1. Paste JSON data
Paste JSON from an API response, webhook body, config file, package data, log entry, test fixture, or documentation example.
Free JSON formatter · developer tool · browser-based
JSON Formatter Online
Paste JSON from an API response, config file, webhook payload, log, or test fixture. Format it for readability, minify it for compact output, or validate parse errors before debugging further.
Input JSON
Paste JSON from an API response, config file, webhook payload, log, or test fixture.
Runs in your browser. Avoid pasting secrets, tokens, private logs, or sensitive production payloads into any online utility.
Formatted output
Format, minify, validate, copy, download, or reuse the result.
Ready. Paste JSON to format, minify, or validate.
Output chars0
JSON nodes0
StatusWaiting
ProcessingLocal browser
Processed locally in your browser
How to use the JSON formatter
Use this formatter when structured JSON is difficult to read, compacted into one line, or failing to parse in a development workflow.
2. Format, minify, or validate
Use Format JSON to make the structure readable, Minify to compact it, or Validate to check whether the input can be parsed as standard JSON.
3. Copy or download the result
Copy the cleaned output, download it as a JSON file, or move the output back into the input when you want to continue editing.
Common JSON formatting use cases
JSON formatting is most useful when you need to inspect structure quickly before making a development decision.
API responses and webhook payloads
Pretty print compact API responses or webhook payloads so nested fields, arrays, and object keys are easier to inspect.
Config files and test data
Format JSON config, fixture data, package snippets, or docs examples before sharing them with teammates or pasting them into tests.
Debugging malformed JSON
Use validation feedback to catch missing quotes, trailing commas, broken braces, invalid comments, or other parse errors before debugging application code.
JSON formatting tips
Small formatting choices can make JSON easier to review without changing the underlying data.
Use indentation for review
Two spaces are usually readable for docs and API examples. Four spaces can help when reviewing deeply nested JSON by hand.
Minify only when compact output is needed
Minified JSON is harder to read but useful for compact payload examples, storage snippets, or systems where whitespace does not matter.
Use nearby developer tools when needed
For encoded payload values, try Base64 Encoder Decoder. For URLs inside JSON, use URL Encoder Decoder.
JSON formatter FAQ
What does a JSON formatter do?
A JSON formatter parses JSON and prints it with indentation so objects, arrays, keys, and values are easier to scan while debugging or reviewing data.
Can this tool minify JSON?
Yes. Minify mode removes unnecessary spaces and line breaks while preserving the same JSON data structure.
Why is my JSON invalid?
Common JSON errors include trailing commas, missing double quotes around keys, single quotes, comments, unclosed braces, and invalid values.
Does the JSON formatter upload my data?
For normal use, formatting and validation run in your browser. Avoid pasting secrets, tokens, private keys, or highly sensitive production data into any online utility.
Helpful JSON formatting guides
Learn how to format JSON, read errors, and clean structured developer data before debugging.
