# Prompt Optimizer

Product · https://godooo.ai/en/product/prompt-optimizer

> Prompt Optimizer is an open-source AI app, launched in 2025, made for developers and people who don't write code.

A tool for rewriting, testing and comparing prompts, on the web, desktop or as a browser extension.

Main jobs: Prompt optimization. It is open source and free to use. You can use it in the browser, as a desktop app, as a browser extension and on your own server.

## At a glance

- **Type:** [Product](https://godooo.ai/en/browse#product)
- **Launched:** 2025
- **Galaxy:** [Writing & Work](https://godooo.ai/en/galaxy/writing)
- **Pricing:** Open source, free
- **Open source:** Yes
- **Source code:** [github.com/linshenkx/prompt-optimizer](https://github.com/linshenkx/prompt-optimizer)
- **GitHub stars:** 35,590
- **How you run it:** Web · Desktop · Browser extension · Self-host
- **Made for:** Developers · No-code users
- **Website:** [prompt.always200.com](https://prompt.always200.com)
- **Also known as:** 提示词优化器

## What it can do

- **[Prompt optimization](https://godooo.ai/en/capability/prompt-engineering)** — main job, _proposed by a machine, awaiting calibration_. “Prompt Optimizer is a powerful AI prompt optimization tool that helps you write better AI prompts and improve the quality of AI outputs.” (read on [github.com](https://github.com/linshenkx/prompt-optimizer), 2026-09-24)

## Alternatives

- **[prompts.chat](https://godooo.ai/en/product/prompts-chat)** (Open source, free): Also does: Prompt optimization
- **[DSPy](https://godooo.ai/en/framework/dspy)** (Open source, free): Also does: Prompt optimization; runs offline
- **[Fabric](https://godooo.ai/en/cli/fabric)** (Open source, free): Also does: Prompt optimization
- **[Langfuse](https://godooo.ai/en/product/langfuse)** (Open source, free): Also does: Prompt optimization
- **[Phoenix](https://godooo.ai/en/framework/phoenix)** (Open source, free): Also does: Prompt optimization; runs offline

## Connections

- **Applies:** [Prompt Engineering](https://godooo.ai/en/concept/prompt-engineering)

## Questions

### What is Prompt Optimizer?

Prompt Optimizer is an open-source AI app, launched in 2025, made for developers and people who don't write code. A tool for rewriting, testing and comparing prompts, on the web, desktop or as a browser extension.

### Is Prompt Optimizer free?

Yes. Prompt Optimizer is open source and free to use.

### Is Prompt Optimizer open source?

Yes. The source code is at https://github.com/linshenkx/prompt-optimizer.

### Can Prompt Optimizer run locally?

Prompt Optimizer can be self-hosted on your own server.

### What can Prompt Optimizer do?

Main jobs: Prompt optimization.

### What are open-source alternatives to Prompt Optimizer?

Open-source ones: prompts.chat, DSPy, Fabric, Langfuse and Phoenix.

## Sources

- [github.com](https://github.com/linshenkx/prompt-optimizer) — checked 2026-09-24
- [prompt.always200.com](https://prompt.always200.com)

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Last updated 2026-09-24 · sources checked 2026-09-24 · Markdown version of https://godooo.ai/en/product/prompt-optimizer. Every page on this site has one: add .md to its address.