Code Formatter & Beautifier
Format, beautify, and minify JSON, SQL, XML, HTML, and CSS code 100% locally in your browser.
Free Online Multi-Language Code Formatter & Minifier
Format, validate, and minify source code across JSON, SQL, XML, HTML, and CSS formats directly inside your browser.
1. Multi-Format Support
Format JSON data structures, SQL queries, HTML/XML markups, and CSS styling with custom space indentations.
2. One-Click Minification
Remove extra whitespace, newlines, and comments to reduce file payload size for production deployment.
3. Secure Client Execution
No code or sensitive API credentials are ever sent to backend servers. Everything formats locally in memory.
About the Code Formatter
The Code Formatter turns minified or inconsistently indented code into readable, properly nested output. Paste a single-line JSON response from a network tab, an unreadable SQL query pulled from an ORM log, or an XML document with no line breaks, and get consistent indentation back. Syntax errors are reported with their position so malformed input is easy to locate.
How to use the Code Formatter
- Pick the language of your input: JSON, SQL, XML, HTML or CSS.
- Paste the minified or unformatted code.
- Copy the beautified result, or minify it again for production use.
Frequently asked questions
Why does the formatter report an error on my JSON?
JSON is stricter than JavaScript object literals. Trailing commas, single-quoted strings, unquoted keys and comments are all invalid. The error message includes the character position so you can find the offending token quickly.
Does formatting change what my code does?
No. Only whitespace and line breaks are adjusted. Keys, values, statement order and semantics are preserved exactly, so formatted output is functionally identical to the input.
Can I format a very large file?
Yes, within the memory available to your browser tab. Formatting runs locally with no upload limit, though files of many megabytes may take a moment to render.
Related tools
- JSON VisualizerExplore JSON as a collapsible tree. Navigate deeply nested API responses, inspect types and copy paths without scrolling through raw text.
- Format ConverterConvert between JSON, XML, YAML and CSV online. Fast, accurate structural conversion that runs entirely in your browser with no uploads.
- Diff CheckerFree online text diff checker. Compare two strings side-by-side to highlight line additions, deletions, and modifications with character stats. 100% private.
Code Formatter is free to use with no account, no ads and no usage limits. Every calculation runs locally in your browser, so nothing you paste is ever uploaded. See our privacy policy.