Can I minify JSON as well as format it?

Yes, you can toggle between a pretty-printed, indented view and a fully minified single-line output.

Is my JSON data uploaded to a server when I use this tool?

No, all parsing, validation, and formatting happen locally in your browser, which matters for sensitive API keys or payloads.

Can I sort JSON object keys alphabetically?

Yes, there's a one-click option to sort all object keys alphabetically for easier comparison and readability.

100% Client-Side PrivateTree & DiffCategory: Developer Tools

JSON Formatter, Validator & Prettifier

Format, validate, minify, and explore JSON with a collapsible tree view and exact error locations — free, private, and built for developers.

JSON Swiss-Army Studio

100% Client-Side Validator, Prettifier & Tree Inspector

Indent:

Valid JSON Syntax

13 Total Keys•0.4 KB

BLUF (Bottom Line Up Front) Summary

This developer tool formats, validates, and minifies JSON entirely in your browser, pinpointing syntax errors down to the exact line and column. An interactive collapsible tree view and alphabetical key sorting make it easy to inspect large API responses without uploading sensitive payloads anywhere.

How to Format & Validate JSON

Paste or Upload Your JSON

Paste raw JSON strings into the input editor or load an existing .json file from your system.

Auto-Format with 2/4 Space or Tabs

Click Beautify for clean hierarchical indentation or Minify to compact your payload for production.

Fix Errors Using Exact Line & Column

Instantly identify broken commas, unescaped quotes, and missing brackets with exact line/column indicators.

Why Developers Use This JSON Tool

Interactive Collapsible Tree View

Inspect complex nested structures with expandable nodes, array counts, and syntax highlighting.

Alphabetical Key Sorting

Sort all keys A-to-Z with one click for consistent payload comparison and clean git diffs.

100% Private, No Server Uploads

API tokens, authorization headers, and confidential customer payloads never leave your local device memory.

Best Use Cases

Use Case 01

Debugging API Responses

Use Case 02

Cleaning Up Config Files

Use Case 03

Minifying JSON for Production

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Frequently Asked Questions

Yes, it pinpoints the exact line and column of the parsing error so you can fix malformed JSON quickly.