Was macht QR Code Scanner?
QR Code Scanner hilft dabei, Daten zu untersuchen. Die Verarbeitung erfolgt im Browser und Grenzen werden klar beschrieben. Geprüfte Funktionen: Image-based QR scan, Normal and inverted codes, No camera permission, Local decoding.
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.
Wie wird es verwendet?
- 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.
Echtes Ein- und Ausgabebeispiel
Read a URL from a QR image
Eingabe
PNG image containing a QR code for https://kitlumi.com/Ausgabe
https://kitlumi.com/The output is the encoded payload exactly as decoded; scanning does not visit the URL.
Häufige Fehler und Korrekturen
| Symptom | Wahrscheinliche Ursache | Korrektur |
|---|---|---|
| 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
Konkrete Grenze dieses Werkzeugs: Treat decoded links as untrusted until you inspect their destination.
Standards und Implementierungsquellen
- 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.
QR Scanner — FAQ
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.
Was wurde geändert?
Inhaltliche Aktualisierung: QR Scanner: Added Image-based QR scan, Normal and inverted codes, No camera permission, Local decoding, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.