Free JSON Viewer Online
Paste JSON or load a file. Use Viewer for a collapsible tree and Text for raw JSON. Click a node to inspect its properties. Search with GO, Next, and Previous. Nothing is uploaded to the server.
| Name | Value |
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Ready. JSON is not saved on the server.
About JSON Viewer
This free online JSON viewer parses any JSON document and renders it as a collapsible tree so you can inspect nested objects, arrays, keys, and values at a glance. Paste raw JSON, load a .json file, or switch to the text tab to edit the source. Beautify with 2, 3, or 4 space indent, minify for production, expand or collapse every branch, and filter the tree as you type. Copy formatted output in one click when you are ready to paste it back into code.
Compared with jsonviewer.stack.hu and a plain JSON formatter, this tool pairs a readable tree with edit, beautify, minify, expand or collapse, and search in one private page. You do not need a separate formatter tab or a third-party host that may upload your payload. Developers use it to explore API responses, debug configuration files, review package manifests, and check structure before shipping a change. It is useful when a payload is too nested to read in a text editor, when you need to confirm a key exists, or when you want a quick sanity check that the document is valid JSON.
The viewer highlights the shape of objects and arrays so large documents stay scannable. Search inside the tree to jump to a field name or value, then collapse deep branches you do not need. If the input is invalid, you get a clear parse error instead of a silent blank page. An example document is one click away when you want to try the interface first.
Parsing happens locally in your browser, so sensitive payloads, customer records, and internal configs never leave your device. There is no upload, no account, and no server log of what you pasted. Use this free JSON tree viewer whenever you need to inspect, format, or browse JSON online with privacy.
Features
- Inspect, format, and browse JSON
- Paste text or load a file and get a result in one click
- Copy or download the output for your project
- Input for JSON Viewer is processed in your browser
- No signup and no intentional server-side storage of tool input
How to use JSON Viewer
- Paste text or load a file into JSON Viewer.
- Choose the format, compare, validate, or convert action you need.
- Copy the result or download it for your project.
- Input is processed in your browser and is not uploaded for this tool.
Suggested next steps
- JSON Beautify — Pretty-print JSON with 2, 3, or 4 space indent
- JSON Path Tester — Query JSON with JSONPath expressions
- JSON Schema Validator — Validate JSON data against a JSON Schema
Frequently asked questions
Is JSON Viewer free?
Yes. JSON Viewer on Free Tool Mate is free to use in your browser. There is no paid unlock for the core tool features described on this page.
Does JSON Viewer upload my data?
No. JSON Viewer is designed to process your input locally in the browser. Free Tool Mate does not intentionally store tool input or uploaded files on the server.
Do I need an account to use JSON Viewer?
No account is required. Open the page, use JSON Viewer, and leave when you are done.
What can I use JSON Viewer for?
JSON Viewer covers Inspect, format, and browse JSON. It is built for quick, private work in the browser without installing desktop software.