View JSON in tree, code
or table — instantly

Everything you need to explore JSON visually

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Related JSON tools

Common questions answered

What is a JSON viewer?

A JSON viewer renders raw JSON data as an interactive, navigable tree structure. Instead of reading hundreds of lines of text, you expand and collapse branches, search for keys, and click nodes to copy their path. Viewers are essential when exploring unfamiliar API responses, database exports, or undocumented configuration files.

This viewer uses a lazy rendering engine that builds tree nodes on demand rather than rendering the entire document at once. This means it handles JSON files with thousands of nodes without freezing your browser. Each node shows its type, child count, and JSONPath. Click any node to copy its full path to the clipboard.

{"company":{"name":"Acme",
 "departments":[{"name":"Eng",
  "employees":42},{"name":"Sales",
  "employees":28}]}}

▾ company {2}
  name: "Acme"
  ▾ departments [2]
    ▾ 0 {2}
      name: "Eng"
      employees: 42
    ▸ 1 {2} ...

Get the most out of this tool

• Collapse all nodes first, then expand only the branches you need — the fastest way to explore large files.
• Use the search function (Cmd+F) to find specific keys or values within the tree without manual navigation.
• Click any node path to copy the JSONPath that selects it — useful for writing queries and API mappings.

What makes a good JSON viewer

A JSON viewer is a tool that renders JSON data in a structured, interactive format that goes beyond simple pretty-printing. Where a formatter adds indentation to make text readable, a viewer creates a navigable interface: collapsible nodes, syntax highlighting, clickable paths, search functionality, and multiple rendering modes. The goal is to make large, deeply nested JSON structures explorable without requiring the user to read every line sequentially.

The tree view is the most popular JSON viewing mode. It renders JSON as an interactive tree where each object and array is a collapsible node. Clicking a node collapses its children, showing just the key and the type (Object, Array with count). This lets users navigate a JSON document with hundreds of keys at the top level and thousands more nested underneath, by expanding only the branches they care about. Lazy rendering ensures performance — only visible nodes are added to the DOM.

The table view is ideal for JSON arrays of objects — the most common data structure returned by list API endpoints. When you have an array of 50 user records each with 10 fields, the table view renders it as a spreadsheet-like grid where each row is a record and each column is a field. This lets you compare values across records at a glance, something the tree view makes difficult. Sorting, filtering, and scanning become much faster in table mode.

The graph view is a visual representation of the JSON hierarchy as an interactive network diagram. Nodes represent objects and arrays; edges represent parent-child relationships. Users can pan and zoom the canvas to navigate large graphs, and can collapse entire subtrees to reduce visual complexity. The graph view is particularly useful for understanding the structure of a deeply nested JSON document at a high level before drilling into specific branches in the tree view.

JSONPath integration adds query capability to the viewer. Instead of visually hunting for a field, you type a JSONPath expression ($.users[?(@.active==true)].email) and the viewer highlights all matching nodes. This is especially powerful for arrays — filtering an array of thousands of elements to only show the records matching a condition. The viewer supports standard JSONPath syntax including filters, wildcards, and recursive descent.

Performance is the most critical requirement for a JSON viewer, because users frequently paste large production data. A naive approach that calls JSON.parse() and builds a full DOM for every node blocks the browser for seconds with megabyte-scale JSON. This tool offloads parsing to a Web Worker for files over 100KB, keeping the main thread responsive. The tree view uses virtual rendering — only nodes currently visible in the viewport are in the DOM — enabling smooth scrolling through arbitrarily large JSON documents.

When developers use this tool

Additional frequently asked questions