How to scan a QR code on Windows

Short answer: desktop PCs rarely have the code in front of a camera — they have it as a picture. Save or screenshot it and decode the file with a free tool like QR Code Scanner: offline, batch, one click to copy.

Why “just scan it with your phone” is not enough

Phones scan QR codes from a live camera. On Windows the workflow is inverted: the code usually arrives as a screenshot in chat, a photo synced from a phone, or a downloaded ticket. Pointing a webcam at a monitor works in theory and fails in practice — glare, refresh, moiré, angle. Reading the image file directly is faster and works 100% of the time.

Method 1: Phone Link / camera (workarounds)

• Phone Link: project the screen to a phone and scan it with the phone camera. Serviceable, but a chain of three devices to read one link.
• Webcam + Phone apps: hold the phone to the monitor — unreliable due to screen glare and scan patterns.

Neither solves the common case cleanly: the QR code is already a file.

Method 2: online “upload your image” readers

Search results are full of sites that decode QR codes — from their servers. You upload the screenshot (with your Wi-Fi password, your ticket, your correspondence visible around it), they return the text, and you trust their retention policy. For a public meme that is fine; for the cases that matter, it is the wrong direction.

Method 3: QR Code Scanner — files in, text out, offline

Download free — QrCodeScanner-Setup.exe

1. Save the picture that contains the code (screenshot, photo, download).
2. Add it to the app — one image or a whole batch — and press Decode.
3. Read the result: the payload with a type chip (URL, Wi-Fi, e-mail, phone, text); copy it with one click. No code in the image? You get an honest “no QR code found” instead of a hang.

The decoder is a pure-Dart port of ZXing — the open-source scanning library — running inside the app. No camera, no network, no account; it works with Wi-Fi switched off entirely.

Tips when a code won't decode

1. Use the original image — downscaled chat previews lose the module grid.
2. Crop closer — decoders need the code to fill a decent part of the frame.
3. Avoid screenshots of screenshots — every re-encode softens the contrast.
4. Mirrored codes (rare, from some selfie cameras) need an un-mirrored copy.

FAQ

Does Windows have a built-in QR code reader?

No. The nearest options are Phone Link workarounds or third-party tools; nothing in Explorer, Photos or the Snipping Tool reads QR codes.

Can it scan from the webcam?

No — deliberately. Desktop QR codes arrive as files; a file-based decoder is reliable and private. For live scanning, use a phone.

What about Wi-Fi QR codes?

They decode to the standard WIFI: payload, so the SSID and password become readable text — handy when a colleague sends a Wi-Fi code as a picture and you need the actual password fields.

More: how to make a QR code on Windows and how to see all devices on your Wi-Fi network.