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Top 20 Java Serialization Projects
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ysoserial
A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.
Project mention: Gadget chains in Java: how unsafe deserialization leads to RCE? | dev.to | 2025-10-10The problem with exploiting native Java serialization weaknesses is not new. Various enthusiasts have compiled a set of "useful payloads" that exploit gadget chains within various popular libraries (in certain versions) and created the ysoserial utility, which generates such objects in a serialized form. It's super handy for getting familiar with a topic and for testing whether an application is vulnerable—of course, with the author's permission; exploiting such things without the creator's consent is illegal and unethical.
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AppSignal
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fory
A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.
Project mention: Apache Fory JSON: Fastest Java JSON Serialization, 10x Faster Than Jackson/Gson | news.ycombinator.com | 2026-08-12 -
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jsoniter
jsoniter (json-iterator) is fast and flexible JSON parser available in Java and Go (by json-iterator)
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Kargo
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night-config
Powerful java configuration library for toml, yaml, hocon, json and in-memory configurations. Serialization/deserialization framework.
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snackjson
Sanck4: Next-generation high-performance Jsonpath framework. Compatible with 'jayway.jsonpath' and IETF JSONPath (RFC 9535) standard specifications (open customization support).
Snack4 is a high-performance Java JSON library designed for demanding scenarios. Its core component JsonReader uses a non-recursive state machine architecture, natively supporting Streaming Parse and Auto-Repair, making it ideal for handling unstable LLM outputs and large NDJSON files.
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kafka-large-message-serde
A Kafka Serde that reads and writes records from and to Blob storage (S3, Azure, Google) transparently.
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Project mention: Show HN: Fory C++ Serialization – Polymorphism, Circular Refs, 12x vs. Protobuf | news.ycombinator.com | 2026-02-18
6. Row format. O(1) random field access by index — useful for analytics workloads where you only read a few fields per record.
Throughput vs. Protobuf: up to 12x depending on workload.
GitHub: https://github.com/apache/fory
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NetworkParser
Framework for serialization to Json, XML, Byte and Excel, therefore an oviparous wool milk sow J
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Ziphra Messenger Common
Ziphra Messenger Common ziphra-common: Contains reusable classes shared between client and server, such as cryptographic primitives, protocol constants, and utilities. For projects: Ziphra Messenger Client & Ziphra Messenger Server
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java Serialization discussion
Java Serialization related posts
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Apache Fory JSON: Fastest Java JSON Serialization, 10x Faster Than Jackson/Gson
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Apache Fory Serialization 1.2.0: JDK 25 support without sun.misc.Unsafe
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Extend Protobuf/FlatBuffers Schema IDL with Shared/Circular Reference Support
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Show HN: First IDL for Object-Graph Serialization (Apache Fory IDL)
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"Giving up upstream-ing my patches & feel free to pick them up"
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Apache Fory – fast serialization powered by JIT and zero-copy
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Apache Fory Serialization Framework 0.11.2 Released
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A note from our sponsor - Kargo
akuity.io | 5 Sep 2026
Index
What are some of the best open-source Serialization projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | ysoserial | 9,044 |
| 2 | fory | 4,521 |
| 3 | fastjson2 | 4,399 |
| 4 | protostuff | 2,096 |
| 5 | zfoo | 2,013 |
| 6 | FST | 1,594 |
| 7 | jsoniter | 1,567 |
| 8 | MessagePack | 1,474 |
| 9 | colfer | 759 |
| 10 | night-config | 287 |
| 11 | snackjson | 173 |
| 12 | zserio | 153 |
| 13 | juneau | 96 |
| 14 | kafka-large-message-serde | 67 |
| 15 | kdl4j | 55 |
| 16 | opack | 31 |
| 17 | fory-benchmarks | 7 |
| 18 | NetworkParser | 6 |
| 19 | bencoder4j | 3 |
| 20 | Ziphra Messenger Common | 0 |
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