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Tech riderRev. 29 Sept 2026

Jazzer

Ch 067.2of 27 Fuzz Testing Software
  1. 1Runs onLinux, Mac, Windows
  2. 2CostsFree plan
  3. 3Input generation methodsmutation, generation
  4. 4Target typesJVM applications, Java, Kotlin, Scala, Clojure, JNI/native libraries
  5. 5Coverage guidanceYes
  6. 6Crash triageYes
  7. 7Execution modelocal
  8. 8Supported languagesJava, Kotlin, Scala, Clojure
8 lines stated Written from the maker's own pages: github.com
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Overview

Jazzer is ranked #6 of 27 in fuzz testing software on Specifiction. It runs on Linux, macOS, Windows. There is a free plan.

Jazzer plans and pricing

All plans
Jazzer Free Coverage-guided, in-process fuzzing for the JVM · Linux x86_64 and arm64, macOS 12+ x86_64 and arm64, Windows x86_64 github.com · 29 Sept 2026

Compared on fuzz testing software

Free plan
Yesgithub.com
Input generation methods
mutation, generationgithub.com
Target types
JVM applications, Java, Kotlin, Scala, Clojure, JNI/native librariesgithub.com
Coverage guidance
Yesgithub.com
Crash triage
Yesgithub.com
Execution mode
localgithub.com
Supported languages
Java, Kotlin, Scala, Clojuregithub.com
CI/CD support
Yesgithub.com

Facts

Purpose
Jazzer is a coverage-guided, in-process fuzzer for the JVM based on libFuzzer.github.com · 29 Sept 2026
JUnit integration
Jazzer integrates with JUnit 5.9.0 or newer, allowing fuzz tests alongside regular unit tests.github.com · 29 Sept 2026
Build tools
The README documents use with Maven, Gradle, and Bazel, including support through rules_fuzzing.github.com · 29 Sept 2026
Input generation
The @FuzzTest annotation lets Jazzer automatically generate and mutate method parameter inputs, including primitives, strings, arrays, and standard library classes.github.com · 29 Sept 2026
Run modes
JUnit fuzz tests can run in regression mode using saved crashing inputs or fuzzing mode to generate and mutate inputs for new coverage.github.com · 29 Sept 2026
Standalone use
Jazzer can run standalone as a binary downloaded from GitHub release archives or through its Java main class.github.com · 29 Sept 2026
Bug detectors
Built-in sanitizers detect Java security issues including SSRF, file path traversal, and OS command injection, and provide feedback to guide fuzzing.github.com · 29 Sept 2026
Sanitizer configuration
The README says SSRF and file path traversal sanitizers can be configured at runtime through BugDetectorsAPI.github.com · 29 Sept 2026
OSS-Fuzz
Code Intelligence and Google have brought support for Java, Kotlin, and other JVM languages to Google's OSS-Fuzz project.github.com · 29 Sept 2026
Distribution
The jazzer-junit package is available on Maven Central and the README says it is signed with a published key.github.com · 29 Sept 2026
License
The GitHub repository identifies Jazzer as licensed under Apache-2.0.github.com · 29 Sept 2026
Platform support
The README lists Linux x86_64 and arm64, macOS 12+ x86_64 and arm64, and Windows x86_64 as supported platforms.github.com · 29 Sept 2026

Company

Headquarters
Bonn, Germanygithub.com · 28 Sept 2026

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Where it ranks on Specifiction

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