What is JSON Viewer Tool?
JSON Viewer Tool is a free online utility that helps developers and
non-technical users work with JSON data. You can quickly
beautify JSON, explore it in a collapsible
tree viewer, or edit it in a code editor.
Key features
- Side-by-side JSON viewer with left and right panels
- Tree, code and text modes for both panels
- One-click JSON formatter / beautifier (left → right)
- Minify JSON and copy/transfer between panels
- Validate JSON and download results
- Runs entirely in your browser — no server, no data logging
Use this tool as a JSON viewer,
JSON formatter, JSON editor and
JSON validator all in one place.
FAQ: Online JSON Viewer
Is my JSON uploaded or stored?
No. All parsing and formatting is done locally in your browser using
JavaScript. We do not upload or store your JSON on any server.
How do I use the side-by-side JSON viewer?
Paste your JSON into the left editor, then click
Format JSON → Right to beautify it into the right panel.
You can compare, edit, and copy data between both sides.
Can I choose different modes for each side?
Yes. You can use tree mode on one side and
code mode on the other to compare structure and raw text.
What browsers are supported?
JSONViewerTool.com works in all modern browsers, including Chrome,
Edge, Firefox and Safari.