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Products that do what Turn Newsletters into Interactive GPTs does

I’ve been hacking on a project called Bookshelf (https://www.bookshelf.diy/). It lets you take an archive — say, your Substack export, a bunch of PDFs, or even saved HTML files — and turn that into a retrieval-backed GPT that your readers can query. The idea is: instead of scrolling archives, they just ask questions. Answers are pulled only from your original content, with citations. It’s aimed at writers and researchers who want their work to be more discoverable — but without spinning up vector infra or fiddling with RAG pipelines. For context: I’ve always gone back to Paul…

  1. 1

    Let readers chat with your archive in their ChatGPT app

    2025

  2. 2DQ

    Hello fellow hackers, we made a site that gets GPT to answer your question using the info on a webpage you specify or document you upload (e.g., a large textbook .pdf file). Background: When ChatGPT came out, I had the idea of having it pull answers from my stereo receiver's annoyingly dense 32 page manual. My weekend project prototype proceeded to surprise with great answers—just like what we've all experienced by now. My co-founder thought we should productize it, and make it easy to use online. So here we are with a very early beta! (Try it on a HN thread...)

    2023 · klavier.ai

  3. 3IM

    My partner usually writes substack posts which I then mirror to our website’s blog section. To automate this, I made a simple tool to scrape the post and clean it so that I can drop it to our blog easily. This might be useful to others as well. Oh and ofcourse you can instruct GPT to make any final edits :D

    2024 · markdowndown.vercel.app

  4. 4TB

    So far I've used it to reference ideas from books I've read before. I've also used it to explore books I have not read before by asking the bot questions. Some people have told me they use it like a reading companion. They pause while reading the book if they have a question, and use Konjer to answer it.

    2023 · konjer.xyz

  5. 5IM

    Hey HN! I love finding new books to read on here. I wanted to gather the most mentioned books and recreate the serendipity of physical browsing. I scraped 20k comments from HN threads related to reading, extracted the references and opinions using GPT-4o mini, and visualised their embeddings as a map. - OpenAI's embeddings were processed using UMAP and HDBSCAN. A direct 2D projection from the text embeddings didn't yield visually interesting results. Instead, HDBSCAN is first applied on a high-dimensional projection. Those clusters tend to correspond to different genres. The genre…

    2024 · hnbooks.pieterma.es

  6. 6IM

    Hi, I'm a high school teacher from Australia and I've built what I'd like to think is a pretty nifty ChatGPT powered presentation tool for teachers. I'd love it if you could have a look at it and give me some of your feedback. I don't think there's much overlap with the HN crowd and school teachers, but I've been coming here for many years and thought I'd post here and see what you all think. Check it out if you have a minute and I'd be super happy to hear your feedback too. https://www.slidehero.ai/ You can jump in and have a play with the tool all you like ;) Cheers, Eli

    2025

  7. 7
    writeGPT272

    Become Superhuman with everyday tasks by harnessing ChatGPT

    2023

  8. 8

    Chat with any documents and get responses with cited sources

    2023

  9. 9

    Turn pdfs into social media-like posts

    2024

  10. 10

    Write research-backed articles with citations

    2025

  11. 11

    Show others obnoxiously how to use ChatGPT

    2024

  12. 12MP

    I built a pipeline that turns tweets about ML papers into a podcast. Code's up here. Happy hacking. https://github.com/yacineMTB/scribepod

    2023 · scribepod.substack.com

  13. 13WV

    My friends and I were really excited to try out ChatGPT when it was released. We were amazed by its power and capabilities. We were thinking how great it would be if people could use ChatGPT to ask questions from their own data. So me and my friends had decided to build such a tool. We are delighted to announce that we are releasing a public beta of our tool> After you upload all your pdf files into it. It can search for relevant documents without perfect keyword match, summarize takeaways from the document specific to your question, and extract key information from the document. It can help…

    2023 · askcorpora.com

  14. 14CB

    This weekend wanted to try out the streaming ChatGPT API. As test project, created a simple website, which allows you to create whole books by providing just the title (with optional extra instructions). Given the title of the book, table of contents, chapters and sections with text content are generated. All books are listed on the home page, sorted into topic categories. As a bonus, when reading a specific section of a chapter, you can use the chat interface to ask for clarifications, request more content, list relevant topics, etc. The system does quite well with knowledge based books…

    2023 · books-by-ai.vercel.app

  15. 15IG

    This holiday weekend, I created a GPT for Instabooks, which allows you to instantly generate textbooks on any topic within ChatGPT. Why? ChatGPT is great for learning stuff, but sometimes you just want to go deep and read an entire book about something. For example, there's a great talk by Stephen Wolfram that just goes over my head (https://www.youtube.com/watch?v=fLMZAHyrpyo), so I copy/pasted the transcript into the GPT and it generated a textbook that goes deep into all the topics from that video…

    2023 · chat.openai.com

  16. 16

    Transfrom ChatGPT conversations into beautifully PDF.

    2025

  17. 17HC

    A year and a half after I published https://HackYourNews.com, I've rewritten it to be neater and added support for more news sources. HackYourNews.com v1 had a great response on HN [1] and consistently sees ~2k weekly unique visitors. There were many long-standing requests that I wanted to fulfill (thanks for your patience!): a proper dark mode, correct rendering on mobile devices, and more cogent summaries. This rewrite is the result. gpt-4o-mini reduces the cost of summarization to an absurd degree, so it's now sustainable to keep this free service going! Someday, I hope to use…

    2025

  18. 18

    Made this because ChatGPT scrolling hurt my fingers

    May 2026 · gpttopdf.site

  19. 19HN

    Just a personal experiment to build my first custom version of ChatGPT :) I'm spending too much time on this site, so it might ocasionally save me some scrolling and reading. Far from perfect and I'll continue to finetune it. I might even feed it with some classification data for each post, such as: Post: https://news.ycombinator.com/item?id=38167604 Categories: ["Health, Tech Gadgets, AI"] Comment Perspectives: - 3 Medical Innovation Appreciation - 1 Technical Analysis - 1 Limitations Acknowledgment Edit: Looks like OpenAI is having outages today and custom GPTs are only…

    2023 · chat.openai.com

  20. 20DC

    Uses hybrid semantic search (combination of dense embeddings and sparse vectors) to retrieve high quality answers across your documents. Features - Significantly faster than competition (Process a 200 page PDF in <5s) - Much better answer quality - Fast summarization tool - Beta API for end to end extractive document QA ([email protected]) Try it out (no login) - Llama 2 paper https:&#x2F;&#x2F;www.dankgpt.com&#x2F;chat&#x2F;346f444d-e286-4671-b157-540f4cb... - Scott Aaronson Quantum Information Science lectures…

    2023 · dankgpt.com

  21. 21GC

    With all the "what can GPT do", I went to dabble with it to see if I could do something that plays to its strengths rather than just speculating about "would it be good at that?" https:&#x2F;&#x2F;gist.github.com&#x2F;shagie&#x2F;ff2f67b33bb517f6a297e2da66530cf4 The basis for the prompt is: Classify following titles into one or more of {US Politics}, {World Politics}, {Technology}, {Security}, {Current Events}, {Boasting}, {Curiosity}, {Unknown} The results from the front page as I type this: 34152137 Technology: Lite XL: A lightweight text editor written in C and Lua 34151880 Curiosity:…

    2022

  22. 22IC

    On my new large screen, it was a little cumbersome to read PG's essays because they are sticking so far off to the left. I center aligned it so it's a bit more readable. Took 2 hours with chatgpt to ideate, build, and publish.

    2025 · github.com

  23. 23IB

    Hi HN! I built a proof of concept 'newspaper' that creates short news articles of today's current events with GPT. This is a very rough proof of concept but I can't help but think this concept is the future. I think we'll all have AI daily newspapers in whatever theme we want, covering any amount of information we want, with the ability to expand or contract article length instantly. Sharing just to get everyone thinking about this future. Thanks for reading!

    2023 · thegordonpost.com

  24. 24YC

    Easily collect all transcriptions from a YouTube channel to create your own custom GPT (via OpenAI) or querying a large context window (Claude 2.1) The example is “CY GPT” your very own Sichael Miebel and Calton Daldwell in your pocket. I have a backlog of open-source projects, hope this helps!! This is counter intuitive (as I’m posting this) but please respect the creators copyright and use for research purposes only

    2023 · github.com

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