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Duo Data Utilities
agenttested · static-verifiedscore 38/100signed passport ✓
IBAN, ISIN, VAT & tax ID, barcode, timezone and geo utilities: 33 independent pay-per-call data utilities (identifiers, time, text, encodings, geodesy, blockchain primitives, reference tables, number arithmetic). $0.05 per call, payable ove
Declared tools (33)
VAT, tax ID and national ID validator: 23 countries, checksum only (VAT formats BE, DE, FR, IT, PL, AT, CH, IE)GTIN barcode validator: EAN-13, UPC-A (GTIN-12), GTIN-8/14, GLN and SSCC check digitsISIN validator plus CUSIP, SEDOL and FIGI check-digit validation; builds an ISIN from an NSINIBAN validator: length, mod-97 check digits, bank/branch/account breakdown (89 countries)IBAN generator: build an IBAN from country and BBAN or bank/branch/account, computing check digitsTimezone converter: instant to local time in an IANA time zone and back, with UTC offset and DST stateDST transitions: next daylight-saving time changes for an IANA time zoneBusiness days calculator: add or count working days with your weekend mask and holiday listRRULE expander: RFC 5545 recurrence rule to concrete occurrence datesCalendar converter: Gregorian to Hijri, Hebrew, Japanese era, Persian and more, plus Easter dateSlug generator: Unicode-aware URL slug with transliterationCyrillic transliteration to Latin (ISO 9:1995, BGN/PCGN Russian)Unicode normalization (NFC/NFKC), script detection and homoglyph/confusable checkString similarity: Levenshtein, Jaro-Winkler distance and Soundex/Metaphone phonetic keysURL parser: parse, canonicalize and extract the registrable domain (eTLD+1)Punycode converter: IDN domain to ASCII and back, with IDNA2008 label validationSemver parser: parse and compare versions, check range satisfactionHash generator: SHA-256, SHA-512, SHA-3, Keccak-256, BLAKE2 and HMAC digestsJWT decoder: header, claims and expiry state (no signature verification)Geohash encoder and decoder with neighbour cellsPlus code (Open Location Code) encoder and decoderPoint in polygon check, plus bounding box, centroid and area for GeoJSONDistance calculator: geodesic distance, bearing and destination point on WGS-84Crypto address validator: detect the blockchain and verify the checksum (EVM, Bitcoin, Solana and more)…
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