Protocol Buffers - Google's data interchange format

• UpdatedFeb 20, 2026
• C++

FlatBuffers: Memory Efficient Serialization Library

• UpdatedFeb 19, 2026
• C++

A lightweight library for converting complex objects to and from simple Python datatypes.

• UpdatedFeb 4, 2026
• Python

A blazingly fast multi-language serialization framework powered by JIT and zero-copy.

• UpdatedFeb 20, 2026
• Java

🎷No ceremony, just code. Blazing fast, typesafe binary serialization.

• UpdatedFeb 17, 2026
• C#

macOS app to generate Swift 5 code for models from JSON (with Codeable)

• UpdatedNov 24, 2025
• Swift

Fast and well tested serialization library

• UpdatedFeb 9, 2026
• Python

Programming language agnostic type construction language based on polynomials.

• UpdatedMay 29, 2024
• Idris

Kim: A JSON Serialization and Marshaling framework

• UpdatedFeb 16, 2020
• Python

Conditional marshalling for Go

• UpdatedOct 3, 2024
• Go

Efficient CBOR and JSON (de)serialization in Scala

• UpdatedJan 12, 2026
• Scala

Highly configurable, fast JSON encoder for Go

• UpdatedJul 28, 2023
• Go

A curated list of awesome Python libraries, which implement models, schemas, serializers/deserializers, ODM's/ORM's, Active Records or similar patterns.

• UpdatedMay 7, 2018

The bit level data interchange format for serializing data structures (long term maintenance).

• UpdatedOct 12, 2025
• C

Android Bundle format support for Kotlinx Serialization.

• UpdatedFeb 15, 2024
• Kotlin

Fast and simple JSON encoding toolkit

• UpdatedDec 9, 2023
• Haskell

Define your JSON schema as Python dataclasses

• UpdatedSep 23, 2023
• Python

BeanIO 3, a Java library for marshalling and unmarshalling bean objects from XML, CSV, delimited and fixed length stream formats.

• UpdatedFeb 7, 2025
• Java

Flask-Arrested: A Framework For Rapidly Building REST APIs with Flask.

• UpdatedNov 9, 2019
• Python

JSON serialization framework for Nim, works from a Stream directly to any type and back. Depends only on stdlib.

• UpdatedOct 25, 2024
• Nim