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FizzKit

JSON Formatter

Format and beautify JSON instantly in your browser. Choose 2-space, 4-space, or tab indentation, collapse nested keys, and catch syntax errors with precise line and column positions. Runs entirely client-side.

Runs locally in your browser
For large JSON, open fullscreen to use the whole screen
JSON input
0 chars · 1 line
Output
Output
Output will appear here…

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Click any value in your JSON to copy its path.

YAML to JSON

Convert YAML config into strict JSON.

About JSON Formatter

Format and beautify JSON instantly in your browser. Choose 2-space, 4-space, or tab indentation, collapse nested keys, and catch syntax errors with precise line and column positions. Runs entirely client-side.

JSON Formatter is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

No. FizzKit formats JSON entirely in your browser using the native JSON parser. Nothing is uploaded or logged.