Guides
Every GenHub tutorial and reference, in one place — favicon sizing and fixes, QR code formats and use cases, and color format references.
Favicon guides
Favicon size guide
The favicon sizes that actually matter in 2026 — 16, 32, 48 for the .ico, 180 for Apple touch, 192 and 512 for Android/PWA — with the exact HTML and why each one exists.
PNG to favicon
Convert any PNG into a real multi-resolution favicon.ico plus every size and the HTML snippet, in your browser. Free, no watermark, nothing uploaded.
Apple touch icon generator
Generate a 180×180 apple-touch-icon.png for iOS home screens, with the right HTML, in your browser. Part of GenHub's free favicon generator.
Favicon not showing? Here's how to fix it
Favicon still not showing up in the browser tab, Google search, or on an iPhone home screen? Every real cause, in the order to check them, with the fix for each.
QR code guides
Dynamic QR code generator
Create a dynamic QR code whose destination you can change anytime without reprinting, plus scan analytics. Static QR codes are free; dynamic is GenHub Pro.
QR code with tracking
Track QR code scans: total, unique, country, device and OS — privacy-first, no raw IPs stored. Tracked dynamic QR codes are part of GenHub Pro.
WiFi QR code generator
Make a free WiFi QR code: guests scan to join your network — no typing the password. Supports WPA/WPA2, WEP and open networks. PNG and SVG export.
QR code with logo
Add a logo to the center of your QR code and keep it scannable by raising error correction to H. Free PNG and SVG export, no watermark.
Static vs dynamic QR codes: which do you need?
Static QR codes are free and permanent; dynamic QR codes cost a Pro subscription but let you edit the destination and see scan analytics. How to decide which fits your use case.
QR code for restaurant menus
How to make a QR code menu that actually works in a dining room: which QR type to use, where to host the menu, table-card sizing, and the mistakes that get codes ignored.
vCard QR code generator
Generate a QR code that saves your name, phone, email and company directly to someone's contacts with one scan — no app, no typing. Free, unlimited, no signup.
Color palette guides
Color palette from image
Upload an image and extract its dominant colors into a palette using median-cut quantization, right in your browser. Copy hex, share or export. Free.
Complementary color generator
Generate complementary, triadic and analogous color schemes from any base color. Copy hex/RGB/HSL, check contrast, share a link. Free, no signup.
Hex color palette generator
Build a hex color palette fast: reroll with spacebar, lock favorites, copy hex/RGB/HSL, export CSS variables or JSON, and share a link. Free.
Hex vs RGB vs HSL: which should you use?
Hex, RGB and HSL all describe the exact same colors in different notations. What each one is actually good for in CSS and design work, with real conversion examples.