Private JSON Formatter for Validation, Beautifying, Minifying, and Viewing
Use this private JSON formatter and JSON viewer to format, validate, minify, beautify, and edit JSON without uploading private API payloads or structured data.
It is useful for API payloads, test data, repeatable arrays, and quick browser-local inspection when you need a JSON formatter no upload workflow.
Private by design: pasted JSON and selected files are processed locally in your browser. They are not uploaded to a USA Data Tools formatter server.
Why use it?
Readable JSON makes it easier to inspect API responses, compare payloads, and clean up structured data without sending private values to a remote formatter. The local workflow keeps formatting, validation, minifying, beautifying, and viewing work on your device. For mapping checks, use Cross-Format File Compare for JSON to XML or JSON to JSON.
Need a quick browser guide? Try the JSON formatter online guide or the JSON beautifier guide.
What this is good for
Use this JSON formatter to clean API payloads, review sample data, and prepare a readable file before compare or export.
Before: {"poNumber":"123456","qty":10}
After: {
"poNumber": "123456",
"qty": 10
}
JSON Formatter FAQ
Can I format JSON without uploading it?
Yes. JSON formatting, validation, editing, copy, and download actions run locally in the browser.
Can I use it for API payloads?
Yes. It is designed for API responses, request bodies, test data, and structured JSON files used by developers and QA teams.
Is this a JSON beautifier and minifier?
Yes. You can beautify readable JSON or minify compact JSON in a browser-local workflow.
Can I use it as a JSON viewer online?
Yes. It works as a browser-local JSON viewer so you can inspect structured payloads without sending them to a remote site.