JSON Serialization Overview

CodableJSON provides high-performance JSON serialization that extends standard JSON to handle JavaScript types that JSON can’t serialize natively.

Quick Start

import { encode, decode } from "codablejson";
 
const data = {
  date: new Date("2025-01-01"),
  set: new Set(["a", "b", "c"]),
  map: new Map([["key", "value"]]),
};
 
const encoded = encode(data);
// Result: {
//   date: { $$Date: "2025-01-01T00:00:00.000Z" },
//   set: { $$Set: ["a", "b", "c"] },
//   map: { $$Map: [["key", "value"]] }
// }
 
const decoded = decode(encoded);
// decoded.date instanceof Date === true

Open playground  to test your own data.

Key Features

• Serializes JavaScript types: Date, BigInt, Map, Set, RegExp, Symbol, Error, URL, typed arrays, and more
• Human-readable output: Uses tagged format that’s still readable and debuggable
• Great performance: ~3x faster encoding and ~2x faster decoding than SuperJSON
• Reference preservation: Handles circular references and maintains object identity
• Type safety: Full TypeScript support with autocompletion

Stringify & Parse

For convenience, CodableJSON provides stringify and parse functions that combine encoding/decoding with JSON stringification:

import { stringify, parse } from "codablejson";
 
const jsonString = stringify(data);
const restored = parse(jsonString);

Try It Out

Experiment with CodableJSON in the playground  to see how different types are encoded and test circular reference handling.