Generators

Random postal addresses with street, city, region and postcode for the United States, the United Kingdom, Germany, France and Russia.

Generate Code 128 or EAN-13 barcodes as PNG.

Generate ISO 9362 BIC/SWIFT codes: a four-letter bank code, a two-letter country, a two-character location and an optional three-character branch.

Test card numbers for Visa, Mastercard, American Express, Discover, JCB and Diners Club with the correct IIN prefix, length and Luhn check digit.

Generate Bitcoin P2PKH, Ethereum and Tron addresses with the correct version byte, Base58Check encoding or EIP-55 checksum.

EAN-13, UPC-A and EAN-8 barcodes with a valid GS1 check digit, plus the check-digit computation shown step by step.

Build an HTML email signature in a classic, modern or minimal layout from a name, role, company and contact details.

Render a PNG favicon at 16, 32, 48, 64, 128 or 256 pixels from a background colour, a foreground colour, a letter or an emoji, and a shape.

Every registered HTTP status code with its RFC 9110 reason phrase, its category and a one-line meaning.

Generate ISO 13616 IBANs for 24 countries with the correct length, the national BBAN structure and valid MOD-97-10 check digits.

Check an IBAN: country length, character set, BBAN structure and the MOD-97-10 check, with the bank code and account number extracted where the layout is known.

Fifteen-digit IMEIs with a valid Luhn check digit and a TAC prefix, plus the sixteen-digit IMEISV variant with its software version.

ISO 6166 ISINs with a two-letter country, a nine-character NSIN and the check digit computed over the letter-expanded value.

Emit a complete open-source licence text — MIT, Apache-2.0, GPL, LGPL, AGPL, MPL, BSD, ISC, Unlicense, CC0, CC-BY or BSL — with the year and copyright holder filled in.

MAC-48 and EUI-64 addresses, including the locally-administered and multicast variants, with a selectable OUI prefix and separator.

Emit the meta block of a page together with its Open Graph and Twitter Card tags from a single form.

Generate compact URL-safe identifiers with a custom alphabet and length.

Build a web app manifest with name, start URL, scope, display mode, orientation, colours, icons, categories and screenshots.

Encode any text or URL into a PNG QR code.

Build a robots.txt with user-agent, allow, disallow, crawl-delay and sitemap rules.

Generate US ABA routing numbers with the weighted 3-7-1 checksum, or validate one you already have.

Emit a valid RSS 2.0 or Atom 1.0 feed from channel metadata and a list of items, with correctly formatted dates.

Build an XML sitemap from a list of URLs.

Build schema.org JSON-LD for Article, Product, Organization, Person, Event, BreadcrumbList, FAQPage or LocalBusiness ready to paste into a page.

Validate taxpayer identifiers of nine countries — US EIN and SSN, UK UTR, French SIREN and SIRET, German tax number and USt-IdNr, Spanish NIF and NIE, Italian codice fiscale and partita IVA, Canadian SIN, Australian ABN and Indian GSTIN — with the format, the checksum and the parsed parts.

Generate individual or company tax identification numbers with valid checksums for the United States, the United Kingdom, France, Germany, Spain, Italy, Canada, Australia and India.

Generate lexicographically sortable ULIDs (48-bit timestamp, 80-bit randomness).

Generate UUIDs: v4 random, v7 time ordered and v1 timestamp based.

Generate European VAT numbers for 28 countries with the national prefix, structure and check digits.

Check the format and checksum of a European VAT number offline. This is a format check only and never a VIES lookup.

Seventeen-character ISO 3779 vehicle identification numbers with the check digit in position nine and a decodable WMI, VDS and VIS split.