JSON Beautifier
Free online JSON formatter — beautify, minify, sort keys, escape. No registration.
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Input
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Free online JSON formatter — beautify, minify, sort keys, escape. No registration.
JSON Beautifier is a browser-based tool for formatting, validating and processing JSON data. Developers regularly deal with raw API responses, configuration files and database dumps — JSON Beautifier transforms unreadable strings into clean, syntax-highlighted code. The tool runs entirely in the browser: no data is sent to a server, making it safe for production data, API keys and sensitive structures.
Paste raw JSON into the left editor panel — the formatted result appears automatically on the right. The tool offers five modes: Beautify adds indentation, Minify strips whitespace to reduce file size, Escape converts special characters into escape sequences for embedding in code strings, Unescape reverses the process, and HTML Export generates colourful ready-to-paste code for documentation. Indentation can be set to 2 spaces, 4 spaces or a tab.
Both panels are powered by Monaco Editor — the same engine behind Visual Studio Code. JSON and HTML syntax highlighting, line numbers and large file support work natively. When JSON contains a syntax error, the tool shows the exact line and column number. Ctrl+Enter forces an instant reformat. Results can be copied to the clipboard or downloaded as a file.
All processing happens client-side — no fragment of your pasted data is sent to a server. This makes it safe for formatting JSON that contains tokens, API keys, personal data or internal system structures. itcoders.pl JSON Beautifier is fully free, requires no registration and works in any modern browser on both desktop and mobile.
Completely safe — all processing is client-side. Your JSON never leaves the browser and is not sent to any server.
Escape converts special characters (quotes, backslashes, newlines) into escaped sequences for embedding JSON inside strings. Unescape reverses the process.
Yes — both panels use Monaco Editor (the engine behind VS Code), which handles large files natively with syntax highlighting and line numbers.
Yes — click Sort Keys to sort all object keys across the entire JSON structure alphabetically.