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JSON Formatter for Python Developers

Format, pretty print, and validate JSON online — the browser alternative to Python json.dumps(indent=2). No code needed, works with any API response.

Working with JSON in Python and need to quickly format a raw payload without running a script? Our online JSON formatter works exactly like json.dumps(data, indent=2) — instantly pretty prints any minified JSON in your browser.

Online Equivalent of Python json.dumps(indent=2)

Python's json.dumps(data, indent=2, sort_keys=True) is the standard way to pretty print JSON in a script. But when you just need to read a raw JSON blob quickly, our online formatter is faster than running Python code.

How Python Developers Use This Tool

  • API debugging: Paste response JSON from Postman, curl, or browser DevTools directly.
  • File inspection: Copy-paste content from .json files to check structure before loading with json.load().
  • Error diagnosis: If json.loads() throws a JSONDecodeError, paste the text here to see the exact error location.

Python json Module Quick Reference

import json

# Parse
data = json.loads(text)

# Format / pretty print
pretty = json.dumps(data, indent=2, sort_keys=True)

# Validate safely
try:
    json.loads(text)
    print("Valid JSON")
except json.JSONDecodeError as e:
    print(f"Error at line {e.lineno}: {e.msg}")

Who this guide is for

  • Format API responses from requests.get().json() for readability
  • Inspect JSON config files before editing with Python scripts
  • Debug FastAPI and Django REST framework JSON payloads
  • Quickly check JSON without writing a temporary Python script

Try the free JSON Formatter

Runs entirely in your browser — no upload, no signup, and your data never leaves your device.

Open JSON Formatter

Frequently Asked Questions

Is this the same as Python json.dumps(indent=2)?

Yes. The output is identical to json.dumps(data, indent=2) — 2-space indented, RFC 8259 compliant JSON. You can also choose 4 spaces or tabs.

Can I use this to debug FastAPI response JSON?

Absolutely. Copy the raw response from your browser DevTools Network tab or from curl output and paste it directly.

Does it support Python dict syntax (single quotes)?

No — Python dicts use single quotes, which is not valid JSON. Use json.dumps() first to convert to proper JSON, then paste here.

Tools mentioned in this guide

Related JSON Topics & Reference Articles