UtilityKit
AvailableBrowser-OnlyInternal DataText

JSON Tools

Format, validate, view in a collapsible interactive tree, and visually edit JSON with draft safety.

Input Raw JSON
Formatted JSON

About JSON Tools

Clean up raw JSON payloads, fix indentation, validate syntax with exact error pointers, explore deep nested data in a collapsible tree viewer, and visually edit keys, values, and arrays inline without server uploads.

Accepted Input:Raw JSON string or file up to 500,000 characters
Output Result:Beautified (2 or 4 spaces), minified, or visually edited valid JSON
Processing model:Runs 100% in your browser. API responses, keys, and JSON payloads never leave your computer.

How It Works

1Step 1

Format & Validate: Paste or upload raw JSON to pretty-print (2/4 spaces), minify, and locate syntax errors with exact line and column pointers.

2Step 2

Tree View: Inspect valid JSON in an accessible, collapsible tree view with type badges, node search, and primitive root support.

3Step 3

Visual Edit: Edit keys and values inline, add or delete properties and array items, validate draft edits, and save changes to your JSON document.

Common Use Cases

Formatting raw API responses, webhooks, and JSON logs for readability.
Navigating and inspecting deeply nested objects and arrays in a collapsible tree viewer.
Visually modifying configuration files (tsconfig, package.json, settings) with draft validation before saving.
Minifying JSON payloads to reduce bandwidth and storage size.

Frequently Asked Questions

Quick answers to common questions for users and search assistants

Does my JSON payload get sent to an external server?
No. All parsing, tree viewing, and visual editing occur locally inside your web browser.

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