Format parses the JSON and re-serializes it with 2-space indentation and syntax coloring — keys in blue, strings in green, numbers in orange, booleans in purple.

Minify parses the JSON and re-serializes it with no extra whitespace, producing the most compact valid JSON string.

How does error reporting work?

When JSON is invalid, the tool extracts the character position from the browser's built-in parser and converts it to a line number and column number for easy debugging.

Is my JSON sent to a server?

No. All processing happens in your browser using the native JSON.parse() and JSON.stringify() functions. No data leaves your device.

What is the Tree View?

The Tree View renders the parsed JSON as a collapsible tree so you can navigate nested objects and arrays without reading raw text.

JSON Formatter

Name: JSON Formatter
Availability: InStock
Author: Nham Vu

Paste JSON to format it with syntax highlighting, minify it, or validate it and get precise error location information.

JSON Input

Paste JSON here

Results

Paste JSON on the left, then click Format, Minify, or Validate.

Tree View

Tree view appears after a successful Format.

Summary

Paste JSON to format it with syntax highlighting, minify it, or validate it and get precise error location information.

How it works

Paste your JSON into the input field on the left.
Click Format to pretty-print with 2-space indentation and syntax highlighting.
Click Minify to collapse the JSON to a single line.
Click Validate JSON to check if the JSON is valid — errors show the exact line and column.
Use the Tree View panel to explore the JSON structure interactively.

Use cases

Debug API responses by formatting minified JSON for readability.
Validate JSON configuration files before deploying.
Minify JSON for embedding in production code.
Explore large JSON objects using the collapsible tree view.

Frequently Asked Questions

Last updated: 2026-06-25 · Reviewed by Nham Vu