gofuzz

gofuzz is a lightweight fuzzing utility for Go that rapidly generates randomized, edge-case-heavy inputs to populate structs, maps, slices, and scalar fields. It’s engineered to make property tests productive by automatically traversing nested types and supplying varied values, including zero values, extremes, and random strings or byte sequences. Because it respects Go’s type system, it can generate valid shapes for complex generic or composite types with very little setup. Users can register custom functions to influence how certain fields are constructed, which is useful for domains with strict invariants. The library’s determinism controls allow reproducible failures while still offering diverse coverage across runs. Teams reach for gofuzz to smoke out serialization bugs, panics in equality or hashing, and brittle assumptions in business logic.