This website
The demos on this site run entirely in your browser. They use:
| Component | Used for | Licence |
|---|---|---|
| jsQR | Decoding the codes in the scan test and the gallery demo, in your browser. | Apache License 2.0 |
| QR Code generator library (Project Nayuki) | The reference this site's QR encoder follows. | MIT License |
Everything else on the site — the layout, the styles, the demos, the renderer — is our own code, served from this domain with no third-party scripts, no trackers and no cookies.
The app
QR Craft for Android is built with Flutter and the open-source packages below. Each links to its page on pub.dev, where its licence text is published in full.
| Package | What it does |
|---|---|
| mobile_scanner | Reads codes from the camera and from images. |
| qr_flutter · qr | QR encoding and rendering. |
| sqflite · path · path_provider | The on-device database and file locations. |
| provider · shared_preferences | App state and preferences. |
| image_picker · image_cropper · image | Choosing, cropping and processing images. |
| image_gallery_saver · share_plus | Saving to the gallery and sharing. |
| Print-ready PDF export for cards and standees. | |
| flutter_contacts | Saving a scanned contact, with your permission. |
| url_launcher | Opening links, UPI apps and the store. |
| google_fonts · flutter_colorpicker | Typography and the colour pickers. |
| audioplayers · permission_handler | Scan feedback sounds and permission flows. |
| google_mobile_ads · in_app_purchase | Ads on the free plan, and Premium. |
| firebase_core · firebase_remote_config · in_app_update | Remote settings and the Play update flow. |
| http · uuid · intl · package_info_plus | Network calls, identifiers, formatting and version info. |
Fonts
- DM Sans — the app's and this site's text face. SIL Open Font License 1.1.
- Fraunces — the display face used for headlines here and in the store artwork. SIL Open Font License 1.1.
Both are self-hosted on this domain as subset WOFF2 files; no font is fetched from a third party.
Notes
If you believe a component is missing from this page or attributed incorrectly, write to contact@epsilondevelopers.xyz and we will correct it.
“QR Code” is a registered trademark of DENSO WAVE INCORPORATED.