11 releases (7 stable)
| 25.12.19 | Dec 19, 2025 |
|---|---|
| 25.9.23 | Sep 24, 2025 |
| 25.2.10 | Feb 11, 2025 |
| 24.12.23 | Dec 23, 2024 |
| 0.1.1 | Jun 29, 2020 |
#1615 in Encoding
42,056 downloads per month
Used in 78 crates
(35 directly)
125KB
2.5K
SLoC
Flexbuffers
Flexbuffers is a schema-less binary format developed at Google. FlexBuffers can be accessed without parsing, copying, or allocation. This is a huge win for efficiency, memory friendly-ness, and allows for unique use cases such as mmap-ing large amounts of free-form data.
FlexBuffers' design and implementation allows for a very compact encoding, with automatic sizing of containers to their smallest possible representation (8/16/32/64 bits). Many values and offsets can be encoded in just 8 bits.
FlexBuffers supports Serde for automatically serializing Rust data structures into its binary format.
See Examples for Usage:
Flexbuffers is the schema-less cousin of Flatbuffers.
Dependencies
~0.5–1.2MB
~26K SLoC