Developer Tools
Format JSON online, beautify minified payloads, and validate JSON instantly for APIs, logs, configs, and debugging.
Use this free JSON Formatter to format JSON online, beautify minified JSON, and pretty print complex objects instantly. It is useful for API responses, webhook payloads, application logs, configuration files, exported JSON data, and frontend or backend debugging. Paste raw or compact JSON to make it readable, inspect nested objects and arrays, and catch invalid syntax before using the data in your app, script, request, or documentation.
Use this free JSON Formatter to format JSON online, beautify minified JSON, and pretty print complex objects instantly. It is useful for API responses, webhook payloads, application logs, configuration files, exported JSON data, and frontend or backend debugging. Paste raw or compact JSON to make it readable, inspect nested objects and arrays, and catch invalid syntax before using the data in your app, script, request, or documentation.
Use json formatter when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
JSON Formatter is best when you want readable pretty output. JSON Validator is better when your main question is simply whether the JSON syntax is valid. If you need both readability and a syntax check, JSON Formatter is the better first step.
JSON Formatter adds indentation and line breaks so JSON is easier to inspect. JSON Minifier removes whitespace so the payload becomes compact. Use Formatter when you want readability, and Minifier when you want smaller output.
If your formatted JSON is still invalid, open JSON Validator. If you want a compact one-line version after inspection, use JSON Minifier. If you want to move the data into rows and columns, try JSON to CSV. If the payload contains escaped characters, you may also want JSON Unescape.
For JSON tools, privacy matters. If your formatter runs fully in the browser, the pasted JSON stays on the client side instead of being uploaded to a server. This is especially useful when working with logs, configs, payloads, and private API data.
JSON Formatter is best when you want readable structured output. JSON Validator is better when you only need a quick valid or invalid result. If you need both readability and syntax checking, the formatter is a strong starting point.
JSON Formatter expands JSON with indentation and line breaks. JSON Minifier does the opposite by removing unnecessary whitespace to reduce size. Use the formatter for debugging and the minifier for compact output.
After formatting your payload, you may also want to check it with JSON Validator or compress it for transport with JSON Minifier. If your JSON needs to be turned into tabular data, try JSON to CSV.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
{"name":"John","age":30} Output
{
"name": "John",
"age": 30
} Useful when you copy compact JSON from an API response or script and want to read it quickly.
Input
{"status":200,"data":{"user":{"id":17,"name":"Anna"},"roles":["admin","editor"]}} Output
{
"status": 200,
"data": {
"user": {
"id": 17,
"name": "Anna"
},
"roles": [
"admin",
"editor"
]
}
} Makes nested API payloads much easier to inspect during backend or frontend debugging.
Input
{"items":[{"id":1,"name":"Pen"},{"id":2,"name":"Book"}]} Output
{
"items": [
{
"id": 1,
"name": "Pen"
},
{
"id": 2,
"name": "Book"
}
]
} Helpful when reviewing returned lists of products, records, tickets, or search results.
Input
{"event":"login","success":true,"ip":"192.168.1.10","meta":{"browser":"Chrome","device":"Desktop"}} Output
{
"event": "login",
"success": true,
"ip": "192.168.1.10",
"meta": {
"browser": "Chrome",
"device": "Desktop"
}
} Useful for reading JSON logs copied from monitoring tools, browser consoles, or server output.
Input
{"type":"payment.succeeded","data":{"id":"pay_123","amount":4999,"currency":"USD"}} Output
{
"type": "payment.succeeded",
"data": {
"id": "pay_123",
"amount": 4999,
"currency": "USD"
}
} Helpful when testing third-party webhooks and checking field names, event types, and payload structure.
Input
{"env":"production","features":{"cache":true,"debug":false},"ports":[3000,3001]} Output
{
"env": "production",
"features": {
"cache": true,
"debug": false
},
"ports": [
3000,
3001
]
} Useful when reading app settings, feature flags, or exported configuration blocks.
Input
{"company":{"name":"Acme","departments":[{"name":"Engineering","teams":[{"name":"Platform","members":12}]}]}} Output
{
"company": {
"name": "Acme",
"departments": [
{
"name": "Engineering",
"teams": [
{
"name": "Platform",
"members": 12
}
]
}
]
}
} Useful when nested data becomes difficult to read in one-line JSON output.
Input
{"users":[{"id":1,"email":"a@example.com"},{"id":2,"email":"b@example.com"}],"total":2} Output
{
"users": [
{
"id": 1,
"email": "a@example.com"
},
{
"id": 2,
"email": "b@example.com"
}
],
"total": 2
} Useful for checking exported data before converting it to another format.
Input
{"name":"John",} Output
Invalid JSON
Trailing commas are not valid in JSON and should be removed before formatting.
Input
{name:"John"} Output
Invalid JSON
JSON keys must use double quotes, unlike some JavaScript object literals.
Input
{"company":{"name":"Acme","departments":[{"name":"Engineering","teams":[{"name":"Platform","members":12}]}]}} Output
{
"company": {
"name": "Acme",
"departments": [
{
"name": "Engineering",
"teams": [
{
"name": "Platform",
"members": 12
}
]
}
]
}
} Useful when nested data becomes difficult to read in one-line JSON output.
Input
{"users":[{"id":1,"email":"a@example.com"},{"id":2,"email":"b@example.com"}],"total":2} Output
{
"users": [
{
"id": 1,
"email": "a@example.com"
},
{
"id": 2,
"email": "b@example.com"
}
],
"total": 2
} Useful for checking exported data before converting it to another format.
Fix: Remove the last comma after the final key-value pair in an object or array.
Fix: Make sure every JSON key uses double quotes, for example "name" instead of name.
Fix: Replace single quotes with double quotes for JSON keys and string values.
Fix: Check every opening brace and bracket to make sure it has a matching closing character.
Fix: Copy the full object or array so the formatter can parse the complete structure.
A JSON formatter converts compact or messy JSON into a readable structure with indentation and line breaks.
Yes. JSON formatter and JSON beautifier usually mean the same thing: making JSON easier to read.
Yes. A browser-based JSON formatter lets you paste JSON and beautify it instantly without extra software.
Yes. If the input is not valid JSON, the tool returns an error instead of formatted output.
JSON Formatter focuses on readability, while JSON Validator focuses on checking whether the syntax is valid. This page does both, but the validator page is better if you only need a fast validity check.
JSON Formatter adds whitespace and indentation for readability, while JSON Minifier removes whitespace to make valid JSON smaller and more compact.
The most common reasons are trailing commas, missing double quotes around keys, single quotes, broken brackets, or incomplete pasted data.
Yes. Nested objects, arrays, and mixed structures are formatted into a much clearer layout.
Yes. It is especially useful for inspecting API responses, webhook payloads, and JSON logs.
Yes. It is useful for reading and checking JSON configuration objects before using them in apps or deployment workflows.
If your implementation runs in the browser only, the JSON stays on the client side, which is useful for quick local formatting tasks.
Use the JSON Validator page when your main goal is to confirm syntax quickly without focusing on pretty output.
Yes. A browser-based JSON formatter lets you paste JSON and beautify it instantly without extra software.
Yes. It is useful for reading and checking JSON configuration objects before using them in apps or deployment workflows.