Why are JSON API responses minified?

APIs minify JSON responses to reduce payload size and speed up data transfer. That is efficient for machines but difficult for humans to read — that is what the formatter is for.

Can I format a JSON response from curl?

Yes. Copy the raw JSON from your terminal curl output and paste it into FixTools. Alternatively, pipe curl output through `python3 -m json.tool` or `jq .` in the terminal.

Does FixTools send my API response to a server?

No. All formatting happens entirely in your browser using JavaScript. Your API response data never leaves your device.

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Format JSON API Responses Online

API responses often arrive as a single compressed line — hard to read and harder to debug. Paste any JSON API response into FixTools and it formats it instantly with proper indentation and syntax highlighting, so you can inspect the structure, check field names, and spot issues without writing a line of code.

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Cost: Free forever
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Processing: In your browser
Privacy: Files stay local

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Instant formatting from API clipboard paste

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Highlights nested objects and arrays

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Validate response structure on the spot

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JSON Formatter

All processing happens in your browser — your files are never uploaded to any server.

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How to use this tool

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Copy the raw JSON from your API response (curl output, Postman, browser DevTools) and paste it here to format it.

How It Works

Step-by-step guide to format json api responses online:

1
Copy the API response
Copy the raw JSON from curl output, Postman, browser DevTools Network tab, or your HTTP client.
2
Paste into FixTools
Paste the raw JSON into the editor.
3
Format and inspect
Click Format. The response is immediately readable with full indentation and syntax highlighting.