google/flatbuffers

Health v2 · maintenance only

Adoption not part of the score

26411 stars · 3633 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

FlatBuffers is Google's cross-platform, memory-efficient serialization library that stores data in a binary format you can read directly without a parsing or unpacking step. It ships a schema compiler (flatc) that generates accessors and builders for many languages, including C++, Java, C#, Go, Python, Rust, and JavaScript, with forwards/backwards schema compatibility.

Use cases

• serialize data efficiently across multiple programming languages
• read serialized data with zero-copy, no parsing or unpacking
• fast binary serialization for games and performance-critical apps
• evolve a data schema while keeping backwards and forwards compatibility
• replace protocol buffers or JSON with a faster binary format
• convert JSON into a compact binary representation
• access large serialized files via memory-mapped buffers on mobile or embedded devices

When to choose

• you need maximum memory efficiency and speed in serialization hot paths
• you must exchange structured data between different languages or schema versions
• you target game development, Android, or embedded systems where footprint and allocation matter
• you want to read buffers directly without per-object heap allocations

When to avoid

• you need human-readable output or easy ad-hoc introspection, where JSON is a better fit
• your data is fully dynamic with no schema known ahead of time
• you rely on the broad RPC and tooling ecosystem of protocol buffers
• you want a trivial setup for small configs where JSON or YAML suffices

Facets

library · maturity stable

serialization compiler parser developer-tools mobile-development embedded-systems performance cross-platform cpp c rust go python jvm dotnet embedded zero-copy schema-compiler flatc code-generation binary-format schema-evolution grpc protobuf-alternative mmap memory-efficiency json-conversion game-development android ios

Member repositories

For agents

markdown · JSON · MCP: product_card(name="google/flatbuffers")