Open the endpoint
Visit a raw JSON response in Chrome. No separate formatter or setup step is required.
JSON API response viewer
View JSON API responses directly in Chrome
Open the response URL. Nandemo Formatter turns it into a searchable tree in place, without copy and paste or uploading the document.
Start at the response URL
Find the value
Search keys and values, then expand only the objects and arrays you need.
Use the result
Copy the document or a JSON path, switch to Raw or Minify, or convert to another supported structured format.
Work with the response in place
Searchable tree
Syntax highlighting, search, and per-node or whole-document expand and collapse keep nested responses readable.
Precise copy controls
Copy the full document, minified JSON, or the path of an individual node.
Structured conversion
Convert between JSON, JSONC, JSON5, YAML, TOML, and INI when the target format can represent the data.
No document upload
Parsing, search, copy, and conversion happen in the browser. The response body is not sent to the developer or Google Analytics.
Keep automatic formatting under your control
Match your theme
Follow the system colour scheme or keep Formatter surfaces in light or dark mode.
Show the original once
Reload the current tab once without Formatter when you need Chrome's original response view.
Disable one origin
Stop automatic formatting for an exact HTTP(S) origin without disabling the extension everywhere.
Choose analytics
Persistent-ID usage events require consent. Isolated performance outliers use a new identifier and never include the URL, domain, response body, search text, JSON path, output, or error details.
Questions
Do I need to paste the JSON into another site?
No. Open the response URL and use the formatted view on that page.
Is the API response uploaded?
No. Document processing happens in the browser, and the response body and URL are excluded from optional analytics.
Can I see the unformatted response?
Yes. Raw keeps the source inside Formatter, while Show original once reloads the current tab without Formatter for one view.
Can I stop formatting on one API origin?
Yes. Disable the exact HTTP(S) scheme, host, and port, then re-enable it from the popup or settings when needed.