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Best JSON Alternatives ranked by AI · updated May 2025

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JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is widely used for data exchange between web servers and browsers.

Top 6 JSON alternatives

1

XML

XML is a markup language that is designed to store and transport data.

Pros

  • Structured format
  • Supports validation
  • Well-established

Cons

  • Verbose syntax
  • Complex to read and write
5 Messagepack logo

Messagepack

MessagePack project

MessagePack is an open-source binary serialization format with implementations for many programming languages. It is used by developers who need compact, fast...

Pros

  • Smaller and faster than JSON for many workloads
  • Schema-free, which simplifies interoperability and evolution
  • Available across a wide range of programming languages

Cons

  • Less self-describing and debuggable than JSON
  • Provides fewer schema and compatibility guarantees than Protocol Buffers
  • Type-system differences can create cross-language edge cases

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