Sioyek icon
Sioyek icon

Sioyek

 18 likes

Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.

Main view

License model

  • FreeOpen Source

Application type

Country of Origin

  • US flagUnited States

Platforms

  • Mac
  • Windows
  • Linux
4.5 / 5 Avg rating (6)
18likes
5comments
0news articles

Features

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Properties

  1.  Keyboard focused
  2.  Lightweight
  3.  Support for Themes

Features

  1.  Dark Mode
  2.  PDF annotation
  3.  Ad-free
  4.  Full-Text Search

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Sioyek information

  • Developed by

    US flagAli Mostafavi
  • Licensing

    Open Source (GPL-3.0) and Free product.
  • Written in

  • Rating

    Average rating of 4.5
  • Alternatives

    37 alternatives listed
  • Supported Languages

    • English

AlternativeTo Categories

Office & ProductivityEducation & ReferenceNews & Books

GitHub repository

  •  7,981 Stars
  •  267 Forks
  •  230 Open Issues
  •   Updated Jun 7, 2025 
View on GitHub

Our users have written 5 comments and reviews about Sioyek, and it has gotten 18 likes

Sioyek was added to AlternativeTo by hexo on Aug 10, 2021 and this page was last updated Jan 9, 2025.

Comments and Reviews

   
 Post comment/review
Top Positive Comment
inshilon
Jul 14, 2024
0

It has a ton of interesting and unique features for the PDF hoarder

Sam Lander
Jan 23, 2024
0

I like the simple layout and that it is portable.

It's not very intuitive. The instructions when you start it do not say anything about navigating to a specific page.

There doesn't seem to be any tabs.

There doesn't seem to be dark mode/color inversion.

hced
Aug 20, 2023
0

Very unique PDF Reader. It's super-fast, super-slim (also comes as a portable app). Not for everyone since it's very keyboard-driven.

Regardless of the keyboard-driven nature, it can be operated by mouse. And there's also very neat built-in helpers that will help learning the app. For instance there's a built-in Tutorial that should bring you up to speed. There's also the : (colon) key for bringing up the Command list, where you can simply search for the operation you're looking to perform. I'd say it's very smart and neatly made despite its geekyness.

Guest
Aug 2, 2022
0

Vim-like navigation (hjkl, m marks).

Spout
Aug 26, 2021
0

As of Aug 24 2021 the developer is working on a Mac version and there is is a beta available for testing: https://github.com/ahrm/sioyek/issues/15

What is Sioyek?

Features include:

  • Ability to click on References and Figures in order to go to their definitions (event if the PDF document doesn't provide links)
  • Ability to search all the previously opened documents
  • Browser style history navigation
  • Ability to mark locations within PDFs using symbols (similar to vim)
  • Ability to create "portals" between different locations in a document. For example you can create a portal from a paragraph which is talking about a figure to the figure itself. Then when you navigate to the paragraph, the figure will be automatically displayed in a helper window.
  • Dark Mode
  • SyncTex support

Sioyek Videos

Official Links