QR Code & Barcodes · page 3

Parses BOLT 11 invoice prefixes, amounts, and expiry dates into readable summaries.

Formats user@domain Lightning addresses into wallet-payable QR targets.

Builds monero: URIs with address, amount, and description fields.

Formats paypal.me links with handle and optional amount for tips and invoices.

Formats Trustpilot review invitation URLs for packaging and receipt codes.

Builds write-a-review deep links with action=write-review for iOS rating codes.

Explains Apple Wallet pass.json barcode fields and message rotation for pass QRs.

Generates numbered table URLs like menu?table=12 in printable batches.

Designs numbered wristband ranges with checksum suffixes for festival gates.

Assembles IATA BCBP M1 bar-coded strings with passenger, flight, and seat fields.

Computes minimum module size in mm from scan distance using the distance-over-ten rule.

Computes four-module clear margins in mm and pixels for reliable finder detection.

Converts QR version and physical size into pixels per module for 150-1200 dpi printers.

Tabulates smallest reliable print sizes by version and error correction for handheld scanning.

Derives overall symbol width from version, module size, and quiet zone.

Checks luminance contrast between foreground and background against the 40 percent rule.

Computes the maximum centered logo area that error correction level H can still recover.

Converts four-module quiet zones into printer pixels at any DPI.

Explains when rounded dot modules stay scannable and how much corner rounding is safe.

Plans caption bands and call-to-action text around codes without breaking quiet zones.

Lays out A4 and letter posters with network name, password, and embedded join code.

Sizes folded table-tent panels holding Wi-Fi join codes for cafe tables.

Plans code placement and minimum size on 3.5x2 inch card stock.

Fits square codes inside circular stickers with module-size safety margins.