If you work with APIs, you deal with JSON. Most APIs return minified JSON – no spaces, no line breaks. Unreadable to humans.
A JSON formatter tool fixes that. Paste minified JSON, click format, and you get indented, readable output. Use our free JSON formatter here.
Why Format JSON?
Imagine reading a paragraph with no spaces or periods. That's minified JSON. Formatting adds line breaks and indentation so you can see the structure at a glance.
When your API call fails, the error message is inside the JSON. Without formatting, finding the error takes forever. With formatting, you spot it in seconds.
Common Use Cases
Debugging API responses. Copy the response from your browser or terminal, paste into the formatter, and instantly see the structure.
Writing JSON manually. Write messy JSON, then format it to check your brackets and commas. Much easier than staring at a single line.
Teaching or documenting. Formatted JSON is readable. Minified is not. Always format before sharing examples.
Comparing JSON files. Format both files first. Then use a diff tool to spot differences.
How to Use the Tool
Open the JSON formatter. Paste your JSON into the input box. Click Format. The formatted JSON appears below. Click Copy to copy it to your clipboard.
The validator also checks if your JSON is valid. If you're missing a comma or bracket, it'll tell you where the error is.
Example
Minified input:
{"name":"John","age":30,"cars":["Ford","BMW","Fiat"]}
Formatted output:
{
"name": "John",
"age": 30,
"cars": [
"Ford",
"BMW",
"Fiat"
]
}
Much easier to read.
Tips for Working with JSON
Always validate before using. One missing comma breaks everything. Formatting helps catch these errors.
Use consistent indentation. 2 spaces or 4 spaces. Stick to one. Our formatter uses 2 spaces.
Keep it organized. Group related fields together. Use comments if your system supports them (standard JSON doesn't, but JSON5 does).
Try the JSON formatter on your next API project.