/tools/json-viewer
Online JSON
Viewer.
Validate, format, minify, search, and inspect JSON in a collapsible tree. Your data is processed locally and never uploaded.
JSON input
Result
/usage
How to view and format JSON online
- Paste JSON into the input, drag a JSON file onto it, or choose a file from your device.
- Select View tree to validate the document and browse nested objects and arrays.
- Search keys or values, copy individual nodes and JSON Pointer paths, or switch to formatted text.
- Copy the output, minify it, or download a clean JSON file.
/capabilities
JSON formatter, validator, and tree viewer
Useful errors
Invalid JSON remains in the editor and, where the browser exposes it, the error includes the line and column that needs attention.
Responsive on large files
Parsing happens away from the interface. Tree branches load only when opened, and bulk expansion is capped at 2,000 nodes.
/faq
JSON Viewer questions
Is my JSON uploaded or stored?
No. JSON input is processed in a dedicated worker inside your browser. It is not uploaded, saved to browser storage, or included in analytics events.
What is the maximum JSON file size?
The first release accepts up to 10 MB per JSON document. Large trees remain lazy so opening one branch does not render every node.
Can this repair invalid JSON?
No. The viewer reports invalid JSON but does not guess at repairs, which avoids silently changing your data.