Best Open Source serialization Libraries

A curated list of the most popular GitHub repositories tagged with serialization. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1protocolbuffers/protobuf

Protocol Buffers - Google's data interchange format

70,700C++

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#2alibaba/fastjson

FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.

25,721Java

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#3google/flatbuffers

FlatBuffers: Memory Efficient Serialization Library

25,564C++

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#4toon-format/toon

🎒 Token-Oriented Object Notation (TOON) – Compact, human-readable, schema-aware JSON for LLM prompts. Spec, benchmarks, TypeScript SDK.

22,745TypeScript

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#5marcuswestin/store.js

Cross-browser storage for all use cases, used across the web.

14,012JavaScript

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#6json-iterator/go

A high-performance 100% compatible drop-in replacement of "encoding/json"

13,931Go

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#7frohoff/ysoserial

A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.

8,751Java

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#8MessagePack-CSharp/MessagePack-CSharp

Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]

6,607C#

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