JSON Viewer Online
Paste or upload JSON and explore it as an interactive, collapsible tree — expand, collapse, and search, entirely in your browser.
Paste your JSON
Never uploaded
Rendering happens entirely in your browser — your JSON never touches our servers.
Collapsible tree
Expand or collapse any object or array, or everything at once, to navigate large JSON quickly.
Free, no limit
No account, and no limit on how many times you can use it.
What is a JSON Viewer?
A JSON viewer displays JSON as an interactive, collapsible tree instead of raw text — useful for exploring a large or deeply nested JSON structure (an API response, a config file, an export) without scrolling through hundreds of unformatted lines. Collapse the parts you don't need, expand the parts you do, and search to jump straight to a specific key or value.
How to View JSON Online
- Paste or upload your JSON. Paste directly into the editor, or click "Upload a file" to load a .json file's contents.
- Click "View Tree." Your JSON renders as a collapsible tree below.
- Explore. Click any object or array to collapse or expand it, use Expand All / Collapse All, or search to highlight matching keys and values.
- Copy or download. Copy the original JSON to your clipboard, or download it as a .json file.
Why Use CurePDF's JSON Viewer
Most JSON viewers send your data to a server to render it. This one doesn't — the tree is built entirely by your browser's own JavaScript, so nothing you paste or upload ever leaves your device. That also makes it fast, with no file-size limit tied to a server request and no account needed.
Frequently Asked Questions
What is a JSON viewer?
A tool that displays JSON as an interactive, collapsible tree instead of raw text — useful for exploring a large or deeply nested JSON structure without scrolling through hundreds of unformatted lines.
Can I collapse and expand parts of the JSON?
Yes — click any object or array's arrow to collapse or expand it, or use the Expand All / Collapse All buttons to do it everywhere at once.
Can I search inside my JSON?
Yes. Type into the search box to highlight matching keys and values — matches outside a collapsed section automatically expand their parent so you can see them.
Is my JSON data uploaded anywhere?
No. This tool runs entirely in your browser — your data is never sent to CurePDF's servers.
Is the JSON viewer free?
Yes, with no account required and no limit on how many times you can use it.
Does it work on mobile?
Yes, it works the same in a mobile browser as on desktop.
What's the difference between the JSON Viewer and the JSON Formatter?
The Formatter reformats JSON as text (indented, minified, or validated) for copying or downloading. The Viewer displays it as an explorable tree instead — use the Formatter to clean up JSON, and the Viewer to explore a large one.
Can I copy or download from the viewer?
Yes — Copy sends the original JSON to your clipboard, and Download saves it as a .json file.