The Future of JSON: Emerging Standards and Trends in 2026

jsonfuturetrendsjson5jsonc

JSON has been the web's data format for over two decades. While the core format stays stable, the ecosystem around it continues to evolve.

JSONC (JSON with Comments)

Already widely adopted in VS Code and many tools:

{


  // This is a comment


  "name": "My Project",


  /* Multi-line


     comments work too */


  "version": "1.0.0"


}

Used in: tsconfig.json, VS Code settings, and increasingly in other tools.

JSON5 Format

A more human-friendly superset of JSON:

{


  // Comments


  name: 'Unquoted keys',       // Single quotes OK


  items: [1, 2, 3,],           // Trailing commas OK


  multiline: "Line 1\nLine 2", // Multiline strings


  hex: 0xFF,                   // Hex numbers


  inf: Infinity,               // Special values


}

Typed JSON Proposals

Efforts to add type information to JSON:

{


  "name": { "_type": "string", "value": "Alice" },


  "birthday": { "_type": "date", "value": "1990-01-15" },


  "balance": { "_type": "decimal", "value": "1234.56" }


}

JSON Schema Evolution

JSON Schema continues to advance:

  • Draft 2020-12 — Current standard with better composition

  • Better tooling — Auto-generation from TypeScript, OpenAPI

  • Wider adoption — API validation, config validation, form generation

    • Performance Trends

  • simdjson — Parse JSON at gigabytes per second using SIMD

  • Binary formats — Protocol Buffers, MessagePack, CBOR for transport

  • Streaming parsers — Better support for large files

  • WASM parsers — Near-native speed in the browser

    • What Won't Change

  • JSON's core syntax is stable and won't break

  • It remains the default for web APIs

  • Human readability stays a priority

  • Interoperability across all languages continues

    • The Verdict

    JSON isn't going anywhere. New formats complement it rather than replace it. The most important trends are better tooling (validation, schemas) and performance (streaming, SIMD parsing).

    Use our JSON tools — Formatter, Validator, Viewer, Minifier — to work with JSON effectively today and tomorrow.

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