JSON Formatter

100% Client-Side

Format, prettify, and repair JSON code instantly with customizable indentation options, line metrics, and zero data leaving your browser. Online JSON formatter for developers.

Home/JSON Formatter

Format Validate Beautify Tree View Minify Diff JSON → CSV CSV → JSON JSON → YAML YAML → JSON

Key Capabilities

Configurable indent size (2 spaces, 4 spaces, 8 spaces, or Tabs)

Auto-repair trailing commas, unquoted keys, and single-quote strings

Live statistics: Line count, byte size, key count, and nesting depth

Frequently Asked Questions

How does the JSON Formatter handle malformed JSON?

Click the 'Auto-Fix' button to fix common syntax mistakes such as single quotes, trailing commas, and unquoted object keys automatically.

Is my JSON data safe?

Yes, all processing takes place entirely in your web browser. No data is sent to any external server.