JSON Viewer
Paste JSON and explore it as a collapsible, colour-coded tree.
How to use the JSON Viewer
- Paste or type your JSON on the left.
- Click any object or array to collapse or expand it.
- Use expand all or collapse all to move through large documents.
About the JSON Viewer
The JSON Viewer turns a wall of raw JSON into a collapsible, colour-coded tree you can actually read. Paste your data on the left and it renders as a structured outline where objects, arrays, strings, numbers, booleans and nulls each get their own colour, so the shape of the document is obvious at a glance.
Click any object or array node to collapse or expand it, and use the expand all and collapse all controls to move through large or deeply nested documents without endless scrolling. This makes it easy to drill into one branch of an API response while hiding everything else. The viewer is read-only by design: it is built for exploring and understanding a payload, not changing it.
Everything happens entirely in your browser. Your JSON is never uploaded to a server, which makes it safe for API keys, tokens and other sensitive responses. If you need to reshape or clean the data, open the JSON Editor, and to confirm a payload parses before viewing it, try the JSON Validator.
Frequently asked questions
Does the JSON Viewer let me edit the data?
No. It is a read-only explorer built for understanding a payload. It renders your JSON as a collapsible, colour-coded tree so you can navigate it, but it does not change the data. To reformat, minify or sort keys, use the JSON Editor instead.
Is my JSON uploaded anywhere?
No. All parsing and rendering happen entirely in your browser. Nothing is sent to a server, so it is safe to paste responses that contain API keys, tokens or personal data.
Can it handle large or deeply nested JSON?
Yes. You can collapse branches you do not care about and use expand all or collapse all to move through big documents. Very large files depend on your browser and device memory, since the whole tree is built in the page.
What do the colours mean?
Each JSON type is shown in a distinct colour, so strings, numbers, booleans, null values, objects and arrays are easy to tell apart at a glance. This makes the structure of the document clear without reading every character.
What happens if I paste invalid JSON?
The tree can only render valid JSON. If your text does not parse, check it first with the JSON Validator, which reports the exact error along with the line and column so you can fix the problem spot.