Is my API response data sent to any server?

No. 100% of the parsing, validation, formatting, and conversion runs locally in your browser web engine using JavaScript. Confidential API tokens, user emails, and database records never leave your machine.

How does the JSONPath inspector work?

When you switch to the Interactive Tree tab and click on any key or value, the tool automatically constructs the exact normalized JSONPath (for example, $.data.items[0].id ) and places it in the inspector bar ready to copy.

Can this tool detect HTTP error responses?

Yes. The validator inspects the JSON payload for common status fields (such as status , statusCode , code , error , or RFC 7807 title / detail ) and highlights the corresponding HTTP status pill (e.g. 200 OK, 422 Unprocessable, 500 Error).

Can I convert API responses into TypeScript interfaces?

Yes. In the Advanced Transform Hub below the workspace, select TypeScript to automatically generate deduplicated TypeScript interface definitions inferred from your live JSON payload.

What is the maximum payload size supported?

Because the tool runs entirely on your device, it can easily handle multi-megabyte JSON responses. For very large payloads (> 5MB), minification and tree expansion are optimized to prevent browser freezing.

API Response Formatter

Format, validate, inspect, search, and transform JSON API responses with interactive tree view and JSONPath.

TL;DR: API Response Formatter is a free, browser-based tool that lets you format, validate, inspect, search, and transform JSON API responses with interactive tree view and JSONPath.

0 characters | 0 lines | 0 KB 100% Client-Side Private

Paste or load JSON to format & inspect API structure. Ready

JSONPath: $

{
  "status": "ready",
  "message": "Paste API response to format"
}

Response Metrics & Topology

0 B

Size

0 B

Est. Gzip

Lines

Total Keys

Objects

Arrays

Max Depth

Strings

Numbers

Booleans

Nulls

Transform API Response

Instant Client-Side Conversion

About the API Response Formatter

API Response Formatter formats and colors raw REST, GraphQL, and Webhook response bodies (JSON, XML, HTML, plain text) with status code indicators, response header parsing, and syntax highlighting.

How to Use the API Response Formatter

Paste your raw API response string or webhook payload.
Select response format (Auto-Detect, JSON, XML, or Text).
Click 'Format Response' to beautify structure and highlight syntax.
Copy formatted response or save as a mock fixture file.

Expert Tips for API Response Formatter

Mock API Fixtures: Create clean, beautified JSON mock fixtures for unit tests and frontend component development.
Debug Webhooks: Format messy single-line Stripe, GitHub, or Shopify webhook payloads in one click.
Format Headers & Body: Cleanly separates HTTP response headers from the payload body.

Related Guides & Tutorials

Json Formatting For Developers — Learn in-depth concepts, best practices, and expert tips.
Base64 Encoding Explained — Learn in-depth concepts, best practices, and expert tips.

100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Frequently Asked Questions

: No. 100% of the parsing, validation, formatting, and conversion runs locally in your browser web engine using JavaScript. Confidential API tokens, user emails, and database records never leave your machine.
: When you switch to the Interactive Tree tab and click on any key or value, the tool automatically constructs the exact normalized JSONPath (for example, $.data.items[0].id) and places it in the inspector bar ready to copy.
: Yes. The validator inspects the JSON payload for common status fields (such as status, statusCode, code, error, or RFC 7807 title/detail) and highlights the corresponding HTTP status pill (e.g. 200 OK, 422 Unprocessable, 500 Error).
: Yes. In the Advanced Transform Hub below the workspace, select TypeScript to automatically generate deduplicated TypeScript interface definitions inferred from your live JSON payload.
: Because the tool runs entirely on your device, it can easily handle multi-megabyte JSON responses. For very large payloads (> 5MB), minification and tree expansion are optimized to prevent browser freezing.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). API Response Formatter [Software]. https://nexlove.org/tools/api-response-formatter.html

“API Response Formatter.” NexLove.org, 2026, nexlove.org/tools/api-response-formatter.html.

NexLove.org (2026) API Response Formatter. Available at: https://nexlove.org/tools/api-response-formatter.html (Accessed: 2026).

@misc{nexlove_api_response_formatter,
  title = {API Response Formatter},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/api-response-formatter.html}
}

Embed This Tool

Add the live API Response Formatter tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/api-response-formatter.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="API Response Formatter — NexLove.org" loading="lazy"></iframe>

Related Developer Tools

JSON Validator

JSON Formatter

Browse all Developer Tools