Sioyek
PDF viewer with a focus on technical books and research papers
sioyek.info Source★ 1,148Writing & Documents / PDF & Document Tools
- Monthly visits
- 6.7K
- Down7.7%MoMSep 2026
- Public revenue
- Undisclosed
- No public revenue evidence yet
- Entry price
- Free
- No monthly subscription pricing
- Launched
- 5y ago
- 2021-07-20 · Est.
Traffic
Marketing moves
Launches, search & content, referrals, promotionsLaunched 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 Stars
- ★ 1,148
- Forks
- 63
- License
- See repository
- Primary language
- Go
Traffic sources
Traffic breakdown
Channels
- Direct40%
- Organic Search33%
- Referrals10%
- Social7%
- Other11%
Countries
- India34%
- Germany20%
- Brazil16%
- Vietnam15%
- United States11%
Search
Domain authority —Domain registered 2021-07-12
| Keyword | Monthly volume |
|---|---|
| sioyek | 1,670 |
| is there a more efficient version of obsidians pdf viewer | 310 |
| sumatra pdf reader alternative for mac | 190 |
| sioyek pdf | 140 |
| sioyek for macos | 130 |
Traffic data: Vaneform
Pricing
Pricing page not identified yet, or no public pricing listed.
Pages & changes
Key pages
Weekly snapshotsChanges
No pricing, plan, or positioning changes detected since tracking started.
Design
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
- Category Positioning Anchor
- Video Demo
Palette · click to copy
- Typography
- 7.0
- Color & Contrast
- 7.0
- Layout & Spacing
- 7.0
- Craft & Polish
- 6.0
- Distinctiveness
- 5.0
Structure
- Fonts
- Arial
- Hero layout
- Split Copy & Visual
- Primary visual
- Product UI Screenshot / Component
- Conversion CTA
- Download App / Install Extension
- 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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