Free Online Code Formatters
Messy, minified, or machine-generated code is painful to read and even harder to debug. These free online formatters clean it up in one click: paste your JSON to beautify and validate it with exact error locations, compress JSON or CSS for smaller payloads, or convert between CSV and JSON in either direction — spreadsheet exports into a structured JSON array, or a JSON array back into spreadsheet-ready CSV.
Every formatter runs entirely in your browser using native parsing APIs, so your data — API responses, config files, customer exports — never touches a server. There is nothing to install, no account to create, and no size-limit paywall. Format, copy, and get back to work.
All Formatters Tools (7)
JSON Formatter & Validator
Format, validate, and beautify JSON data instantly. Paste minified JSON and get readable, indented output in one click — free and 100% client-side.
Launch ToolCSV to JSON Converter
Convert CSV data into a structured JSON array — paste comma-separated rows and get formatted JSON instantly. Free, client-side CSV to JSON converter.
Launch ToolJSON to CSV Converter
Convert a JSON array of objects into CSV rows instantly — paste JSON, get spreadsheet-ready CSV with proper comma and quote escaping. Free, client-side.
Launch ToolJSON Minifier
Minify JSON by stripping all whitespace — reduce payload size for faster API responses and smaller files. Free, instant, client-side JSON minifier.
Launch ToolCSS Minifier
Minify CSS online — strip whitespace and compress stylesheets for smaller files and faster page loads. Free, instant, client-side CSS minifier.
Launch ToolCSS Beautifier
Reformat minified or compressed CSS into readable, indented code instantly — the reverse of minifying. Free, client-side CSS beautifier and unminify tool.
Launch ToolJSON Diff Checker
Compare two JSON objects and see exactly which keys were added, removed, or changed — ignores whitespace and key order. Free, client-side JSON diff tool.
Launch ToolFrequently Asked Questions
- What's the difference between formatting and minifying JSON?
- Formatting (beautifying) adds indentation and line breaks for readability; minifying strips all whitespace to shrink the payload. Both preserve the exact same data — format while you're editing, minify before you ship.
- Can I convert between CSV and JSON in both directions?
- Yes — CSV to JSON reads spreadsheet exports into a JSON array, and JSON to CSV reverses it with proper comma/quote escaping, so you can round-trip data between the two formats entirely in your browser.