Products

Sioyek

PDF viewer with a focus on technical books and research papers

sioyek.info Source★ 1,148Writing & Documents / PDF & Document Tools

AI Benchmark
Desktop
Mobile
Monthly visits
6.7K
Down7.7%MoMSep 2026
Public revenue
Undisclosed
No public revenue evidence yet
Entry price
Free
No monthly subscription pricing
Creators
ali mostafavi
@ali_mostafavi_· 142 followers
Launched
5y ago
2021-07-20 · Est.

Traffic

Monthly visitsData through Sep 2026 · Oct 2026 pending

Marketing moves

Launches, search & content, referrals, promotions
X accounts@ali_mostafavi_
  • Launched on Product HuntLaunch

    Academic PDF Viewer

    Jul 20, 2022 · 4y agoLaunch page

  • Launched on Show HN (272 pts · 63 comments)Launch

    Sioyek – PDF viewer for reading research papers and technical documents

    Jul 20, 2021 · 5y agoLaunch page

Open Source & Self-Hosting

GitHub · MCP / Skill
Last commit 2026-10-29
GitHub Stars
★ 1,148
Forks
63
License
See repository
Primary language
Go

Traffic sources

Sep 2026

Traffic breakdown

Channels

  • Direct40%
  • Organic Search33%
  • Referrals10%
  • Social7%
  • Other11%

Countries

  • India34%
  • Germany20%
  • Brazil16%
  • Vietnam15%
  • United States11%

Search

Domain authority —Domain registered 2021-07-12

KeywordMonthly volume
sioyek1,670
is there a more efficient version of obsidians pdf viewer310
sumatra pdf reader alternative for mac190
sioyek pdf140
sioyek for macos130

Traffic data: Vaneform

Pricing

Pricing page not identified yet, or no public pricing listed.

Pages & changes

Tracked since 2022-07-20

Key pages

Weekly snapshots
Home
sioyek.info/ Snapshot 2026-11-04

Changes

No pricing, plan, or positioning changes detected since tracking started.

Design

First-screen visual analysis & :root CSS

Minimal Monochrome (Light canvas, balanced density) featuring split copy & visual layout and product ui screenshot / component visuals.

First-screen preview · click to zoom

First-screen pitch & conversion flow

“Sioyek is a PDF viewer with a focus on technical books and research papers”

Split Copy & Visual hero structure paired with download app / install extension CTA and no explicit trust bar.

Conversion path: Split Copy & Visual + Product UI Screenshot / Component → Download App / Install Extension

Palette · click to copy

5-D design score6.5 / 10
Typography
7.0
Color & Contrast
7.0
Layout & Spacing
7.0
Craft & Polish
6.0
Distinctiveness
5.0

Structure

Fonts
Arial
Primary visual
Product UI Screenshot / Component
Social proof
No Explicit Trust Bar
Navigation
Full-Width Top Bar
Theme & density
Light · Balanced
Corners & depth
Small Radius · Hairline borders
Preview full AI design brief (includes :root CSS variables & layout rules)Style tokens only; never copy brand names, logos, copy, or images
# Design Brief: Minimal Monochrome

Monochrome palette with a single accent color, hairline dividers, and generous whitespace.

## Design Tokens

```css
:root {
  --background: #ffffff;
  --surface: #f8f9fa;
  --foreground: #212529;
  --muted-foreground: #777777;
  --accent: #0d6efd;
  --radius: 4px;
  --font-heading: "Arial", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Arial", ui-sans-serif, system-ui, sans-serif;
}
```

Color area ratio: Background #FFFFFF (~55%) · Surface #F8F9FA (~7%) · Text #212529 (~15%) · Muted Text #777777 (~8%) · Accent #0D6EFD (~15%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.

## Layout & Conversion Structure

- Hero layout: Split Copy & Visual
- Navigation: Full-Width Top Bar
- Theme & density: Light · Balanced
- Border radius & elevation: Small Radius; no drop shadows—separate layers with hairline borders and whitespace
- Primary visual medium: Product UI Screenshot / Component
- Conversion CTA: Download App / Install Extension
- Headline hook: Category Positioning Anchor
- Hero components: Video Demo
- Spatial layout notes: Split Copy & Visual hero structure paired with download app / install extension CTA and no explicit trust bar.
- Visual summary: Minimal Monochrome (Light canvas, balanced density) featuring split copy & visual layout and product ui screenshot / component visuals.

## Avoid

- Multi-stop neon gradients
- Heavy drop shadows
- More than one competing accent color

Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.

Questions & evidence

How much website traffic does Sioyek get?
Vaneform estimates 6.7K website visits in 2026-09. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
What is Sioyek and what platforms does it support?
Sioyek is catalogued under PDF & Document Tools: Sioyek is a PDF viewer with a focus on technical books and research papers. Supported platforms: Web.
Is Sioyek open source?
Sioyek has a public repository (https://github.com/ahrm/sioyek) with its source repository published, recording 1,148 GitHub stars.Source

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