explaingit

linshenkx/prompt-optimizer

Analysis updated 2026-06-20

28,233TypeScriptAudience · vibe coderComplexity · 2/5Setup · easy

TLDR

Prompt Optimizer rewrites your AI prompts through multiple iterations to make them clearer and more effective. Paste a prompt in, get an optimized version back, and compare results side by side.

Mindmap

mindmap
  root((Prompt Optimizer))
    What it does
      Multi-round prompt rewriting
      Side-by-side evaluation
      Version history
      Image prompt support
    Tech Stack
      TypeScript
      Docker
      Chrome extension
    Use Cases
      Better AI outputs
      Prompt A/B testing
      Image generation tuning
    Audience
      Vibe coders
      AI builders
      Prompt engineers
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Code map

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What do people build with it?

USE CASE 1

Paste a vague ChatGPT or Claude prompt and get an optimized version that produces more accurate, directive results.

USE CASE 2

Test two versions of a prompt side by side to measure which produces better AI outputs before using it in production.

USE CASE 3

Optimize image-generation prompts for text-to-image models to get more consistent visual results.

What is it built with?

TypeScriptDocker

How does it compare?

linshenkx/prompt-optimizernextauthjs/next-authmobxjs/mobx
Stars28,23328,22428,183
LanguageTypeScriptTypeScriptTypeScript
Setup difficultyeasymoderateeasy
Complexity2/53/52/5
Audiencevibe coderdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

Requires your own API key for whichever AI provider you connect, all processing happens in your browser.

In plain English

Prompt Optimizer is a tool for rewriting AI prompts so they produce better results. Instead of staring at a one-line instruction and guessing why the model ignored half of it, you paste your prompt in, click optimize, and the tool runs multi-round iterative rewrites that try to make the instruction clearer and more directive. It can optimize both the system prompt that sets up the AI's role and the user prompt that asks a specific question. The project supports several ways to use it: a web app, a desktop app, a Chrome extension, and Docker deployment. You can bring prompts in from scratch, from templates, from local files, or from a separate library called Prompt Garden, and save the ones that work as reusable favorites with version history, examples, and a record of where they came from. An evaluation pipeline lets you analyze a single output or compare results side by side so you can tell whether a rewrite actually improved things, and an advanced testing mode adds context variables, multi-turn conversation tests, and Function Calling integration. An image generation mode also handles text-to-image, image-to-image, and multi-image prompts. You would use it when you spend time hand-tuning prompts and want a structured environment to draft, test, and refine them. It plugs into mainstream AI models including OpenAI, Gemini, DeepSeek, Zhipu AI, SiliconFlow, and MiniMax. Built in TypeScript, processing happens in your own browser and talks to the AI provider directly without going through an intermediate server, and it supports the Model Context Protocol (MCP) for integration with apps like Claude Desktop.

Copy-paste prompts

Prompt 1
I have a vague system prompt for my chatbot. Use Prompt Optimizer's multi-round rewrite feature to make it more directive and structured.
Prompt 2
How do I use Prompt Optimizer's evaluation pipeline to compare two versions of a prompt and decide which one produces better outputs?
Prompt 3
How do I run Prompt Optimizer locally with Docker and connect it to my own OpenAI API key?
Prompt 4
I want to optimize a DeepSeek prompt that generates marketing copy. Show me how to use Prompt Optimizer's iterative rewrite feature step by step.

Frequently asked questions

What is prompt-optimizer?

Prompt Optimizer rewrites your AI prompts through multiple iterations to make them clearer and more effective. Paste a prompt in, get an optimized version back, and compare results side by side.

What language is prompt-optimizer written in?

Mainly TypeScript. The stack also includes TypeScript, Docker.

How hard is prompt-optimizer to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is prompt-optimizer for?

Mainly vibe coder.

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