JSON Formatter and Validator Online
Prettify, minify, and validate JSON directly in the browser for payload review and debugging.
Quick answer
This page prettifies, minifies, and validates JSON directly in the browser.
Use it to inspect copied API payloads, shrink JSON before transport, or confirm that a request body is valid before sending it.
Input JSONPaste raw JSON
OutputFormatted result
How to use
- Paste raw JSON into the input panel.
- Choose Prettify, Minify, or Validate.
- Copy the result or read the validation message.
Common questions this page answers
- How do I format JSON online?
- How do I validate JSON before sending a request?
- How do I minify JSON for transport?
Example input and output
Input
{"user":"sam","roles":["admin","ops"],"active":true}Output in prettify mode
{
"user": "sam",
"roles": [
"admin",
"ops"
],
"active": true
}FAQ
What does validate mode do?
Validate mode checks whether the JSON parses without changing the structure.
How are errors shown?
Invalid JSON is shown with a parsing error message in the output panel.
When should I minify instead of prettify?
Minify is useful for compact transport, while prettify is useful for inspection and debugging.