Browser-based tool for optimizing, testing and comparing LLM prompts with your own model API keys
- Deploy
- One-click
- License
- AGPL-3.0-only
- GitHub stars
- 36.7k stars
- Last commit
Self-hosted alternatives to PromptPerfect
PromptPerfect is a prompt optimization tool from Jina AI whose site says it will no longer be available after September 1, 2026. One listed app does its main job and runs in your own Cloudflare account.
Each answer comes from the app’s README and source code, compared with the features PromptPerfect describes on its own site.
PromptPerfect features, app by app
| Feature | Prompt Optimizer |
|---|---|
| Automatic prompt optimization for any model | Yes |
| Prompt generation | Partly |
| Image prompt optimization and image creation | Yes |
| Chat assistant for drafting prompts and content | Partly |
| Model comparison on one prompt | Partly |
| Prompts deployed as REST API services | No |
| Agent simulation | No |
Browser-based tool for optimizing, testing and comparing LLM prompts with your own model API keys
- What a PromptPerfect user would miss
- Prompts deployed as REST API services, agent simulation and a hosted account; the Cloudflare build is a static site that needs your own model API keys and has no password page.
- What it adds
- AGPL-3.0, keeps prompts and favorites in browser storage with model requests going straight to the provider, saves favorites with version history, and also ships as a desktop app, a Chrome extension and a Docker image.
- Yes Automatic prompt optimization for any model. One-click optimization with multi-round improvement, system and user prompt modes, and model providers such as OpenAI, Gemini, DeepSeek, Grok, Zhipu AI, SiliconFlow and MiniMax.
- Partly Prompt generation. Prompts start from manual writing, templates, imports or Prompt Garden, and short ideas are expanded in image mode; it improves an existing prompt more than it generates one from nothing.
- Yes Image prompt optimization and image creation. Image mode with text-to-image, image-to-image and multi-image generation using Gemini, Seedream and Grok, plus image prompt optimization.
- Partly Chat assistant for drafting prompts and content. Advanced testing mode runs multi-turn conversation tests with variables and function calling; it is not a general chat assistant.
- Partly Model comparison on one prompt. Compare mode shows two results with selectable prompt versions and models, plus compare evaluation.
- No Prompts deployed as REST API services. The Cloudflare build is a static site with no server code, and the MCP server ships only with the Docker image.
- No Agent simulation. No agent simulation found.
Sources:github.com/linshenkx/prompt-optimizeralways200.comdocs.always200.compromptperfect.jina.ai/