JSON Formatter & Validator
Turn messy JSON strings into beautifully structured, readable code. Our tool validates your syntax in real-time and helps you spot errors instantly.
Why use a JSON Formatter?
JSON is the backbone of modern web communication. However, raw API responses are often minified to save bandwidth, making them nearly impossible for humans to read. A JSON Formatter (also known as a JSON Beautifier) adds proper indentation and line breaks, transforming a wall of text into a structured tree that's easy to debug.
Strict JSON Validation
Our tool doesn't just make your data look pretty; it ensures it's 100% valid. We check for common mistakes such as:
- Missing Quotes: All keys must be in double quotes.
- Trailing Commas: Commas after the last item are not allowed.
- Incorrect Brackets: Mismatched
{ }or[ ]. - Data Types: Ensures strings and numbers are properly formatted.
Developer Best Practices
While formatting is great for debugging, always minify your JSON before sending it over the network to improve performance.
All processing in this tool happens in your browser. Your data is never uploaded to our servers, keeping sensitive API keys secure.
We use a standard 2-space indentation, which is the industry default for most configuration files and API responses.