Developer
JSON Formatter
Format, validate, and inspect JSON snippets while working with APIs and automation tools.
Sample JSON is valid.
Result
{
"project": "workflowtools.space",
"type": "free tools website",
"categories": [
"SEO",
"Developer",
"Business"
],
"active": true
}How to use this tool
- Paste JSON into the input area or load the sample JSON.
- Choose Format JSON to create readable indentation, or Minify JSON to remove extra whitespace.
- Use Validate JSON when you only want to check whether the input parses correctly.
- Copy the result and use it in your API client, automation step, or configuration field.
Practical examples
A developer can format a webhook payload before checking which fields are available.
An automation builder can minify JSON before pasting it into a request body field.
A support teammate can validate a copied API response before sharing it with an engineer.
Common mistakes to avoid
- Using single quotes around strings or object keys.
- Leaving a trailing comma after the last item in an object or array.
- Pasting JavaScript objects with comments and expecting them to be valid JSON.
- Minifying a payload before reviewing whether sensitive data is included.
Useful internal links
Frequently Asked Questions
Does this JSON formatter send data to a server?
No. The formatting, minifying, and validation logic runs in your browser with standard JavaScript parsing.
Why does valid-looking JSON fail validation?
Common causes include trailing commas, single quotes, comments, missing quotes around keys, or an extra bracket.
When should I minify JSON?
Minify JSON when you need a compact value for a config field, test request body, or storage field. Keep formatted JSON for review.
What validation means in this tool
- Validation uses JavaScript JSON.parse, so comments, trailing commas, single-quoted strings, undefined, and other non-JSON syntax are rejected.
- Formatting serializes parsed data with two-space indentation; minifying serializes the same parsed value without optional whitespace.
- Editing the input clears the previous output so an older successful result is not presented as though it belongs to the new text.
Inspect structured data before using it
Who this helps
Useful for developers, automation builders, and support teams reviewing API payloads or configuration snippets.
A practical workflow
Remove secrets, format the payload, inspect nesting and required fields, then test the copy in a development environment.
Important limitation
Syntax validation cannot prove that fields match an API schema or that their business meaning is correct.
Privacy note
Parsing happens in the browser. Even so, anonymize production responses and remove tokens before pasting them.