utilities
JSON Formatter / JSON Validator
Paste JSON and format, validate, minify, copy, or download it in the browser.
01
Paste JSON
Paste an API response, config file, or log snippet to validate JSON quickly.
Browser processedNot storedStandard JSON
02
Formatted result
Standard JSON only. JSON5 and trailing commas are shown as errors.
ModeFormat
Indentation2
Bytes0
Valid JSON-
utilities
JSON Formatter / JSON Validator
Paste JSON and format, validate, minify, copy, or download it in the browser.
Last updated2026-05-15
StabilityStable
Request tags linked to this page
01
Paste JSON
Paste an API response, config file, or log snippet to validate JSON quickly.
Browser processedNot storedStandard JSON
02
Formatted result
Standard JSON only. JSON5 and trailing commas are shown as errors.
ModeFormat
Indentation2
Bytes0
Valid JSON-
Quick note about this tool
The feedback text, tool name, and page path may be stored for triage.
JSON Formatter / JSON ValidatorWhat this tool is for
JSON Formatter / JSON Validator validates standard JSON as soon as it is pasted, then formats with 2 or 4 spaces, minifies, copies, or downloads the result in the browser. It does not support JSON5 or schema validation.
The pasted JSON is formatted, minified, and validated in the browser. varo72 does not store the content.
Files and tool inputs are processed in your browser and are not kept in default file storage.
Visitor analytics may count page views, searches, and download events through Plausible or first-party events, and may use a localStorage visitor ID to reduce duplicate counts.
When you submit feedback, the feedback text, tool name, and page path may be stored so the issue can be triaged and followed up.
JSON Formatter / JSON Validator validates standard JSON in the browser, formats it with readable indentation, minifies it to one line, and prepares copy or download output without storing the pasted content.
Good fit for these cases
JSON -> JSON, Text
When you need to format an API response or pasted JSON so it is easier to read.
When you need to confirm that pasted text is valid standard JSON.
When you want to minify JSON to one line before copying or downloading it.
Frequently asked questions
These short answers help search visitors confirm the tool fit without leaving the page.
What does JSON Formatter / JSON Validator do?
It validates standard JSON, formats it with indentation, minifies it, and prepares copy or download output in the browser.
Which file formats work with JSON Formatter / JSON Validator?
This page accepts JSON and prepares JSON, Text output.
When should I use JSON Formatter / JSON Validator?
Use it when you need to format, validate, or minify standard JSON without sending it to a server.