Wi-Fi WPA3/WPA2 QR Code Card Generator & 2.4/5/6GHz Channel Planner (2026)

In the 2.4GHz band, each channel center frequency is spaced only 5MHz apart (Channel 1 = 2412MHz, Channel 2 = 2417MHz, etc.), yet a standard 802.11n/ax channel is 20MHz to 22MHz wide. Channels 1, 6, and 11 are the only three channels spaced 25MHz apart so their radio waves do not overlap. Choosing an in-between channel like Channel 3 or 8 causes severe Adjacent-Channel Interference (ACI), where overlapping routers treat each other as raw radio noise rather than taking polite CSMA/CA turns.

In WPA2-PSK, an attacker within radio range can capture a single EAPOL 4-way handshake or a router PMKID frame and run Hashcat offline at hundreds of thousands of guesses per second. WPA3 replaces the static Pre-Shared Key handshake with Simultaneous Authentication of Equals (SAE / Dragonfly handshake), an Elliptic Curve Diffie-Hellman exchange that provides forward secrecy and forces an attacker to interact live with the AP for every single password guess.

Channels 52 through 144 in the 5GHz band (UNII-2A and UNII-2C) are shared with military, aviation, and Doppler weather radar systems (especially Terminal Doppler Weather Radar on channels 120–128). Wi-Fi routers using DFS channels must listen for radar pulses for 60–600 seconds (Channel Availability Check) before broadcasting and automatically vacate the channel if radar is detected.

In legacy Wi-Fi, management frames (Deauthentication and Disassociation) are completely unauthenticated, allowing cheap ESP8266/Flipper/aireplay-ng tools to spoof the router's MAC address and kick clients offline. Enabling 802.11w (mandatory in WPA3, optional in WPA2) cryptographically signs management frames so client devices ignore forged deauth packets.

No. Unlike many online QR generators that call remote image APIs with your password in the URL query string, this tool computes the Reed-Solomon error-correction codewords and renders the QR matrix 100% locally in client-side TypeScript.