Code Formatter - Beautify JS, HTML, CSS, SQL & PHP

Code Formatter for JavaScript, HTML, CSS, SQL, Python & PHP

This code formatter turns messy, minified, or inconsistently indented source code into clean, readable code. Pick a language, paste your code, and it beautifies automatically with consistent indentation and tidy line breaks.

It is built for developers who want to format code online before committing or sharing it, students learning proper indentation, reviewers untangling dense snippets, and technical writers preparing clean examples. Six languages are covered, each powered by a dedicated, industry-standard engine.

Private by design: all formatting runs entirely in your browser using JavaScript libraries (Prettier, sql-formatter, js-beautify). Your code is never uploaded, stored, or logged on any server.

How to Format Code Online

Select a language

Click a language tab at the top: JavaScript, HTML, CSS, SQL, Python, or PHP. Each tab loads the right formatting engine and options.

Paste or upload your code

Type or paste code into the Input panel on the left, or use Upload to load a file from your device. Click Sample to drop in example code for the current language.

Adjust the format options

Set the indent size (2, 3, 4, 8 spaces, or Tab) and any language-specific options, such as Print Width, quotes and semicolons for JavaScript, or keyword case and dialect for SQL.

Copy or download the result

The formatted code appears in the Output panel with syntax highlighting. Use Copy to send it to your clipboard or Download to save it with the correct file extension.

Code formats automatically a moment after you stop typing. Press Ctrl+Shift+F to format immediately, or hit Tab in the input to insert indentation.

Features

Six Languages, Dedicated Engines

Format JavaScript, HTML, CSS, and PHP with Prettier, SQL with sql-formatter, and Python with js-beautify.

JavaScript Formatting

Prettier with the Babel parser, plus controls for print width, semicolons, single or double quotes, and trailing commas.

HTML & CSS Formatting

Tidy HTML with attribute wrapping and bracket positioning, and clean CSS with a configurable print width.

SQL with Dialects

Choose keyword case and a dialect: Standard SQL, MySQL, PostgreSQL, MSSQL, or Oracle, each with its own syntax rules.

Customizable Indentation

Indent with 2, 3, 4, or 8 spaces, or use Tab characters. The setting applies to every language and updates the output instantly.

Syntax-Highlighted Output

Prism.js color-codes keywords, strings, comments, and numbers, and the theme adapts automatically to light and dark mode.

Editable Output

Click Edit to switch the output to a full CodeMirror editor with line numbers for quick manual tweaks. It loads on demand.

Real-Time Formatting

Code reformats automatically a moment after you type, or instantly with Ctrl+Shift+F, so you see clean results as you work.

Upload, Download & Copy

Load a code file from your device, copy the result with one click, or download it with the correct extension (.js, .html, .css, .sql, .py, .php).

Status & Stats

A status bar shows Ready, Formatted, or Error states along with the line count and file size of the formatted output.

Frequently Asked Questions

What does a code formatter do?

It rewrites your source code with consistent indentation, spacing, and line breaks so it is easier to read, without changing what the code does. It is the opposite of minifying, which strips whitespace to make code smaller.

Does formatting change how my code runs?

No. Formatting only adjusts whitespace and layout, such as indentation, line breaks, and spacing. The logic and behavior of your code stay exactly the same.

Which languages are supported?

Six languages: JavaScript, HTML, CSS, SQL, Python, and PHP. Because the JavaScript tab uses Prettier with the Babel parser, you can also paste TypeScript or JSX into it.

Is my code uploaded to a server?

No. All formatting happens entirely in your browser using JavaScript libraries (Prettier, sql-formatter, and js-beautify). Your code never leaves your device and nothing is saved or logged.

What formatting engines are used?

Prettier handles JavaScript, HTML, CSS, and PHP, sql-formatter handles SQL, and js-beautify handles Python indentation. These are the same tools many developers use inside their code editors.

What does Print Width mean?

Print Width sets the maximum number of characters per line. The formatter tries to wrap lines that exceed this limit. You can choose 80, 100, or 120 characters.

What SQL dialects are supported?

Standard SQL, MySQL, PostgreSQL, MSSQL (Transact-SQL), and Oracle (PL/SQL). Each dialect has its own syntax rules that affect how the query is formatted. You can also set the keyword case to UPPER, lower, or Preserve.

Can I edit the formatted output?

Yes. Click the Edit button in the output panel to switch to an interactive CodeMirror editor with line numbers, then make manual adjustments and copy or download the result. Click View to return to the read-only, syntax-highlighted display.

Why does my code show an error?

The formatter reports an error when the input contains syntax it cannot parse. Fix the syntax issue in the input panel and it will reformat automatically.