All tools · page 233

Lists pa, pn, am, cu, tn, and tr parameter rules with examples for UPI strings.

Splits IBANs into four-character print groups and validates length per country.

Assembles EMV BR Code strings with PIX key, amount, and merchant city plus computed CRC16.

Validates CPF, CNPJ, phone, email, and random-key formats used in PIX payloads.

Computes two-digit hex lengths and nesting for EMV QR data objects.

Computes the CRC-16/CCITT-FALSE checksum for tag 63 required by EMV and PIX codes.

Builds Thai PromptPay EMV strings from phone, national ID, or wallet proxies.

Builds Singapore PayNow EMV strings from UEN, mobile, or NRIC proxies.

Builds ERC-681 ethereum: payment targets with value, gas, and chain parameters.

Validates bech32 and bech32m checksums for SegWit-style crypto addresses before encoding.

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.

Produces Luhn-valid PANs from IIN prefixes for POS and payment-form test suites.

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.