Stop wasting vertical screen space.

A "fractal" formatter that groups simple JSON lists and coordinates onto single lines, while keeping complex nested payloads expanded. Lightweight, width-aware, and super fast.

Download VSIX Release Try Live Demo

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Fractal Formatting

Decides dynamically if lists or objects are compact enough to look clean on a single line.

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Zero Dependencies

Written in 100% pure TypeScript. No external runtimes or Python required anymore.

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Width Aware

Ensures no line exceeds your maximum configured width, scaling structures elegantly.

Interactive Playground

Paste your JSON below to see the formatting difference in real time.

Max Line Width: 120

Indentation:

Sort keys alphabetically Strip JSON comments

Raw Input JSON

Smart Formatted Output

Ready

How to Install in VS Code / IDE

Download

Get the latest compiled `.vsix` file from the repository releases page.

Install Extension

Run the install command in your terminal or install via the Extensions tab in your IDE.

code --install-extension smart-json-formatter-1.0.7.vsix

Format

Open a JSON file, right-click, select **Format Document With...** and make Smart JSON Formatter default.