Online JSON Inspector and Validator

jsonview.dev is a browser-based JSON viewer, JSON formatter, JSON validator, JSON diff, and JSON converter for JSON to CSV, YAML, and XML workflows. Inspect, pretty print, minify, search, and compare JSON locally with a fast developer-friendly workspace.

What You Can Do with jsonview.dev

Inspect nested JSON with a linked editor and Miller columns workflow.
Format, validate, and minify JSON with inline error feedback.
Convert JSON into YAML, XML, CSV, or Base64-friendly output.
Compare two JSON documents side by side with diff navigation and review controls.
Work through complex JSON data in a clean, focused developer workspace.

How to Use the JSON Viewer

Paste JSON or drag and drop a .json file into one of the workspaces.
Choose the right tool to inspect, format, convert, or compare the document.
Review the output, navigate structure, and export the result you need.

FAQ

What is jsonview.dev useful for?

jsonview.dev is useful for inspecting, formatting, validating, converting, and comparing JSON with a workflow designed for debugging, review, and day-to-day development.

Does jsonview.dev support large JSON files?

Yes. jsonview.dev includes a large-file mode that keeps the editor responsive and switches to a text-first workflow when full structure features would be too heavy.

What makes Miller columns useful in a JSON inspector?

Miller columns let you move through nested objects and arrays one level at a time, so deep JSON stays readable without losing context.

Can I search JSON by key or path?

Yes. JSON search helps you jump to matching keys, paths, and values, then syncs the result back into the editor and Miller view.

Can I format, convert, and diff JSON in the same app?

Yes. jsonview.dev includes dedicated formatter, converter, and diff workspaces so you can move between tasks without leaving the toolset.

JSON InspectorReady

JSON Inspector and Viewer

The inspector workspace is built for reading and navigating nested payloads. It combines a code editor, linked path selection, Miller columns, and search so you can move through deep JSON structures without losing context.

Inspector Features

Inspect nested objects and arrays with linked editor selection and Miller columns.
Search JSON by key, path, and value, then jump directly to matching structure.
Keep large payloads manageable with a large-file aware inspection workflow.
Follow structural context while editing and browsing the same document.

When to Use the Inspector

Review API responses with deeply nested data.
Explore configuration files and event payloads.
Trace values through complex object paths during debugging.
Open large JSON documents when a plain text viewer is not enough.

Inspector FAQ

What makes this JSON inspector different from a plain JSON viewer?

The inspector combines raw text editing, linked structural navigation, search, and Miller columns, so you can inspect both syntax and hierarchy in one workspace.

Can I inspect large JSON files here?

Yes. The inspector includes a large-file aware mode that keeps the experience responsive when full structure rendering would be too heavy.