Kotlin/kotlinx.serialization

Health v2 · maintenance only

Adoption not part of the score

5943 stars · 676 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Kotlin multiplatform serialization library consisting of a compiler plugin and runtime that generates serialization code for @Serializable classes without reflection. It supports JSON, Protobuf, CBOR, HOCON, and Properties formats across JVM, JS, and Native targets.

Use cases

• encode kotlin data classes to
• parse into kotlin objects
• serialize objects to protobuf in kotlin
• decode cbor payloads in a multiplatform app
• share serialization logic between jvm js and native kotlin
• convert kotlin objects to and from properties files

When to choose

• you need reflectionless, high-performance serialization in Kotlin
• you want one serialization API shared across Kotlin Multiplatform targets
• you need JSON, Protobuf, CBOR, HOCON, or Properties support in Kotlin

When to avoid

• your project is not in Kotlin
• you need exotic formats not covered by the built-in format libraries
• you rely on runtime reflection-based serialization of arbitrary classes

Facets

library · maturity stable

serialization developer-tools cross-platform apis jvm windows cross-platform kotlin multiplatform compiler-plugin cbor protobuf reflectionless android ios nodejs linux macos

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