Pretty Print
Code Formatter

Pretty Print supports six common code formats: JSON (JavaScript Object Notation), XML (Extensible Markup Language), SQL (Structured Query Language), YAML (YAML Ain't Markup Language), CSS (Cascading Style Sheets), and HTML (HyperText Markup Language). Each format has specialized formatting rules to ensure proper indentation and structure.

The formatter analyzes your input to detect the format automatically. It looks for characteristic patterns: JSON starts with { or [, XML starts with <?xml or <tag>, SQL begins with keywords like SELECT or INSERT, YAML has key: value patterns, CSS contains selectors with braces and semicolons, and HTML has standard HTML tags. You can always override the detection by selecting a format manually.

No. All processing happens entirely in your browser using JavaScript. No code, data, or content is ever transmitted to any server. This means your sensitive code, API responses, database queries, and configuration files remain completely private. The tool works fully offline once the page is loaded.

Yes! This tool is specifically designed to handle minified code. It can expand single-line minified CSS into properly indented, readable stylesheets. For JavaScript, you can format JSON objects and configuration. Note that obfuscated or transpiled JavaScript may not format as cleanly as the original source code.

JSON has strict syntax requiring double quotes around all keys and string values, no trailing commas, and no comments. JavaScript objects are more flexible - they allow unquoted keys, single quotes, trailing commas, and methods. This tool formats valid JSON. If you have a JavaScript object with unquoted keys, you may need to add quotes manually first.

YAML is extremely sensitive to whitespace and indentation. This tool normalizes YAML indentation to 4 spaces per level, which helps catch hierarchy errors. If your YAML fails to parse, check for mixed tabs and spaces, incorrect indentation levels, or missing colons after keys. The formatted output shows the correct structure visually.

Pretty Print uses 4 spaces per indentation level for all formats. This is a widely-accepted standard that provides good readability without excessive horizontal scrolling. The tool uses spaces instead of tabs for consistent rendering across different text editors and viewers.

The SQL formatter handles standard SQL syntax and works with most common dialects including MySQL, PostgreSQL, SQL Server, SQLite, and Oracle. It formats keywords to UPPERCASE (SELECT, FROM, WHERE, etc.) and adds line breaks for better readability. Dialect-specific syntax is preserved during formatting.

Yes! You have two options: click the "Upload File" button to select a file from your computer, or simply drag and drop any file directly onto the input area. The tool accepts .json, .xml, .sql, .yaml, .yml, .css, .html, .htm, .js, and .txt files. The format is auto-detected from the file content, and you can also use the file extension as a hint if content detection is ambiguous.

Yes! Simply drag any supported file from your file explorer and drop it directly onto the input text area. The input area will highlight with a visual indicator when you drag over it. Dropping a file will clear any existing content, load the file contents, and automatically detect the format. This works for all supported file types including JSON, XML, SQL, YAML, CSS, HTML, and JavaScript files.

You have two options: click "Copy" to copy the formatted code to your clipboard, or click "Download" to save it as a file. The download filename includes the appropriate extension based on the detected format (e.g., formatted.json, formatted.sql). You can also select all text in the output area and copy manually.