A fast, spec-compliant ZON parser and serializer for JavaScript.

ZON is a compact, human-readable, and easy-to-parse data format from the Zig programming language that is similar to JSON in JavaScript.

The API is similar to the native JSON API.

Try it in the Playground

npm install zzon

import { ZON } from 'zzon';

const zon = ZON.stringify({"a":1,"b":"abc","c":true});
console.log(zon); // .{.a=1,.b="abc",.c=true}

import { ZON } from 'zzon';

const json = ZON.parse(`.{.a=1,.b="abc",.c=true}`);
console.log(json); // {"a":1,"b":"abc","c":true}

Performance comparison between ZON and JSON (source: test/index.test.ts):

Hardware: Apple M1 Pro
Platform: darwin 25.0.0 (arm64)

Last updated: 2025-10-24T03:55:48.380Z

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MIT