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Repositories in this selection 27 · UTC 2026-11-04
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1—Pprotocolbuffers / protobufProtocol Buffers - Google's data interchange formatC++NOASSERTION · Restricted / unknownInsufficient rank history72,15016,361——2026-11-03
2—Ggoogle / flatbuffersFlatBuffers: Memory Efficient Serialization LibraryC++Apache-2.0 · PermissiveInsufficient rank history26,6073,719——2026-10-29
3—Ttoon-format / toon🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.TypeScriptMIT · PermissiveInsufficient rank history25,6031,126——2026-11-01
4—Mmarcuswestin / store.jsCross-browser storage for all use cases, used across the web.JavaScriptMIT · PermissiveInsufficient rank history13,9721,294——2024-01-16
5—Ffrohoff / ysoserialA proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.JavaMIT · PermissiveInsufficient rank history9,0961,852——2025-12-04
6—Iijl / orjsonFast, correct Python JSON library supporting dataclasses, datetimes, and numpyPythonApache-2.0 · PermissiveInsufficient rank history8,284343——2026-10-07
7—Mmarshmallow-code / marshmallowA lightweight library for converting complex objects to and from simple Python datatypes.PythonMIT · PermissiveInsufficient rank history7,245779——2026-11-03
8—MMessagePack-CSharp / MessagePack-CSharpExtremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]C#NOASSERTION · Restricted / unknownInsufficient rank history6,811779——2026-11-02
9—EEsotericSoftware / kryoJava binary serialization and cloning: fast, efficient, automaticHTMLBSD-3-Clause · PermissiveInsufficient rank history6,548848——2026-11-02
10—NNeargye / magic_enumStatic reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate codeC++MIT · PermissiveInsufficient rank history6,248574——2026-11-02
11—KKotlin / kotlinx.serializationKotlin multiplatform / multi-format serializationKotlinApache-2.0 · PermissiveInsufficient rank history5,949690——2026-10-30
12—UUSCiLab / cerealA C++11 library for serializationC++BSD-3-Clause · PermissiveInsufficient rank history4,712843——2026-03-11
13—Aapache / foryA blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.JavaApache-2.0 · PermissiveInsufficient rank history4,578470——2026-11-02
14—Aalibaba / fastjson2🚄 FASTJSON2 is a Java JSON library with excellent performance.JavaApache-2.0 · PermissiveInsufficient rank history4,433623——2026-10-30
15—Rrkyv / rkyvZero-copy deserialization framework for RustRustMIT · PermissiveInsufficient rank history4,397240——2026-09-25
16—Aalibaba / HandyJSONA handy swift json-object serialization/deserialization librarySwiftNOASSERTION · Restricted / unknownInsufficient rank history4,256675——2024-03-08
17—Mmsgspec / msgspecA fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOMLPythonBSD-3-Clause · PermissiveInsufficient rank history4,206229——2026-10-28
18—Rron-rs / ronRusty Object NotationRustApache-2.0 · PermissiveInsufficient rank history4,057168——2026-11-03
19—Iinikulin / parse5HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.TypeScriptMIT · PermissiveInsufficient rank history3,939265——2026-11-03
20—Iibireme / yyjsonAuthor description: The fastest JSON library in CCMIT · PermissiveInsufficient rank history3,935360——2026-10-30
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