What JSON Beautifier does
JSON Beautifier parses the entire document with the browser's JSON parser and serializes the parsed value with the selected indentation. Four spaces is the initial presentation, while two spaces, tabs, and compact output remain available.
Parsing means formatting is not a byte-for-byte whitespace edit. Insignificant spacing disappears, escape spelling can be normalized, and object property order follows JavaScript parsing and serialization behavior rather than an external canonicalization standard.
How to use JSON Beautifier
- Paste a complete JSON value into the input area.
- Choose four spaces, two spaces, tabs, or minified output.
- Select Format JSON and resolve any parser error shown.
- Review the structure, then copy or download the formatted JSON document.
Important details
Valid JSON is required
Keys and string values must use double quotes; comments, trailing commas, undefined, NaN, and JavaScript object-literal syntax are rejected by JSON.parse.
Beautifying changes presentation
JSON.stringify produces a fresh textual representation of the parsed data. It preserves represented values but not original whitespace, escape choices, or formatting history.
Practical uses
- Expand a compact API sample for code review or debugging.
- Apply consistent indentation before committing a small configuration file.
- Minify a valid JSON fixture after inspecting its structure.
Privacy and limitations
Parsing and serialization occur locally, and JSON input is not sent to PagesTools. Clipboard, browser extensions, downloads, and the current device remain outside that page-level boundary.
Input is limited to two million characters and browser memory. The tool does not validate a JSON Schema, sort keys, preserve comments, provide canonical JSON, stream huge documents, or guarantee a meaningful semantic order for properties.