobs on the query you paste. It finds known SQL keywords and sets them in uppercase. It also starts a new line before each major clause.
- Uppercase Keywords: words like select, from, where, and order by become SELECT, FROM, WHERE, and ORDER BY.
- Line Breaks On Clauses: major clauses move to the start of a fresh line for easier reading.
- Formatted Lines: a count of how many lines the output now holds.
- Keywords Uppercased: a count of the keywords the tool changed to uppercase.
- Status: a small label that reads Formatted or Empty.
- Copy Query: one button copies the formatted output to your clipboard.
The output updates as you type, and it also runs once when the page loads.
How to Use It, Step by Step
- Paste or type your query into the Input Raw SQL Query box.
- Watch the Pretty SQL Query Output box fill in as you type.
- Press the Format SQL button if you want to run it again.
- Check the three cards for line count, keyword count, and status.
- Press Copy Query to copy the result; the button shows Copied when it works.
- Paste the formatted query into your editor or a document.
How the Formatter Works
There is no math here. The tool uses a fixed list of SQL keywords and simple text matching. Each keyword is matched as a whole word, and case does not matter during the search.
Major clauses get a line break added in front of them. These include SELECT, FROM, WHERE, GROUP BY, ORDER BY, HAVING, and LIMIT. Other keywords, such as AND, OR, ON, and DESC, are only set to uppercase.
Raw One-Line Query→Uppercase Keywords→New Line Per Clause=Formatted Output
After the swaps, the tool drops a blank line at the top and merges repeated blank lines. It then trims trailing spaces from each line. The clean text goes into the output box.
Worked Example
Suppose Priya pastes this short query into the input box. The query sits all on one line in lowercase.
select name, email from customers where city = 'Austin' order by name asc limit 5;
The tool returns the five-line result shown in the table below. The keyword count reaches six.
| Line | Output Text |
|---|
| Line 1 | SELECT name, email |
| Line 2 | FROM customers |
| Line 3 | WHERE city = 'Austin' |
| Line 4 | ORDER BY name ASC |
| Line 5 | LIMIT 5; |
The matched keywords are SELECT, FROM, WHERE, ORDER BY, ASC, and LIMIT. That gives a Keywords Uppercased value of six. The Formatted Lines card reads five.
How to Read the Results
Formatted Lines counts the lines in the output box. More clauses usually mean more lines, which is easier to skim.
Keywords Uppercased counts only the keywords the tool changed to uppercase. A word already in uppercase is not added to the total.
Status shows Formatted after a run with text. It reads Empty when the input box is blank.
The Pretty SQL Query Output box holds the final query. It is read only, so edit the copy you paste elsewhere.
What the Tool Does Not Do
This is a light display helper, not a parser. It does not check your query for errors or warnings. A query with a typo still gets formatted the same way.
Sub-clauses joined by AND and OR stay on the line above them. For a real syntax check, try the SQL validator.
If you want case changes with no line breaks, the keyword uppercase tool does that one job. To strip a query back to one line, use the SQL minifier.
For deeper layout and spacing, compare the output with the SQL beautifier. Fans of structured data can also try the JSON formatter, and more options live in the developer tools hub.
Limitations and Assumptions
- There is no indentation, column alignment, or wrapping of long lines.
- It does not change spacing inside a line, only clause breaks and trailing spaces.
- There is no size limit, so a very large query may feel slow in the browser.
FAQs About the SQL Formatter
Is the Formatted Query Safe to Run?
Yes, in most cases. The tool leaves text inside quotes and comments exactly as you typed it. Still read the output first, since it checks no logic.
Does It Work With MySQL, PostgreSQL, or SQL Server?
It does not detect your database engine. Common clauses like SELECT and WHERE format the same in each one. Engine-only keywords may stay in lowercase.
Why Did a Column Named Order Move to a New Line?
A bare name that matches a keyword, like order or set, is treated as that keyword. Wrap the name in quotes, backticks, or brackets to protect it.
Is My SQL Sent to a Server?
No. All of the work runs in your browser with JavaScript. The query is not uploaded or stored, so you can format private queries safely.
Can I Undo the Formatting?
There is no undo button for the line breaks and case changes. Keep a copy of your original query before you format it, to be safe.
This calculator gives general estimates only and is not professional advice. Reviewed for general accuracy by Prof. Dr. Khalil Mudassar, PhD.