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SPECIFICTION
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Prompt Fuzzer

prompt.security

WindowsmacOSLinuxSelf-hosted
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Spec score 7.1 #20 of 27 in AI Red Teaming Tools

Spec sheet

Purpose
Prompt Fuzzer tests and hardens the system prompts of AI applications against vulnerabilities.Read 5 Oct 2026 · prompt.security
Intended users
The page presents the tool for developers of AI applications seeking to evaluate and improve prompt resilience and safety.Read 5 Oct 2026 · prompt.security
Access
The maker directs users to GitHub to get the tool; the page does not state specific operating system support or integrations.Read 5 Oct 2026 · prompt.security
Approach
The maker says the tool focuses on prompt-based systems and their target program interactions, unlike symbolic execution methods that analyze code paths.Read 5 Oct 2026 · prompt.security
Attack coverage
The repository lists 16 attack types, including jailbreak, prompt injection, RAG poisoning, and system prompt extraction.Read 5 Oct 2026 · github.com
Attack testing
The fuzzing process uses dynamic LLM-based attacks.Read 5 Oct 2026 · prompt.security
Community contributions
The maker invites the community to contribute additional attack tests through the GitHub repository.Read 5 Oct 2026 · github.com
Custom endpoints
The tool supports custom and self-hosted LLM endpoints, including Ollama and OpenAI-compatible endpoints.Read 5 Oct 2026 · github.com
Fuzzing engine
The fuzzer generates diverse test scenarios and uses variations of malicious prompts as fuzz targets for an AI system.Read 5 Oct 2026 · prompt.security
Installation
The repository instructs users to install the tool with pip and requires Python 3.10 or newer.Read 5 Oct 2026 · github.com
Interactive playground
The maker says users can iterate on system prompt settings in a chat-format Playground, with each iteration representing a fuzzing campaign.Read 5 Oct 2026 · prompt.security
LLM providers
The repository lists support for 16 LLM providers, including OpenAI, Anthropic, Azure OpenAI, Cohere, Google PaLM, and Ollama.Read 5 Oct 2026 · github.com
Open source
The maker describes Prompt Fuzzer as an open-source fuzzing tool and directs users to get it from GitHub.Read 5 Oct 2026 · prompt.security
Playground
The Playground lets users iterate settings in a chat format, with each iteration representing a new fuzzing campaign.Read 5 Oct 2026 · prompt.security
RAG testing requirement
RAG tests require an embedding provider and embedding model; the repository says ChromaDB is installed by default with the package.Read 5 Oct 2026 · github.com
Target users
The maker presents the tool for developers building AI applications who want to assess and improve system prompt resilience.Read 5 Oct 2026 · prompt.security
Testing modes
It supports interactive chat mode, command-line mode, and multithreaded testing.Read 5 Oct 2026 · github.com
Token usage
The maker warns that using Prompt Fuzzer consumes tokens.Read 5 Oct 2026 · github.com

Where Specifiction places it

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