# ahrm/sioyek

Sioyek is a PDF viewer with a focus on textbooks and research papers

Repository: https://github.com/ahrm/sioyek
Canonical: https://ross.abutalabs.com/products/sioyek
Homepage: https://sioyek.info/
Language: C
License: GPL-3.0
License Family: copyleft
Topics: pdf, pdf-viewer, research-paper
Last push: 2026-08-18T18:16:43+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 8, longevity 100
- inputs: {"age_days": 1879, "days_push": 15, "days_rel": 721, "gap_med": null, "n_releases_24m": 1}
- flags: prerelease_only
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 9805, forks 365 (observed 2026-08-28T04:10:37.272133+00:00)

## What it is
Sioyek is a keyboard-focused PDF viewer designed for reading textbooks and research papers. It offers smart jumps to references, portals for viewing figures alongside text, searchable highlights and bookmarks, and Synctex support for LaTeX workflows.

## Use cases
- read research papers with quick jumps to bibliography and figures
- view a figure in a second window while reading the text
- search and manage highlights and bookmarks across PDFs
- preview LaTeX-compiled PDFs with Synctex jump support
- generate a table of contents for PDFs that lack one
- read technical books with a visual reading ruler
- extend the viewer with OCR, translation, or text-to-speech scripts

## When to choose
- you read academic papers or textbooks on a desktop and want fast keyboard-driven navigation
- you need Synctex integration for LaTeX editing workflows
- you want searchable highlights, bookmarks, and portals in a lightweight native viewer

## When to avoid
- you need PDF form filling, signing, or annotation collaboration features
- you want a mobile or web-based PDF reader
- you need a general-purpose document manager rather than a viewer

## Facets
- artifact type: application
- maturity: active
- function: pdf-viewer, search-engine, ocr
- domain: pdf, developer-tools, education
- platform: windows, cross-platform
- tags: pdf-viewer, research-papers, textbooks, keyboard-driven, latex-synctex, qt, research, macos, linux, desktop

## Member repositories
- ahrm/sioyek (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:37.272133+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:20:58.421692+00:00, confidence not recorded.
  - readme: https://github.com/ahrm/sioyek (fetched 2026-08-28T04:10:37.272133+00:00, sha 433379f89e7b)
  - homepage: https://sioyek.info/ (fetched 2026-08-29T08:20:33.011469+00:00, sha 90a888748cae)
- Data as of 2026-08-30T08:39:29.467469+00:00.