Crate features / rkyv
Feature flags · rkyv 0.8.18 · from crates.io 2026-10-24
rkyv features: what each one does, and the line to copy
Short answerrkyv 0.8.18 has 14 features. By default it turns on std, bytecheck; add default-features = false to start from nothing. It needs Rust 1.81 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
aligned | nothing else (a switch the code checks) | |
alloc | dep:hashbrown, tinyvec-1?/alloc, rancor/alloc | |
big_endian | nothing else (a switch the code checks) | |
bytecheck | yes | dep:bytecheck, rend/bytecheck, rkyv_derive/bytecheck |
hashbrown-0_17 | dep:hashbrown | |
indexmap-2 | dep:indexmap-2, alloc | |
little_endian | nothing else (a switch the code checks) | |
pointer_width_16 | nothing else (a switch the code checks) | |
pointer_width_32 | nothing else (a switch the code checks) | |
pointer_width_64 | nothing else (a switch the code checks) | |
std | yes | alloc, bytes-1?/std, indexmap-2?/std, ptr_meta/std, uuid-1?/std |
triomphe-0_1 | dep:triomphe-0_1, alloc | |
unaligned | nothing else (a switch the code checks) | |
uuid-1 | dep:uuid-1, bytecheck?/uuid-1 |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version rkyv declares (rust-version), and the release that changed it:
- 0.8.0-rc.2 (2024-09-09): Rust 1.81
- 0.7.46 (2026-01-06): no rust-version declared
- 0.8.14 (2026-01-13): Rust 1.81
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p rkyv --precise <version>, or use resolver 3, which picks compatible versions for you.
More on rkyv
Real downloads, dependents and alternatives: rkyv crate data (513.5K real downloads a day, 797 dependents).
Security record: rkyv advisories.
docs.rs feature list · crates.io · license MIT · edition 2021
Up next
Before you depend on itrkyv crate dataReal downloads, dependents, alternatives.Read it next →Did this answer your question?