# rkyv/rkyv

Zero-copy deserialization framework for Rust

Repository: https://github.com/rkyv/rkyv
Canonical: https://ross.abutalabs.com/products/rkyv
Homepage: https://rkyv.org
Language: Rust
License: MIT
License Family: permissive
Topics: rust, serialization, zero-copy
Last push: 2026-08-24T14:45:24+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 40, longevity 100
- inputs: {"age_days": 2127, "days_push": 9, "days_rel": 714, "gap_med": 0.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4330, forks 236 (observed 2026-08-28T04:08:45.966546+00:00)

## What it is
rkyv is a zero-copy deserialization framework for Rust that serializes data into an archived format that can be accessed directly in-place without deserialization. It provides safe, validated access to archived data and derives Archive/Serialize/Deserialize implementations for Rust types.

## Use cases
- serialize rust structs to bytes with zero-copy access
- load large serialized datasets without deserialization overhead
- fast serialization for games and high-performance applications
- no_std embedded serialization
- compare rust serialization solutions for benchmarks

## When to choose
- you need extremely fast deserialization or in-place access to serialized data
- you're working in Rust and want derive-based serialization
- you need no_std support or minimal resource usage

## When to avoid
- you need cross-language serialization interop like JSON or protobuf
- your data is small and serialization speed is not a bottleneck
- you need human-readable formats

## Facets
- artifact type: library
- maturity: stable
- function: serialization
- domain: developer-tools, performance, files
- platform: rust, cross-platform
- tags: zero-copy, no-std, archive, deserialization

## Member repositories
- rkyv/rkyv (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:45.966546+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:21:40.900889+00:00, confidence not recorded.
  - readme: https://github.com/rkyv/rkyv (fetched 2026-08-28T04:08:45.966546+00:00, sha 1fa69e3b1d90)
  - homepage: https://rkyv.org (fetched 2026-08-29T09:10:38.049090+00:00, sha b72cd7187001)
  - registry_crates: https://crates.io/api/v1/crates/rkyv (fetched 2026-08-29T09:10:38.052728+00:00, sha 037cbc04ba21)
- Data as of 2026-08-30T08:39:29.467469+00:00.