JSON Viewer & Tree Explorer
Explore JSON with an interactive collapsible tree view.
- 100% client-side · your data never leaves your browser
- Instant, no rate limits
- Free, no sign-up
Overview
JSON Viewer — Online Tree Explorer & Beautifier
Explore JSON as an interactive collapsible tree instead of a wall of text. Expand and collapse branches, scan nested objects, count array lengths, and spot null versus missing fields at a glance — ideal for debugging API responses, log events, and large config files. The viewer pairs a syntax-highlighted editor with a structured tree, all running privately in your browser.
Tree view vs raw JSON
Plain text hides structure: a 2,000-line payload looks the same whether it is two levels deep or twelve. A tree view surfaces hierarchy immediately — you can collapse the parts you do not care about and drill into the branch you do. Array lengths and object key counts become visible without scrolling.
Use the viewer after formatting or validating JSON from logs and APIs. It is the fastest way to answer questions like 'is this field an empty array or null?' or 'how many items came back?' without parsing the text by eye.
What you can do
- Collapse and expand any object or array branch
- Read array lengths and nesting depth at a glance
- Distinguish null, empty string, empty array, and missing keys
- Beautify the raw JSON alongside the tree for copy-paste
- Inspect large API and webhook responses without an IDE
Viewer, editor, and analyzer
The viewer is read-focused: it helps you understand a payload quickly. When you need to change values, switch to the JSON Editor for syntax-aware editing. When you want quantitative stats — total keys, maximum depth, type distribution — the JSON Analyzer summarizes the whole document. All three tools share the same private, client-side engine.
FAQ
Frequently asked questions
Does the tree work on invalid JSON?
The tree requires syntactically valid JSON. If your input has errors, run it through the JSON Validator or JSON Repair tool first, then explore the fixed result.
How large a file can it handle?
The viewer handles typical API responses and config files smoothly. Very large documents (tens of megabytes) may render slowly because the entire tree is built in the browser.
Can I edit values in the viewer?
The viewer is optimized for reading and navigation. For editing, use the JSON Editor, which offers syntax highlighting, formatting, and inline validation.
Is my JSON uploaded?
No. Parsing and rendering happen entirely on your device. Nothing is sent to a server.
Continue with a related tool
All tools- JSON Editor
Write, edit, format, minify, and validate JSON in a fast full-screen or embedded editor.
- JSON Analyzer & Parser
Analyze JSON structure — depth, key counts, types, and top-level fields at a glance.
- JSON Formatter & Beautifier
Format, prettify, and beautify messy JSON with configurable indentation and key sorting.
- JSON Minifier
Compress JSON by removing whitespace to shrink payloads and speed up transfers.
- JSON Path Extractor
Query JSON with dot paths and bracket indices — extract values at any key path.
- JSON Escape & Unescape
Escape or unescape strings for code, logs, and API payloads.