PyPI · crates.io · Maven +198Exceptionalhealth index

apache/foryA blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.
Java · Python★ 4,519↓ 4,472/moAug 28, 2026
Packagist · RubyGems · Maven +197Exceptionalhealth index
C++ · C# · C★ 71.7K↓ 6.7M/moAug 4, 2026
Packagist · Go · Maven +196Exceptionalhealth index
Java · C#★ 3,289↓ 18.6K/moJul 23, 2026
crates.io96Exceptionalhealth index
Rust★ 129↓ 1.3M/moAug 12, 2026
PyPI96Exceptionalhealth index

google/orbaxOrbax provides common checkpointing and persistence utilities for JAX users
Python★ 534↓ 5.9M/moAug 29, 2026
PyPI · npm96Exceptionalhealth index
Python★ 7,240↓ 120M/moAug 4, 2026
npm96Exceptionalhealth index

medplum/medplumMedplum is a healthcare platform that helps you quickly develop high-quality compliant applications.
TypeScript · MDX★ 2,592↓ 888.5K/moAug 5, 2026
NuGet94Exceptionalhealth index
C#★ 931Aug 5, 2026
Go94Exceptionalhealth index
fxamacker/cborCBOR codec (RFC 8949, RFC 8742) with CBOR tags, Go struct tag options (toarray, keyasint, omitempty, omitzero), float64/32/16, big.Int, and fuzz tested.
Go★ 1,072Jul 28, 2026
npm94Exceptionalhealth index
inikulin/parse5HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
TypeScript★ 3,918↓ 802M/moAug 4, 2026
crates.io94Exceptionalhealth index

jonasbb/serde_withThis crate provides custom de/serialization helpers to use in combination with serde's `with`-annotation and with the improved `serde_as`-annotation.
Rust★ 855↓ 47.6M/moAug 8, 2026
PyPI · crates.io93Exceptionalhealth index
Rust · Python★ 302↓ 73.6M/moAug 4, 2026
Maven93Exceptionalhealth index
Java★ 4,397Aug 28, 2026
crates.io93Exceptionalhealth index

facet-rs/facetRust reflection, serialization, deserialization, pretty printing, etc. — the last proc macro you should need
Rust★ 2,566↓ 261.3K/moAug 20, 2026
PyPI · crates.io · npm +193Exceptionalhealth index

foxglove/mcapMCAP is a modular, performant, and serialization-agnostic container file format, useful for pub/sub and robotics applications.
Rust · Python · TypeScript★ 1,047↓ 3M/moAug 19, 2026
crates.io92Excellenthealth index

anthropics/buffaRust implementation of protobuf with editions support, JSON serialization, and zero-copy views
Rust★ 871↓ 4.1M/moAug 27, 2026
Packagist92Excellenthealth index
PHP★ 129↓ 483K/moJul 25, 2026
NuGet91Excellenthealth index

udndc/X.PagedListLibrary for easily paging through any IEnumerable/IQueryable in ASP.NET
C#★ 926Sep 6, 2026
PyPI90Excellenthealth index
jsonpickle/jsonpicklePython library for serializing any arbitrary object graph into JSON. It can take almost any Python object and turn the object into JSON. Additionally, it can reconstitute the object back into Python.
Python★ 1,317Jul 22, 2026
PyPI90Excellenthealth index
Python★ 1,045Jul 18, 2026
crates.io90Excellenthealth index

tokio-rs/prostPROST! a Protocol Buffers implementation for the Rust Language
Rust★ 4,738↓ 105M/moAug 8, 2026
crates.io89Excellenthealth index
Rust★ 884↓ 36.3M/moAug 13, 2026
crates.io89Excellenthealth index

sebastienrousseau/noyalibPure-Rust YAML 1.2 ecosystem: zero unsafe, 100% spec compliance (406/406 official suite), streaming-first serde, lossless CST, JSON-Schema validation. Library + CLI (noyafmt, noyavalidate) + LSP + MCP + WASM bindings.
Rust★ 9↓ 88K/moAug 22, 2026
crates.io88Excellenthealth index

cloudwego/pilotaA thrift and protobuf implementation in pure rust with high performance and extensibility.
Rust★ 167↓ 59.7K/moSep 5, 2026
PyPI · npm88Excellenthealth index

frenck/probatio⚖️ Probatio. A modern, maintained data validation library for Python. Clean-room, MIT-licensed, drop-in reimplementation of voluptuous.
Python★ 14↓ 8,911/moAug 29, 2026
PyPI88Excellenthealth index

msgspec/msgspecA fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML
Python · C★ 4,063Aug 27, 2026
crates.io88Excellenthealth index

near/borsh-rsRust implementation of Binary Object Representation Serializer for Hashing
Rust★ 430↓ 25.8M/moAug 27, 2026
npm88Excellenthealth index

protobufjs/protobuf.jsProtocol Buffers for JavaScript and TypeScript. Very fast, fully conformant through Edition 2024, and unusually versatile. No protoc required.
JavaScript★ 10.6K↓ 312M/moAug 12, 2026
crates.io88Excellenthealth index
Rust★ 5,612↓ 86.4M/moAug 4, 2026
stephenberry/glazeExtremely fast, in memory, serialization, reflection, and RPC library for C++. JSON, BEVE, BSON, CBOR, CSV, JSONB, MessagePack, TOML, YAML, EETF
C++★ 2,912Jul 22, 2026