# Cap'n Proto

> Cap'n Proto is an insanely fast data interchange format and capability-based RPC system.

Cap'n Proto is an insanely fast data interchange format and capability-based <RPC> system.

> Think <JSON>, except binary. Or think [Protocol Buffers](https://wiki.g15e.com/pages/Protocol%20Buffers.txt), except faster. In fact, in benchmarks, Cap'n Proto is INFINITY TIMES faster than Protocol Buffers.