cargo-fuzz

7.4easy start · #2 of 27
in Fuzz Testing Software

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

cargo-fuzz is ranked #2 of 27 in fuzz testing software on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

cargo-fuzz plans and pricing

All plans

cargo-fuzz Free MIT license · Apache License (Version 2.0) github.com · 2 Oct 2026

Compared on fuzz testing software

Input generation methods: mutation, generation, hybrid
Target types: raw byte buffers, structured Rust data, libraries, APIs, compiler code, allocator operations
Coverage guidance: Yes
Crash triage: Yes
Execution mode: local
Supported languages: Rust
CI/CD support: Yes

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The record

Purpose: cargo-fuzz is a cargo subcommand for fuzzing with libFuzzer.
Recommended use: The Rust Fuzz Book calls cargo-fuzz the recommended tool for fuzz testing Rust code.
Fuzzer support: cargo-fuzz invokes a fuzzer rather than being a fuzzer itself, and currently supports libFuzzer through the libfuzzer-sys crate.
Installation: The documented installation command is `cargo install cargo-fuzz`.
Compiler requirement: The project requires the nightly Rust compiler because it uses the `-Z` compiler flag for address sanitization.
Build requirement: A C++ compiler with C++11 support is required.
Supported systems: The setup documentation lists x86-64 Linux, x86-64 macOS, Apple-Silicon macOS, and Windows with LLVM sanitizer support.
Project setup: `cargo fuzz init` creates fuzzing files for a crate, and `cargo fuzz add <target>` creates a new fuzzing target.
Fuzz execution: `cargo fuzz run <target>` runs a fuzzing target to find bugs.
Input minimization: The tool provides `cargo fuzz tmin` to minimize a failing input and `cargo fuzz cmin` to minimize a corpus of input files.
Coverage: `cargo fuzz coverage` generates source-based code coverage information and requires cargo-fuzz version 0.10.0 or newer.
CI integration: The documentation provides a GitHub Actions workflow that installs cargo-fuzz, builds targets, runs them for a configured time, and uploads artifacts on failure.
Windows integration: cargo-fuzz can fuzz Windows programs using MSVC AddressSanitizer.
Licensing: cargo-fuzz is distributed under both the MIT license and Apache License Version 2.0.
Price from: Free

Where it ranks on The Geeks Club

Best Fuzz Testing Software in 2026#2 of 27

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Sources

github.com/rust-fuzz/cargo-fuzz· checked 1 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz.html· checked 1 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz/setup.html· checked 1 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz/coverage.html· checked 1 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz/ci.html· checked 1 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz/windows.html· checked 1 Oct 2026
github.com/rust-fuzz/cargo-fuzz/blob/main/Cargo.to· checked 1 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz/structure-aware-fuzzing· checked 2 Oct 2026
rust-fuzz.github.io/book/cargo-fuzz/guide.html· checked 2 Oct 2026
github.com/rust-fuzz/cargo-fuzz/security· checked 2 Oct 2026