JSON Viewer
Browse JSON in an interactive tree view.
Raw JSON strings are hard to scan when objects nest several levels deep. Utilitoo's JSON Viewer parses your input and renders a collapsible tree so you can expand only the branches you care about - perfect for debugging API payloads, inspecting config exports, and reviewing webhook bodies.
Developers use tree viewers when a flat formatted dump still feels overwhelming, when comparing field names across large responses, or when teaching teammates how a document is structured. QA engineers validating fixture files also benefit from quick visual navigation without installing desktop tools.
Paste JSON and the tree appears instantly with color-coded types: strings, numbers, booleans, and null. Click arrows to expand or collapse nodes. Pair with JSON Formatter for readable text output or JSON Schema Validator when you need contract checking.
All parsing runs locally in your browser on Utilitoo. Your data is never uploaded or stored. Free and private for developers, analysts, and anyone exploring structured JSON.
JSON Viewer is built for the inspect-edit-copy loop developers repeat dozens of times per day. Because Utilitoo runs in the browser, you avoid context switching to desktop utilities while reviewing logs, configs, or API responses. When output feeds into production systems, validate on a staging copy first.
Common use cases
- Browse JSON in an interactive tree view - a common daily workflow on Utilitoo.
- Preparing json viewer results to paste into pull requests, tickets, or team chat.
- Validating json viewer data from a third-party API before wiring it into your application.
- Teaching or documenting json viewer workflows without installing desktop software.
- Cross-checking JSON Viewer output against a colleague's result during pair debugging or code review.
Tips & common mistakes
JSON Viewer runs entirely in your browser on Utilitoo, so you can paste sensitive API payloads, configs, or logs without uploading them. Start with a small sample to confirm the output format, then process the full input. If results look wrong, check for trailing commas, wrong encoding, or mixed line endings - common issues when copying from terminals or log viewers. Pair with JSON Validator before formatting broken payloads, and use JSON Minifier when you need compact output for production. Keep JSON Viewer in a pinned tab during active development - it is faster than CLI one-offs for quick transforms. Use the Related Tools section to chain utilities without returning to the homepage.
Common errors
- Unexpected token or invalid JSON - often caused by trailing commas, single quotes, or unescaped characters in strings.
- Empty or partial paste - ensure you copied the full payload, including opening and closing braces or brackets.
- Wrong encoding - UTF-8 BOM or smart quotes from word processors can break parsers; paste from a plain-text editor if validation fails.
How to use
- Paste JSON into the input box.
- Expand and collapse nodes in the tree view.
- Use Clear to reset the input.
Frequently Asked Questions
How do I view JSON as a tree online?▼
Paste JSON into Utilitoo and the interactive tree renders automatically with expandable nodes.
Does the viewer modify my JSON?▼
No. It only parses and displays your data. Values remain unchanged.
Can I view arrays of objects?▼
Yes. Arrays and nested objects are fully supported with indexed and keyed nodes.
Is it safe for API responses with secrets?▼
Yes. Parsing happens locally in your browser. Nothing is sent to a server.
What if my JSON is invalid?▼
Utilitoo shows a syntax error message. Use JSON Validator first to locate the problem.
Related Tools
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