Does it validate the JSON body's syntax?

Yes, invalid JSON in the body is flagged rather than silently displayed as broken formatted output.

Can I paste a raw response copied from curl or a browser's network tab?

Yes, paste in the raw response text from any source and it parses out the status line, headers and body.

Does it pretty-print the JSON body?

Yes, the JSON body is formatted with proper indentation for readability, not left as a dense single line.

Does API Response Viewer upload my files to a server?

No. API Response Viewer runs entirely in your browser using on-device processing, your files never leave your device.

API Response Viewer

Format a raw HTTP response into a readable status, headers and JSON body view.

Runs in your browser

Raw HTTP response (or just a JSON body)

About this tool

A raw HTTP response — status line, headers, and often a JSON body all mashed together — is hard to read as one dense block of text, especially with a large JSON payload. This tool formats a raw HTTP response into a readable status, headers and JSON body view, making it far easier to scan and debug an API response than reading the raw text.

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