JSON Viewer — Interactive Tree Online
Free online JSON viewer — browse any JSON as a collapsible tree. Click to expand or collapse nodes, navigate deep structures, copy individual paths.
Click View Tree to render…
Browse any JSON as a collapsible tree — click to expand or collapse nodes, scan colour-coded values, drill into deeply-nested structures without losing your place. Useful when reading 1000-line API responses or debugging gnarly configs.
Need to edit / format the JSON? JSON Formatter has Format, Validate, Repair. Want raw stats? JSON Stats gives you depth, key count, type breakdown.
How to View JSON as a Tree
Paste your JSON
Drop the document into the editor on the left.
Click View Tree
PDFFlare parses the JSON and renders it as a collapsible tree on the right.
Expand and explore
Click any node to expand or collapse it. Use Expand all / Collapse all to control everything at once.
When Do You Need a JSON Viewer?
Reading API responses: A real production payload is hundreds of lines deep. The tree gets you to the field you need without scrolling.
Reviewing configs: Nested config files (Webpack, ESLint, ESLint flat config) are easier to verify when you can collapse sections you don't care about.
Teaching JSON: Show a beginner exactly how their JSON nests. The colour-coded leaves make types obvious.
Quick eyeballing: You don't need precision — you just want to know what shape the data is. Tree view is the fastest way to find out.
Why Use PDFFlare for JSON Viewing?
Click-to-Toggle
Every container is a button. One click to expand or collapse — no menu, no chord.
Colour-Coded Types
Strings, numbers, booleans, null — each gets its own colour so type bugs jump out.
100% Browser-Based
Your data stays on your device — safe for production payloads.
No Signup Required
Open, paste, view. Zero friction.
Frequently Asked Questions About JSON Viewer
Large JSON documents are painful to read as text — line wrapping, scrolling, indentation drift. A collapsible tree lets you see the structure at a glance and drill into the parts you care about.
The tree renders entirely in your browser, so the practical ceiling is your device's memory. Tens of thousands of nodes are fine on a modern laptop. For really huge documents, expand selectively rather than using Expand all.
Strings are green, numbers amber, booleans cyan, null grey, objects blue, arrays purple. Quick visual scanning catches type bugs ('this should be a number, why is it a string?').
Yes — select text in the tree as you would normally, or use the JSONPath Tester to extract a specific path programmatically.
View only. For editing, use the JSON Formatter (which has Format, Validate, Repair, Sort Keys actions). The Viewer is read-only by design — fewer surprises.
No. Everything renders in your browser.
The tree won't render and the error message tells you which line broke. Open the JSON Formatter to find and fix the issue.
Not yet — the URL doesn't carry your data. Copy the source text and they can paste it into the same tool to see the same tree.
Yes. Use the search box above the tree to find any matching key or value (case-insensitive). The viewer highlights every match and auto-expands its ancestors so you see the matches in context. The badge next to the search shows the total match count.