What does the JSON Formatter and Validator do?

It formats, minifies, validates, copies, downloads, and displays JSON in a collapsible tree view with syntax highlighting and clear validation feedback.

Can I upload a JSON file?

Yes. You can upload a .json file, format it, validate it, inspect the structure, copy the result, or download the cleaned JSON file.

Yes. The tool includes one-click minify and beautify controls so you can switch between compact JSON and readable formatted JSON.

Does the tool show JSON errors?

Yes. Invalid JSON produces a clear error message and highlights the likely problem line in the editor.

Private, local, JSON tooling

Format, validate, inspect JSON in seconds.

Paste JSON, upload a .json file, beautify, minify, validate, copy, download, and explore nested data through a collapsible tree view.

Autoformat & detect

Lineerror highlighting

Darkcode-first UI

JSON Editor Paste, upload, validate, beautify, minify, copy, or download.

Drag & drop a .json file or paste directly below. Auto-format runs after valid JSON is detected.

{ }

Ready for JSON

Paste or upload JSON to validate and inspect it instantly.

Lines1

Size0 B

Top Type—

Keys / Items—

Collapsible Tree View Expand arrays and objects to inspect structure.

Valid JSON will appear here as an interactive tree.

JSON Quality Tips Fast reminders for clean data handoffs.

Keys and strings must use double quotes, not single quotes.

No trailing commas after the final object property or array item.

Use beautify before reviewing diffs, API payloads, or configuration files.

Use minify before embedding JSON into compact payloads or docs.