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Alternatives

Products that do what Prompt Inspector – A browser-like inspect tool for prompts does

I was working on a project that involved indexing GitHub repos that used really long prompts. Iterating over each section and figuring out which parts of the prompt led to which parts of the output was a quite painful. As a frontend dev, I kept thinking it would be nice if I could just 'inspect element' on particular sections of the prompt. So I built this prompt debugger with visual mapping that shows exactly which parts generate which outputs. Now that context windows are getting huge, working with massive prompts should not be as difficult. Planning to open source this soon, but I'd love…

  1. 1

    The ultimate prompt engineering workbench

    2025

  2. 2

    The visual prompt engineering tool

    2022

  3. 3

    Automate assembling the perfect context for your project

    Jan 2026

  4. 4PL

    Hi HN, I've been working on an experimental tool that helps you use GPT to work on your codebase. I'd love to improve the tool if there's interest. New ideas welcome! I think this could also be useful for experimenting with other types of recursive prompts. It’s a little bit Swiss Army knife and a little bit skynet: https://github.com/ferrislucas/promptr From the README: Promptr is a CLI tool for operating on your codebase using GPT. Promptr dynamically includes one or more files into your GPT prompts, and it can optionally parse and apply the changes that GPT suggests to…

    2023 · github.com

  5. 5
    Prompter128

    Generate instant AI prompts based on your projects

    2025

  6. 6PO

    Hey HN! We’re Kevin and Steve. We’re building PromptTools (https://github.com/hegelai/prompttools): open-source, self-hostable tools for experimenting with, testing, and evaluating LLMs, vector databases, and prompts. Evaluating prompts, LLMs, and vector databases is a painful, time-consuming but necessary part of the product engineering process. Our tools allow engineers to do this in a lot less time. By “evaluating” we mean checking the quality of a model's response for a given use case, which is a combination of testing and benchmarking. As examples: - For generated…

    2023 · github.com

  7. 7

    Instantly test and compare AI prompts results across models

    2025

  8. 8

    AI wrote it. LineageLens proves it.

    May 2026 · lineagelens.dev

  9. 9PR
  10. 10

    Helps you write better prompts

    2022

  11. 11
    Prompt138

    A command line application to interact with ChatGPT's API

    2023

  12. 12

    Cursor, Windsurf, Claude, Prompt, Code Generation

    2025

  13. 13

    AI Prompt Generator, Optimizer & Library

    2025

  14. 14

    Monetise your prompts & GPTs

    2023

  15. 15

    Markdown Sidebar for AI Prompts

    Apr 2026 · sites.google.com

  16. 16

    AI Prompt Generator, Optimizer & Library

    Jun 2026 · promptessor.com

  17. 17IM

    As I was building my first few chains, I noticed how difficult it was to understand what was going on, why GPT was responding the way it was, and how I could improve it. Tinkering with my prompts was so tedious - I had to either update the prompt template and rerun the whole chain, or grab the actual prompt, take it to OpenAI playground, tweak it there, and then make a template out of it again. That's why I decided to build something better! PromptWatch allows you to tune your prompt templates in the browser in a format appropriate for LangChain, decoupling template from parameters data. It…

    2023 · promptwatch.io

  18. 18AT

    Hey HN! While writing prompts for a few projects recently, a couple of friends and I realised that writing prompts today is like writing code in a txt file - it sucks and there is no tooling to help you. So we decided to hack on a tool to help you fix this - https://optimist.varied.ai/ It is literally a hack rn but we already find it useful for writing prompts. That said we'd love to talk to folks who are writing serious prompts everyday and see how the product can be better. Also the only reason the waitlist is there, is running this is super expensive like $100/day for…

    2023 · optimist.varied.ai

  19. 19PE

    Hey HN, We've been hard at work on a tool that we believe will change the game for developers, data scientists, and anyone working with models that rely on textual prompts. I'm excited to introduce our new tool: Automated Prompt Engineering (APE). Problem: As many of you know, how you phrase a prompt can significantly impact the results you get from models, especially with sophisticated language models. It often requires numerous iterations to hone in on the right prompt to obtain the desired response. Solution: APE is designed to tackle this exact problem. With APE, you can: - Iterative…

    2023

  20. 20

    Fix, debug & version AI prompts — like code

    Jan 2026

  21. 21IB

    After countless hours of solo coding, designing, and iterating, I’m both excited and nervous to share my first-ever product: PrompTessor — now live. As someone who constantly experiments with AI tools like ChatGPT and Midjourney, I often found myself stuck in a loop of trial-and-error. The issue wasn’t always the AI — it was often the prompt itself. That observation became the starting point for PrompTessor. This tool doesn’t just optimize your prompt — it analyzes it. It gives you: - A prompt score - A breakdown of strengths and weaknesses - A fully optimized version of your prompt - And…

    2025 · promptessor.com

  22. 22

    Design clear prompts before running AI coding tools

    Dec 2025

  23. 23

    Generative Engine Optimization (GEO) tool to appear in AI

    2025

  24. 24

    Make LLM prompts debuggable.

    Jan 2026

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