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Ultra QR Engine — Controls

All features unbranded. Watermark appears only if you provide watermark text. For best logo results, upload SVG or PNG with transparent background.

QR Type URL / Link Plain Text Phone Email Wi-Fi (SSID;PASS;WPA) vCard (JSON)

Input (link / text / phone / email / wifi / vcard JSON)

Render size (px)

Margin

Dot style Square Rounded Dots Extra Rounded Diamond

EC level LMQH

Module colors (gradient)

Vertical Horizontal Diagonal

Background

FillContainCover

Logo (optional)

SquareCircle

Use SVG/PNG transparent for best result. Keep logo < 25% for scan reliability (with EC=H).

Watermark / Copyright (Optional — appears only if provided)

Bottom-RightCenterTop-Left

Presets

If you plan to embed on Blogger / restricted hosts, package local copies of the external JS files (qr-code-styling, html2canvas, FileSaver) into a ZIP and instruct the buyer to host the JS locally.

Diagnostics & logs

Ultra • QR Engine

Ready

Rendered size: —

Export: PNG / SVG (high-res)

Note: Watermark appears only when watermark text is provided. For best print quality use SVG export.