How to Create a Wi-Fi QR Code: A Practical Sharing Guide
Create a Wi-Fi QR code using your network name and password. Learn about guest networks, printing, scanning and password changes.
What a Wi-Fi QR code contains
A Wi-Fi QR code stores the network name or SSID, security type and, when needed, password in a format compatible readers understand. A supported camera can offer to join that network. The code does not create an internet connection or change router settings; it simply shares an existing network. Astrotor produces static codes whose contents are stored in the image, without a redirect through our service.
Choose the network name and security type
Select Wi-Fi in the QR generator. Enter the SSID exactly, preserving spaces and capitalization, and choose the security type that matches the router. Common WPA/WPA2 networks work with many phones, but enterprise authentication or captive guest portals may require steps beyond this simple format. Select an open network only if it genuinely has no password, and mark hidden networks correctly.
Share a guest network where possible
A separate guest network gives you more control than distributing the main network password. If supported, restrict guest access to local devices. Anyone who sees or photographs the QR code can read the password encoded in it: the pattern is not encryption. Before putting a code on a public poster, review which network it exposes and what that network allows guests to access.
Test with a phone before printing
Keep strong contrast between QR dots and the background, preserve the quiet border, avoid stretching and keep logos from obscuring too much data. SVG or PDF suits printing; PNG is convenient for digital sharing. Scan with another device and confirm the network name and connection result before publishing. Small print, glossy surfaces and longer scanning distances may require a larger code; no single size works in every setting.
Replace the code when credentials change
The SSID and password inside a static code cannot be updated remotely. After changing either, generate a replacement and update printed copies. The old image remains readable but offers obsolete connection details. Businesses needing frequent access changes should also use their router’s guest-network controls. Astrotor does not count scans or provide a visitor or Wi-Fi connection analytics dashboard.