JSON Beautifier

What is the JSON Beautifier?

The JSON Beautifier expands compact JSON into an indented, colour-highlighted document and gives you a collapsible tree view for navigating deeply nested structures. It is aimed at reading and exploring JSON rather than editing it.

Beautifying is the same operation as formatting: whitespace is reintroduced so the hierarchy of a document becomes visible. What distinguishes a beautifier is the emphasis on inspection, syntax colouring, bracket matching, and the ability to fold sections you are not currently interested in.

That matters most with large, deeply nested payloads. A response with several levels of arrays inside objects is hard to follow as flat indented text; collapsing the branches you do not care about narrows it to the part you do.

How to use the JSON Beautifier

1. Paste the JSON you want to inspect. Any valid JSON document works, from a small config object to a large nested API response.
2. Click Beautify. The document is re-indented and syntax-highlighted in the output pane.
3. Collapse and expand nodes. Use the fold controls in the gutter to hide branches, which is the fastest way to get an overview of a large document's top-level shape.
4. Adjust the indent if needed. Wider indents make shallow documents clearer; narrower indents keep deeply nested documents from running off the right edge.

Worked examples

{"user":{"id":7,"profile":{"name":"Radia Perlman","links":{"site":"example.com","docs":"example.com/docs"}}}}

{
  "user": {
    "id": 7,
    "profile": {
      "name": "Radia Perlman",
      "links": {
        "site": "example.com",
        "docs": "example.com/docs"
      }
    }
  }
}

Common use cases

• Exploring an unfamiliar API. When you do not yet know a response's shape, collapsing to the top level and expanding selectively is faster than scrolling through indented text.
• Reading webhook payloads. Webhook bodies are often large and mostly irrelevant to the field you care about. Folding lets you ignore the rest.
• Explaining data structures. A beautified, highlighted document is easier to screenshot and share when documenting a format for teammates.
• Spot-checking exports. Before importing a data dump, expanding a few records confirms the fields are populated as expected.

Features and limitations

• Syntax highlighting distinguishes keys, strings, numbers, booleans, and null.
• Collapsible tree view for navigating nested objects and arrays.
• Configurable indent width.
• Handles large documents, though very large files may render slowly because highlighting applies to the whole document.
• Read-oriented: it is not a schema-aware editor and will not suggest or complete fields.

Frequently asked questions