PyPI · npm96Exceptionalhealth index
Python★ 7,240↓ 120M/moAug 4, 2026
crates.io95Exceptionalhealth index
copper-project/copper-rsCopper is an operating system for robots - build, run, and replay your entire robot deterministically.
Rust★ 1,422↓ 24.1K/moJul 24, 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
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
crates.io89Excellenthealth index

gungraun/gungraunHigh-precision, one-shot and consistent benchmarking framework/harness for Rust. All Valgrind tools at your fingertips.
Rust · Roff★ 317↓ 412.5K/moAug 22, 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
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
Rust★ 5,612↓ 86.4M/moAug 4, 2026
crates.io87Excellenthealth index
Rust★ 3,991↓ 7.5M/moAug 13, 2026
crates.io87Excellenthealth index

tafia/calamineA pure Rust Excel/OpenDocument SpreadSheets file reader: rust on metal sheets
Rust★ 2,413↓ 1.3M/moSep 5, 2026
PyPI86Excellenthealth index
Python★ 935↓ 37M/moAug 27, 2026
crates.io86Excellenthealth index
Rust★ 172↓ 35.7K/moJul 30, 2026
crates.io86Excellenthealth index
bourumir-wyngs/serde-saphyrA strongly typed, comment-supporting YAML deserializer that deserializes YAML directly into your Rust types without constructing an intermediate tree of “abstract values.”
Rust★ 205↓ 757.2K/moJul 19, 2026
crates.io86Excellenthealth index
Rust★ 182↓ 702.2K/moAug 12, 2026
crates.io84Excellenthealth index
Rust★ 68↓ 2M/moAug 27, 2026
crates.io84Excellenthealth index
emanuele-em/proxelarScriptable local traffic workbench for inspecting, intercepting, replaying, and rewriting HTTP/HTTPS and WebSocket traffic.
Rust★ 1,011↓ 277/moJul 27, 2026
npm83Excellenthealth index
TypeScript★ 97↓ 4M/moAug 27, 2026
crates.io · RubyGems80Excellenthealth index
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crates.io80Excellenthealth index
Rust★ 29↓ 79.1K/moAug 5, 2026
crates.io78Goodhealth index

dtolnay/miniserdeData structure serialization library with several opposite design goals from Serde
Rust★ 936↓ 1.5M/moAug 27, 2026
crates.io78Goodhealth index
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crates.io78Goodhealth index
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crates.io77Goodhealth index
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crates.io77Goodhealth index
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crates.io75Goodhealth index
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crates.io75Goodhealth index
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crates.io73Goodhealth index
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crates.io · npm73Goodhealth index
gpu-cli/openapi-to-rustOpenAPI generator for Rust: typed models, async Reqwest/SSE clients, and Axum server scaffolding for OpenAPI 3.0/3.1.
Rust★ 21↓ 2,235/moJul 23, 2026
crates.io73Goodhealth index
Rust★ 243↓ 4M/moAug 8, 2026
crates.io73Goodhealth index
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