# Flexbuffers [Flexbuffers](https://google.github.io/flatbuffers/flexbuffers.html) 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 is the schema-less cousin of [Flatbuffers](https://google.github.io/flatbuffers/).