Raw JSON Input
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PrettyJSON
Instantly clean, validate, and inspect web payloads
Sample Payloads
RFC 8259 Compliant & 100% Client-Side
Online JSON Tree Viewer & Inspector
Inspect complex nested API responses with an interactive, collapsible JSON tree view. Search nodes, inspect data types, and navigate deep objects effortlessly.
Explore Specialized JSON Tools
JSON Formatter
Format & beautify raw JSON with 2-space or 4-space indentation.
JSON Minifier
Compress JSON payloads onto 1 line & calculate bandwidth savings.
JSON Validator
Real-time RFC 8259 syntax checker with exact line & column error pinpointing.
JSON Tree Viewer
Inspect nested API responses with interactive node expansion & key search.
JSON Repair
Auto-FixAuto-fix single quotes, trailing commas, unquoted keys, and JS comments.
100% Private & Offline Ready
No backend requests. Your sensitive payloads remain strictly on your local device.
Zero Network Latency
Instantaneous formatting, minification, repair, and tree view rendering with zero server roundtrips.
Exact Error Line Pinpointing
Detect unescaped quotes, trailing commas, and structural syntax errors with exact line & column markers.
PrettyJSON vs. Traditional Online JSON Editors
See how PrettyJSON outperforms older web formatters in privacy, performance, and developer utility.
| Feature | PrettyJSON.in | Traditional Editors |
|---|---|---|
| Privacy & Security | 100% In-Browser (0 Server Logs) | Often Uploads to Server |
| Speed & Performance | Instant Local JS / Web Processing | Network Request Latency |
| View Modes | Interactive Text & Tree View | Text Only |
| JSON Auto-Repair | Built-in Auto-Fix Engine | Manual Editing Only |
| Error Handling | Exact Line & Column Highlighting | Generic Error Messages |
Programmatic JSON Pretty Printing Examples
How to format and beautify JSON programmatically across languages and command line tools.
JavaScript (Browser / Node.js)
const data = { name: "PrettyJSON", rating: 5, active: true };
// Pretty print with 2-space indentation
const formatted = JSON.stringify(data, null, 2);
console.log(formatted); Python
import json
data = {"name": "PrettyJSON", "rating": 5, "active": True}
# Pretty print with 2-space indentation
formatted = json.dumps(data, indent=2)
print(formatted) cURL & jq (Command Line)
# Fetch API response and beautify instantly with jq
curl -s https://api.example.com/data | jq '.'
# Compact / Minify JSON output
curl -s https://api.example.com/data | jq -c '.'Frequently Asked Questions
Common questions and expert answers regarding this tool.
What is an interactive JSON Tree Viewer?
A JSON Tree Viewer parses JSON into a visual tree hierarchy with collapsible nodes, color-coded data types, key-value search, and array element indexing for effortless exploration of huge API responses.
How do I search keys and values inside a JSON tree?
Use the top-right search input in the Tree View panel. It instantly filters and highlights matching object keys, nested properties, and string/number values across all tree branches.
Why is Tree View better than Text View for large API payloads?
Large API responses (1,000+ lines) are overwhelming in plain text. Tree View allows you to expand and collapse specific object branches, collapse array collections, and isolate key data in seconds.