JSON Viewer & Beautifier Guide

What it does

The JSON Viewer formats, validates, and displays JSON in an interactive collapsible tree. Paste API responses, configuration files, or log output to instantly see structure, spot syntax errors, and copy beautified JSON. Everything runs locally in your browser — nothing is uploaded or stored on a server.

When to use it

• Debugging API responses during frontend or mobile integration
• Validating configuration files before deployment to staging or production
• Exploring nested JSON from webhooks, error logs, or third-party services
• Sharing formatted JSON samples with teammates during code review
• Inspecting GraphQL or REST payloads without installing a desktop editor

How to use it

1. Paste JSON into the editor or upload a .json file from your project.
2. Fix any validation errors highlighted by the parser — line numbers point to the problem.
3. Expand or collapse tree nodes to navigate nested objects and arrays quickly.
4. Use the stats bar to see key counts, depth, and array lengths at a glance.
5. Copy beautified or minified output, or share a URL that encodes your current document.

Tips

• Use minify mode before pasting large payloads into Slack or email to avoid truncation.
• Collapse all nodes first, then expand only the branch you need — it keeps huge trees manageable.
• If validation fails on trailing commas, remove them — standard JSON does not allow trailing commas.
• Bookmark a share URL when collaborating on a specific API response shape with your team.

FAQ