JSON Viewer
View JSON data in a tree structure. Includes tree view, collapsible nodes, and search. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsAbout this tool
Explore nested JSON as an expandable tree instead of a flat wall of text. Collapse branches you do not need and search within large documents to find keys or values quickly.
Ideal for API responses, config files, and log extracts when you want structure at a glance without leaving the browser.
Features
- Tree view with expandable and collapsible nodes
- Search to jump to matching keys or values
- Clear separation of objects, arrays, and primitives
- Runs client-side for typical document sizes
How to use the JSON viewer
- Paste or load JSONPaste JSON text into the input area. Some viewers also accept drag-and-drop or file pickers when available.
- Navigate the treeExpand objects and arrays to drill down; collapse sections to reduce noise.
- Search and copyUse search for long payloads, then copy paths or values as needed for debugging or tickets.
Guides
- JSON Viewer: quick start in your browser Open JSON Viewer, run your task locally in the tab, and get results fast. No install: View JSON data in a tree structure.
- JSON Viewer: privacy tips and best practices Use JSON Viewer safely: what stays in the browser, what to avoid pasting, and habits that reduce mistakes.
- JSON Viewer: troubleshooting and FAQ-style fixes Common issues with JSON Viewer: empty output, slow tabs, wrong encoding. Practical checks before you give up (View JSON data in a tree structure).
- How to format JSON in your browser (no install) Paste messy JSON, prettify it, and catch syntax issues—entirely in the browser using our free formatter and validator.
- Practical use cases for JSON Viewer Where JSON Viewer fits in real tasks: View JSON data in a tree structure. Ideas for daily workflows and hand-offs.
Popular tools
Token Generator
Generate random tokens/strings for auth. Includes custom length, character set selection, and multiple token formats. Free browser tool — no signup, no install.
Developer ToolsJSON Formatter
Format and beautify JSON data. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsJWT Decoder
Decode and inspect JWT tokens. Includes header inspection and payload decoding. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsCSS Formatter
Format and beautify CSS code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsHTML Formatter
Format and beautify HTML code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsRelated tools
Token Generator
Generate random tokens/strings for auth. Includes custom length, character set selection, and multiple token formats. Free browser tool — no signup, no install.
Developer ToolsJWT Decoder
Decode and inspect JWT tokens. Includes header inspection and payload decoding. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsEncrypt & Decrypt Text
Encrypt or decrypt text with various algorithms. Includes multiple algorithms and key input. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsHTML Viewer
Preview HTML code in real-time. Includes live preview, syntax highlighting, and code input. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsHTML Formatter
Format and beautify HTML code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsLua Beautifier
Format and beautify Lua code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsFrequently Asked Questions
What is the difference between viewer and formatter?
The viewer emphasizes navigation and structure in a tree. A formatter focuses on pretty-printing text. Many workflows use both: format for readability, then tree view for exploration.
Can I view invalid JSON?
Malformed JSON may not parse. Fix syntax errors or extract the valid fragment first, then paste again.
What does the JSON Viewer tool do?
View JSON data in a tree structure. Includes tree view, collapsible nodes, and search. Runs in your browser — free, no signup, no install, no data upload. It is listed under Developer Tools on FreeEasyToolsOnline.
Is my data sent to your servers?
Most processing for this tool runs in your browser. Do not paste secrets you cannot afford to expose, and read any on-page warnings for tools that intentionally call external APIs.
Do I need to install anything?
No. Use a modern desktop or mobile browser. For best results, keep the page open until processing finishes for large files or long operations.