Understanding JSON Errors: Common Mistakes and How to Fix Them

💥 Introduction

JSON (JavaScript Object Notation) is a lightweight format for structuring data — but it can be surprisingly easy to mess up. A single missing bracket, comma, or quote can cause your app or API to fail.

In this article, you'll learn:

• The most common JSON syntax errors
• How to quickly fix them
• How to use JSONFormatterTool.com to detect them instantly

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🚫 1. Missing or Extra Commas

❌ Incorrect:

{
  "name": "Abhijit"
  "role": "Developer"
}

✅ Fix:

{
  "name": "Abhijit",
  "role": "Developer"
}

Tip: Always separate key-value pairs with commas. No comma after the last item.

---

🔑 2. Unquoted Keys or Values

❌ Incorrect:

{
  name: Abhijit
}

✅ Fix:

{
  "name": "Abhijit"
}

Tip: Both keys and string values must be in double quotes.

---

🧩 3. Mismatched Brackets or Braces

❌ Incorrect:

{
  "name": "Abhijit",
  "skills": ["JS", "Python"
}

✅ Fix:

{
  "name": "Abhijit",
  "skills": ["JS", "Python"]
}

Tip: Always close your arrays [] and objects {} properly.

---

🧪 4. Using Single Quotes Instead of Double Quotes

❌ Incorrect:

{
  'role': 'admin'
}

✅ Fix:

{
  "role": "admin"
}

Tip: JSON is stricter than JavaScript. Only double quotes are allowed.

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🧰 How to Fix JSON Errors Instantly (Without Coding)

Head to JSONFormatterTool.com and:

1. Paste your JSON into the input box
2. Click "Validate" or "Format"
3. See exactly where the error occurs — line number + description
4. Fix the issue, re-validate, and you're done!

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🧠 Bonus: Tips to Avoid Future JSON Errors

• ✅ Use an online validator before saving or sending JSON
• 🧼 Format/beautify your JSON to make structure visible
• 📌 Never use trailing commas
• 🔒 Copy-paste from known-good sources when possible

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✅ Final Thoughts

JSON is simple — but it's strict. One wrong character can break your app. Fortunately, with tools like JSONFormatterTool.com, fixing those errors is fast, easy, and code-free.

Stay clean. Stay valid. Keep building.