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Japan Postal Code Search & Reverse Lookup (Code ⇄ Address)

Instantly search over 120,000 Japanese postal codes for free — look up an address from a postal code, or a postal code from an address. Supports CSV export and one-click copying of results.

Municipality Search (Japan)

Search over 1,700 Japanese municipalities by map or keyword. Find population, households, area, and prefecture ranking for each city, town, and village.

Bank Code & Branch Code Lookup

Search bank codes and branch codes for banks across Japan. Search by bank name, branch name, place name, or look up by code number.

IBAN Validator (International Bank Account Number Checker)

Free IBAN validator that checks the ISO 13616 checksum and country-specific length in your browser. Breaks the IBAN down into country code, check digits, and BBAN. Nothing is sent to a server.

VIN Decoder (VIN Check & Check Digit Validator)

Free VIN Decoder for any 17-character Vehicle Identification Number: validate the ISO 3779 check digit, look up the country of manufacture and known manufacturer from the WMI, and estimate the model year. Runs entirely i...

Barcode Check Digit Validator & Calculator (UPC/EAN/GTIN)

Free tool to validate and calculate the check digit of UPC-A, EAN-8, EAN-13, and GTIN-14 barcodes. Enter the full number to validate it, or the digits without the check digit to calculate and append the correct one. Runs...

ISBN Check Digit Calculator & ISBN-10/13 Converter

Free tool to validate and calculate ISBN-10 and ISBN-13 check digits. Enter 9, 10, 12, or 13 digits and the tool automatically detects the format, then shows the converted ISBN-10/13 equivalent. Runs entirely in your bro...

Routing Number Checker (ABA Validator)

Free tool to validate and calculate the check digit of a US bank ABA routing number (the 9-digit code used for bank transfers). Enter 8 or 9 digits and it auto-detects the format, plus looks up the Federal Reserve Distri...

Canada SIN Check Digit Validator (Social Insurance Number)

Free tool to validate and calculate the check digit of a Canadian Social Insurance Number (SIN). Enter 8 or 9 digits and it auto-detects the format, verifies the checksum with the Luhn algorithm (mod 10), and identifies...

Brazil CPF Check Digit Validator & Calculator

Free tool to validate and calculate the check digits of Brazil's CPF (Cadastro de Pessoas Físicas) taxpayer registry number. Works with either 9 or 11 digits, automatically detecting which you've entered, and runs the tw...

Chile RUT Check Digit Calculator (Rol Único Tributario Validator)

Free calculator to validate and calculate the check digit of Chile's RUT (Rol Único Tributario), the national tax ID for individuals and companies. Enter just the body to calculate the check digit (a digit or 'K'), or en...

Country & Region Code List (ISO Codes, Calling Codes, Currencies)

Look up ISO 3166-1 codes (alpha-2/alpha-3), international calling codes, ISO 4217 currency codes, and capital cities for all 195 countries and territories. Search instantly by name, code, or capital.

Phone Number Formatter (E.164 & International Format)

Instantly format any phone number into E.164, international, and national formats for free. Validates the number and detects whether it is a mobile or landline. Everything runs locally in your browser — nothing is sent t...

Airport Code Lookup (IATA & ICAO Codes)

Free tool to search IATA (3-letter) and ICAO (4-letter) codes for 226 major airports worldwide. Search by airport name, city, or country to quickly check codes for flight bookings, cargo and international mail slips, or...

Port Code Lookup (UN/LOCODE)

A free tool to search UN/LOCODEs (United Nations trade and transport location codes) for 197 major world ports. Search by port name or country as well, handy for checking codes when preparing invoices or bills of lading,...