fjson-fmt

FracturedJson, in your browser

GitHub npm

Input

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Options

    

      
      
      
      
      
    

  


  

    

      
Use it in your project

      
A Prettier / oxfmt-style --check + --write CLI for JSON. Ships prebuilt WASM — no Rust toolchain needed.

      
npm i -D fjson-fmt

# format in place (default)
fjson-fmt "**/*.json"

# verify in CI — exits 1 if anything would change
fjson-fmt --check "**/*.json"

# stdin → stdout
cat data.json | fjson-fmt --stdin

      
Run alongside oxfmt (which owns JS/TS/CSS):

      
{
  "scripts": {
    "fmt": "oxfmt && fjson-fmt \"**/*.json\"",
    "fmt:check": "oxfmt --check && fjson-fmt --check \"**/*.json\""
  }
}

    


    

      
Programmatic API

      
The same import works in Node and the browser (isomorphic). format() is async and initializes the engine on first use.

      
import { format } from "fjson-fmt";

const pretty = await format(json, {
  max_total_line_length: 120,
  indent_spaces: 2,
});

      
In Node a synchronous path is available immediately:

      
import { formatSync } from "fjson-fmt";
const out = formatSync(json, { number_list_alignment: "right" });