Format Code Online Without VS Code — Browser-Based Prettier for JS, CSS, HTML, JSON

You can format JavaScript, CSS, HTML, JSON, TypeScript, and GraphQL code in your browser using the same Prettier engine that VS Code uses. No installation, no configuration files, no extension management. Paste code, click format, copy the result. Here is when and why to use it instead of your editor.

Browser Formatter vs VS Code Prettier

	Browser Formatter	VS Code + Prettier Extension
Formatting engine	✓ Official Prettier	✓ Official Prettier
Output quality	✓ Identical	✓ Identical
Installation	✓ None — open browser, paste code	✗ Install VS Code + Prettier extension
Configuration	✓ UI dropdowns (tab width, quotes, etc.)	~.prettierrc file or settings.json
Supported languages	JS, TS, CSS, HTML, JSON, GraphQL	Same + plugins for more
Format on save	✗ No (paste + click)	✓ Yes — automatic on Ctrl+S
Whole project formatting	✗ One file at a time	✓ Format entire project via CLI
Works offline	✓ After page loads	✓ Always
Works on any device	✓ Any browser	✗ Needs VS Code installed
Privacy	✓ Code never leaves device	✓ Local processing

When to Use the Browser Formatter

• Quick snippet formatting: Someone pastes messy code in Slack, email, or a support ticket. Copy → paste into browser formatter → copy formatted result. 5 seconds vs opening an editor
• Shared or locked-down machines: Library computers, school labs, client offices, pair programming stations where you cannot install software
• Code review: Reading a pull request with messy formatting. Paste the function into the browser formatter to see it clean before commenting
• VS Code Prettier broken: Conflicting formatters, corrupted extension, wrong workspace config. Format your code now, fix VS Code later
• Teaching and presentations: Quickly beautify code examples during a demo without switching to an editor
• Non-developers: Content writers, PMs, or QA who need to read or paste formatted code but do not have a dev environment set up

When VS Code Is Still Better

• Format on save: If you want every file formatted automatically when you hit Ctrl+S — that requires an editor with a Prettier extension
• Whole project formatting: Running npx prettier --write . to format every file in a repo is a CLI task, not a browser task
• Custom plugins: PHP, Ruby, Svelte, and other languages need Prettier plugins — these run in Node.js, not the browser
• Team configuration: Shared .prettierrc files ensure everyone on a team uses identical settings. Browser tools use your one-off settings

Formatting Options Available

Option	Default	Alternatives	What It Does
Tab width	2 spaces	4 spaces	Indentation depth
Quotes	Double "..."	Single '...'	String quote style (JS/TS)
Semicolons	Yes	No	Add/remove trailing semicolons (JS/TS)
Trailing commas	All	None, ES5	Comma after last item in lists
Print width	80	60, 100, 120	Max characters per line before wrapping

Languages We Support (and Do Not Support)

Language	Supported	Notes
JavaScript	✓ Yes	ES6+, JSX, modules
TypeScript	✓ Yes	TSX, type annotations, generics
CSS	✓ Yes	Selectors, media queries, variables
HTML	✓ Yes	Attributes, nesting, embedded scripts
JSON	✓ Yes	Objects, arrays, nested structures
GraphQL	✓ Yes	Queries, mutations, schema definitions
SQL	✗ Use SQL Formatter	Dedicated SQL tool with dialect support
Python	✗ Not supported	Use Black or autopep8 locally
Java	✗ Not supported	Use google-java-format locally
C# / Go / Ruby / PHP	✗ Not supported	Use language-specific formatters

Developer Toolkit

• Code Formatter — format JS, CSS, HTML, JSON, TS, GraphQL
• JSON Formatter — validate, beautify, and minify JSON
• SQL Formatter — format SQL with dialect support
• Code Minifier — minify JS, CSS, HTML
• Code Diff — compare two code snippets with syntax highlighting
• Diff Checker — general text comparison
• Regex Tester — test regular expressions in real-time
• JSON to Zod — convert JSON to TypeScript Zod schemas