JSON Formatter & Validator

Format, validate, and beautify JSON instantly. Copy as markdown code block or share as a beautiful webpage.

Indent:

Input JSON

Formatted Output

Formatted JSON will appear here

Features

Format & Beautify

Validate JSON

Minify JSON

Copy as Markdown

Syntax Highlighting

Error Detection

Custom Indentation

Sort Keys

Share Instantly

Share Formatted JSON Instantly

Need to share JSON with your team? markshare turns your formatted JSON into a beautiful, shareable webpage with syntax highlighting in one click.

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FAQ

What is JSON formatting?

JSON formatting (or beautifying) adds proper indentation and line breaks to make JSON data human-readable. Minified JSON is compact but hard to read; formatted JSON is easy to understand.

How does validation work?

The validator checks if your JSON follows proper syntax - matching braces, correct quotes, valid data types, etc. If there's an error, it shows you exactly where the problem is.

Is my data secure?

Yes! All processing happens in your browser. Your JSON is never sent to any server. It's completely private and secure.

What does "Copy as Markdown" do?

It wraps your formatted JSON in a markdown code block with syntax highlighting. Perfect for pasting into GitHub issues, README files, or documentation.