Ask HN: What internal tool did you build that became a product?

4 points by nehpets 14 hours ago | 4 comments

freakynit 13 hours ago |

I built https://pagey.site initially for my own self since I was creating an insane lot of small one-page sites using LLM for various utilities/calculators/explanations etc. and needed a single place to host them.

Initial version was super minimal, but then, a lot of people started using it. So, revamped it into full product and launched it. Currently hosting over 300 sites, with 10 new sites getting added daily. All free for now. I personally has 53 sites as of now.

Sample stuff of mine:

1. [latency-numbers-2026] - https://latency-numbers-2026.pagey.site/

2. [NVIDIA (NVDA) — The Short / Underperformance Thesis] - https://nvidia-stock-analysis.pagey.site/

3. [Shamir's Secret Sharing] - https://shamirs-secret-sharing.pagey.site/

4. [Build Software Like It Needs To Last] - https://building-software-the-right-way.pagey.site/

5. [NPM Supply Chain Attack Techniques] - https://npm-supply-chain-attack-techniques.pagey.site/

6. [NPM Ecosystem Threat Report (May 19, 2025 - June 1, 2026)] - https://npm-supply-chain-attacks-25-26.pagey.site/

https://pagey.site

dennis16384 14 hours ago |

I built a question-to-sql-to dashboard tool for quick data analysis, just to avoid sharing random personal or customer xlsx documents with external AI. Released it as MIT recently:

https://eatmydata.ai/

https://github.com/eatmydata-org/eatmydata

freakynit 13 hours ago | |

Nice... I built something same last year (not active anymore): https://www.producthunt.com/products/zenquery

It was able to query csv, json, parquet and xlsx files, all locally. You could also mix files of different types in single session, and, manage multiple sets of files as individual sessions that you can switch easily whenever needed.

abstractspoon 6 hours ago |

I started building ToDoList to manage multiple projects on CodeProject. That was is 2003. Still working on it daily. www.abstractspoon.com