What does the QR Code Scanner from Image do?
Use this tool when you need a browser utility that locates and decodes a QR matrix from a selected image. It accepts a local JPEG, PNG, WebP, or AVIF image containing a QR code and returns the exact decoded QR payload and detected QR version. Results are deterministic for the same input except where cryptographic randomness, current time, or a live provider response is part of the task.
Image scanning avoids camera permission
Use this page when the QR code already exists in a screenshot or file. A live camera scanner is faster for printed codes but requires camera permission and a separate privacy decision.
How do you use it?
- Choose a local image that contains one clear QR code.
- Select Scan QR code; the page checks normal and inverted pixels without requesting camera access.
- Read and copy the exact payload before deciding whether to open a decoded URL.
Worked example
Read a URL from a QR image
Input
PNG image containing a QR code for https://kitlumi.com/Output
https://kitlumi.com/The output is the encoded payload exactly as decoded; scanning does not visit the URL.
Common errors and fixes
| Symptom | Likely cause | Fix |
|---|---|---|
| No QR code was found. | The image is blurred, too small, cropped through the quiet zone, low contrast, or heavily distorted. | Use a sharper image with the full code and clear light margin visible. |
| The result is a suspicious or unexpected link. | A QR code can encode any text and does not authenticate its creator. | Inspect the complete hostname and scheme; do not open or sign in through an untrusted destination. |
Important behavior of QR Scanner
Treat decoded links as untrusted until you inspect their destination.
Standards and implementation references
- jsQR official repository (opens in a new tab)Documents the QR decoder used for normal and inverted image data.
- MDN — ImageData (opens in a new tab)Documents the pixel buffer supplied to the decoder.
Frequently asked questions about QR Scanner
Does the QR Scanner upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the QR Scanner accept?
It accepts a local JPEG, PNG, WebP, or AVIF image containing a QR code. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the QR Scanner produce?
It produces the exact decoded QR payload and detected QR version. Copy and download controls appear when the output format supports them.
What limitation should I know?
Treat decoded links as untrusted until you inspect their destination.
What changed?
Added Image-based QR scan, Normal and inverted codes, No camera permission, Local decoding, responsive controls, explicit runtime disclosure, and tested browser output.