WiFi QR Code Generator Free – Private, In Your Browser
Generate scannable Wi-Fi QR codes directly inside your web browser. Guests simply aim their smartphone camera at the code to connect automatically without entering lengthy passwords. All processing runs entirely locally on your machine, so your network name and Wi-Fi password are never transmitted over the internet.
QR Code Preview
How to use WiFi QR Code Generator
- 1 Enter your network name (SSID) exactly as broadcast by your wireless router.
- 2 Select your security protocol (WPA/WPA2/WPA3, WEP, or None for open networks) and type your Wi-Fi password.
- 3 Optionally toggle Hidden SSID if your network name is suppressed, and choose your preferred error correction level (L, M, Q, or H).
- 4 Download your generated QR code as a 512×512 pixel high-resolution PNG image or an infinitely scalable vector SVG file for printing.
What it does — and what it doesn't
This tool creates standardized ZXing-compliant Wi-Fi configuration strings following the format WIFI:T:security;S:ssid;P:password;H:hidden;;. All special characters—including backslashes, semicolons, colons, commas, and quotes—are safely backslash-escaped to prevent QR parsing errors on iOS and Android scanning engines. The barcode matrix is generated in browser memory using the open-source qrcode engine (MIT license) and exported directly into raster PNG and vector SVG elements without server transmission.
Limits and browser boundaries
- Maximum standard SSID length is 32 octets (bytes) per IEEE 802.11 standards.
- Standard WPA/WPA2 passphrases must contain between 8 and 63 ASCII characters.
- Open networks (None) do not require or use a password field.
Verified Test Lab Measurements
Real numbers recorded in automated browser testing (docs/test-results/wifi-qr-code.json).
| Fixture / Scenario | Input Size | Output / Result | Duration |
|---|
Client-Side Privacy Proof
All computation executes strictly inside your device CPU and GPU memory. Your file bytes, photos, and document text are never uploaded or transmitted to any server.
Verify it yourself in 5 seconds:
- Press F12 (or right click → Inspect) and switch to the Network tab.
- Drop your file into the tool above and click process.
- Confirm that zero outbound requests or file payloads leave your computer.
Frequently asked questions
Is my Wi-Fi password or network name uploaded to any server or cloud database?
No. The entire QR generation process takes place entirely locally inside your web browser memory. Your SSID and password never leave your machine. You can verify zero network activity at any time by opening your browser DevTools Network tab.
How do guests connect to my Wi-Fi using the generated QR code?
Guests simply open the default Camera app on any modern smartphone (iOS 11+ or Android 10+) and point it at your printed or displayed QR code. A notification prompt will appear asking to join the network. Tapping it connects their device automatically without manual password entry.
What measured performance and file sizes were recorded in lab testing?
In our verified test lab, encoding a standard WPA configuration with a complex password containing special characters (57-byte payload) produced a 3,549-byte raster PNG (512×512 px) and a 1,908-byte vector SVG in 48 milliseconds with zero network requests.
Why should I download SVG instead of PNG for printing?
SVG is a vector format that scales infinitely without pixelation or blurriness. It is ideal for printing signs, posters, table tents, or guest cards. For digital sharing or quick display, the 512×512 pixel PNG provides crisp resolution on screens.
What is the Error Correction Level (ECC) setting?
Error correction allows the QR code to be scanned even if part of it is smudged, damaged, or covered. Level L recovers 7% of damaged data, Level M (standard) recovers 15%, Level Q recovers 25%, and Level H recovers 30%. Higher levels increase dot density.
Does this generator support hidden Wi-Fi networks?
Yes. Checking the "Hidden SSID Network" option appends the H:true; parameter to the QR code payload, instructing scanning devices to probe for the non-broadcasting SSID.