Online Code Formatter & Beautifier Tools
Tidy, minify and validate JavaScript, HTML, CSS, XML, YAML, SQL, Markdown, and PHP in your browser.
- Runs in your browser
- Free, no signup
JavaScript Formatter
Format, beautify and minify JavaScript and ECMAScript code with syntax validation, custom indentation, and zero server uploads.
HTML Formatter
Beautify HTML5 markup with clean tag nesting, indentation, and safe minification preserving inline text and pre elements.
CSS Formatter
Format and minify CSS stylesheets, media queries, and keyframe animations with custom rule spacing and property indentation.
JSON Formatter & Validator
Format, validate, repair, explore as tree, analyze structure, and generate TypeScript/Kotlin/Java models from JSON.
XML Formatter & Validator
Beautify, indent, and minify XML documents. Mixed content is never altered, namespaces are preserved, and DOCTYPE entities are safely checked.
YAML Formatter & Validator
Format, compact and validate YAML configuration files. Handles multi-line block scalars, anchors, aliases, and JSON conversion.
JSON to CSV Converter
Convert JSON arrays and objects to clean CSV/Excel spreadsheets with nested object flattening, custom delimiters, and live table preview.
SQL Formatter
Format complex SQL queries with uppercase keyword casing, clean indentation for JOINs, subqueries, and WHERE clauses.
Markdown Formatter
Format Markdown documents according to CommonMark and GitHub Flavored Markdown (GFM) standards with an interactive live HTML preview.
PHP Formatter
Format PHP source code according to PSR-12 indentation and coding standards. Safe client-side parsing without executing PHP code.
All formatting, beautification, minification, and validation operations run client-side in your browser — your code and data are never uploaded to any server.
Format Studio provides a unified suite of developer tools to format, beautify, minify, and validate code across all major programming languages and data formats. Unformatted code from minified production assets, serialized API payloads, and messy git branches can be tidied instantly.
Designed for frontend engineers, backend developers, database administrators, and technical writers, every formatter runs entirely in your browser. Configurable indentation, syntax highlighting, line numbers, and fast copy/download actions ensure an efficient, distraction-free workflow.
How to use this tool
- Select a language from the Format Studio hub or choose a dedicated formatter from the navigation.
- Paste your code snippet or document into the input editor, or click "Load Sample" to explore an example.
- Choose your preferred indentation level (2 spaces, 4 spaces, or tabs) and language-specific options.
- Click "Format / Beautify" to structure the code, or "Minify" to generate compact production code.
- Copy the formatted output to your clipboard or download a clean file ready for deployment.
100% In-Browser Execution Guarantee
Source code, SQL queries, and configuration files frequently contain proprietary business logic, table schemas, and sensitive application details. Uploading them to remote conversion servers creates unnecessary compliance risks.
Every tool in Format Studio processes data directly inside your browser using client-side JavaScript. No network requests are made, no cookies log your code, and your files never leave your machine.
Consistent Controls and Reusable Formatting Engine
Rather than learning different interfaces for each language, Format Studio provides a consistent layout across all formatters: dual side-by-side editors, synchronized line numbers, character and byte counters, and instant keyboard shortcuts.
Whether you are beautifying a messy SQL query, checking an HTML document for unclosed tags, or minifying a CSS stylesheet, the workflow remains identical and predictable.
Frequently asked questions
Which languages are supported in Format Studio?
Format Studio supports JavaScript (ES6+), HTML5, CSS3, SQL queries, XML, YAML, JSON, Markdown (with live HTML preview), and PHP source code.
Is any of my code sent to a remote server?
No. All parsing, beautification, minification, and validation run 100% locally in your web browser. No code or telemetry is ever uploaded.
Can I minify my code as well as beautify it?
Yes. Formatters for JavaScript, HTML, CSS, SQL, and PHP include dedicated Minify actions that strip comments and redundant whitespace, reporting exact byte savings.
Can I open and download files directly?
Yes. Each tool supports opening local code files from your disk and downloading formatted files with the correct language extension (.js, .html, .css, .sql, .md, .php, .xml, .yaml).