Code Formatter — Beautify JSON, CSS, JS & YAML Auto-detect and format many languages at once.
100% offline
Input146 chars · 3 lines
Output
Paste code — the language is detected and formatted automatically.
                                                                                                                       
 
 
 
About Code Formatter — Beautify JSON, CSS, JS & YAML
 
This free online code formatter is the all-in-one front door to clean, consistent code. Paste JavaScript, TypeScript, JSON, CSS, SCSS, LESS, HTML, Markdown, GraphQL, or YAML and it auto-detects the language, then reformats it with Prettier — no need to pick the right tool first.
It solves the everyday friction of having a snippet from who-knows-where and just wanting it tidy. Leave it on Auto and the language is guessed from the content, or override the guess from the dropdown when you know better. The detected language is shown so you always know what happened.
Everything runs entirely in your browser. The Prettier engine is loaded locally, so nothing you paste is uploaded — this online formatter works offline and keeps your code private.
 
 
 
Features
 
     
  •   One box for many languages — JS, TS, JSON, CSS, SCSS, LESS, HTML, Markdown, GraphQL, YAML 
  •   Auto-detects the language from the content, with a manual override 
  •   Powered by Prettier for consistent, opinionated output 
  •   Runs fully in your browser — offline and private, nothing is uploaded 
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How to use
 
     
  1. Paste your code into the input pane.
  2. Leave the language on Auto-detect, or pick the language from the dropdown.
  3. Click Format — the detected language is shown above the result.
  4. Copy the formatted output, or clear and start again.
    5.  
 
 
 
Frequently asked questions
 
 
 Which languages does the formatter support? 
JavaScript, TypeScript, JSON, CSS, SCSS, LESS, HTML, Markdown, GraphQL, and YAML — all through Prettier, the same engine used by the dedicated formatters in this suite.
 
 How does auto-detection work? 
It inspects the content for tell-tale signals — angle brackets for HTML, valid JSON braces, YAML key/value lines, Markdown headings, CSS selectors, and so on — and picks the matching parser. If the guess is wrong, override it from the language dropdown.
 
 Is my code sent to a server? 
No. The Prettier engine runs locally in your browser. Your code never leaves your device, so the formatter works offline and keeps everything private.
 
 When should I use a dedicated formatter instead? 
This hub is the convenient catch-all. For language-specific extras — JSON repair and key sorting, HTML minify, CSS minify — reach for the dedicated JSON, HTML, or CSS tools.
 
 
 
 
 
Related tools
 
   JavaScript Beautifier & Minifier — Unminify Code Pretty-print or minify JavaScript — great for un-minifying bundles.   CSS Formatter — Beautify & Minify (SCSS/LESS) Format or compress CSS, SCSS, and LESS.   HTML Formatter — Beautify & Minify HTML Online Beautify or minify HTML offline.   JSON Formatter, Validator & Beautifier Format, validate and minify JSON  
 
 
 
Everything runs locally in your browser — your input is never uploaded.