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Alternatives

Products that do what Sioyek – PDF viewer for reading research papers and textbooks does

Some of the features: * Quickly preview or jump to figures/references/equations/etc. (even if the PDF doesn't have links) * Search paper names in google scholar by middle clicking on their name * Searchable table of contents * Searchable highlights/bookmarks * Browser-like history navigation * Mark locations for quick navigation (Vim style) * Synctex support Video demo of some features: https://www.youtube.com/watch?v=yTmCI0Xp5vI

  1. 1SP
  2. 2SA
  3. 3HV

    Hi, I've just finished a rebuild of this function and added a lot of new features: info, page index, minimap, inverted index,... I think it may be useful for inspection, debugging or just as a learning resource showcasing the PDF file format. This is a pet project and I would be happy to receive some feedback! Regards

    2025 · github.com

  4. 4AV
  5. 5IM

    As a grad student (and an ADHDer), I had trouble doing literature review systematically. To combat this, I made a website that finds similar papers using the meaning of the thing I am looking for. I used MixedBread's [^1] embedding model to generate vectors from the abstracts. I store and search similar vectors using Milvus [^2] and finally use Gradio [^3] to serve the frontend. I update the vector database weekly by pulling the metadata dataset from Kaggle [^4]. To speed up the search process on my free oracle instance, I binarise the embeddings and use Hamming distance as a metric. I would…

    2024 · papermatch.mitanshu.tech

  6. 6

    Read documents like an image

    Oct 2025

  7. 7
    note.md280

    your notes and research documentation now a local LLM Memory

    Jun 2026 · notemd.org

  8. 8RR

    Hey HN, cofounder of Readwise here. We've been working on this cross-platform reader app for about 2 years, excited to finally share it in public beta. Probably the most notable thing that makes Reader unique is that it supports almost any content type you could want to save/read/highlight: * web pages * emails/newsletters * PDFs * ePubs * twitter threads * youtube videos (with transcripts) * RSS feeds With all of your knowledge content in one place, we built powerful reading and highlighting, as well as a bunch of novel triage/organization features, so you can actually…

    2022 · readwise.io

  9. 9NI

    Understanding scientific articles can be tough, even in your own field. Trying to comprehend articles from others? Good luck. Enter, Now I Get It! I made this app for curious people. Simply upload an article and after a few minutes you'll have an interactive web page showcasing the highlights. Generated pages are stored in the cloud and can be viewed from a gallery. Now I Get It! uses the best LLMs out there, which means the app will improve as AI improves. Free for now - it's capped at 20 articles per day so I don't burn cash. A few things I (and maybe you will) find interesting: * This is…

    Feb 2026 · nowigetit.us

  10. 10

    Online tool for searching through documents. CTRL+F on crack

    2019

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    ReadHere146

    Lightweight PDF & EPUB reader in your browser

    Jun 2026 · readhere.app

  12. 12PT

    I've developed a Python API service that uses GPT-4o for OCR on PDFs. It features parallel processing and batch handling for improved performance. Not only does it convert PDF to markdown, but it also describes the images within the PDF using captions like `[Image: This picture shows 4 people waving]`. In testing with NASA's Apollo 17 flight documents, it successfully converted complex, multi-oriented pages into well-structured Markdown. The project is open-source and available on GitHub. Feedback is welcome.

    2024 · github.com

  13. 13A
    ArXivTok105

    I made this, and it's fully open source so if someone wants to contribute here you have the url: https://github.com/Miguel07Alm/arxivtok. For this project I was inspired by https://wikitok.vercel.app.

    2025 · arxivtok.vercel.app

  14. 14WB

    I was inspired by Andy Matuschak's Evergreen Notes viewer and created this small web app to browse Wikipedia in the same way. Clicking on a link opens the content in a new pane to the right. And you can resize panes. It's really nice for following rabbit holes or checking out lists from articles. Let me know what you think! Code here: https://github.com/steezeburger/wikipedia-browser

    2024 · steezeburger.com

  15. 15WA

    Hi HN, WikTok is a UI for Wikipedia that lets you quickly swipe (or use your arrow keys) to navigate between random and recommended articles (based on the previous articles you interacted most with). It's just a fun project I hacked together this weekend, so may be a little rough around the edges, but I'd love to get your thoughts. Let me know if you have any suggestions (or find any interesting articles!) Cheers,

    2023 · wiktok.org

  16. 16

    AI-powered PDF reader highlight text, get explanations.

    May 2026 · researchpaprereadingdoc.vercel.app

  17. 17
    Litmaps104

    Search scientific literature with interactive citation maps

    2021

  18. 18

    PDF editor designed for all the ways you work

    2020

  19. 19KI

    2020 · kvak.io

  20. 20WB

    Over the past year, we’ve been frustrated with how clunky it is to manage research papers. So we built Ontosyn, a modern research paper reader, with clean ui, better in paper navigation (bookmarks, jumping back up after clicking on a reference), an integrated ai chat with useful tools such as recommending relevant papers that you can directly add to your library, and, of course, library functionality to keep everything organized. We launched a closed alpha last week, and our first users are quite pleased with it. One user asked for author-based search for paper recommendations yesterday, and…

    Oct 2025 · ontosyn.com

  21. 21IR

    I’ve been frustrated with PDFs and found arXiv HTML lacking, so I built a fully interactive paper reader. Features: • Hover references, citations, equations • Light/dark mode • Auto-generated dependency graphs for definitions/lemmas/theorems • Table of contents that syncs with scroll • Highlighting + annotations • “Copy raw LaTeX” anywhere Featured paper: Video models are zero-shot learners and reasoners (Veo 3) https://www.sciencestack.ai/arxiv/2509.20328v2

    Nov 2025 · sciencestack.ai

  22. 22AW

    Hey, I've made a pdf reader with ai assistance, you can quickly ask questions about the text and the images, and it will have context about all of your reading material so you can ask questions freely, try it now, I'm in open beta to find bug and get feedback. upcoming features: - Highlighting - Highlighting with Notes - Bibliography - Automatic Reference file opening - Improved UX and robustness currenlty alot of bugs so please let me know if you found any. feedback appreciated

    2025 · pdf-hub.com

  23. 23SH

    Sci-Hub Scholar is a browser extension that takes Google Scholar search results and tries to point them at Sci-Hub, where they can be read freely. The main selling point for this extension versus others is that it works right on the results page, rather than the article page at the pay-walled website. One night, I decided I was going to do some research, only to find every Google Scholar Result behind a paywall. Trying to find the link on Sci-Hub, I ran into a bunch of issues: * https://whereisscihub.now.sh/ is down * Annoying to copy/paste title to Sci-Hub * Didn't want…

    2022 · addons.mozilla.org

  24. 24IA

    Hey HN! I've build a simple tool to index and search your documents. This uses two great open source libraries: apache tika (for extracting content from docs) and apache lucene (for searching). It's been built with kotlin ktor as a web framework. You can index all kind of files (i.e doc, docx, xls, ppt, pdf, txt, html even ORC pdfs) and then search them using very advanced queries like "always contain X", "never contain X", "X near Y", wildcard search, proper stemming support etc. We're using it on my work where we have hundreds of thousands of doc/docx/pdf files and it works…

    2024 · github.com

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