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Taiwan ID numbers, invoice codes, year systems — quick checks for daily life.
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LOCAL
ROC / Gregorian Year Converter
Convert between Taiwan ROC (民國) and Gregorian years instantly in either direction — for tax forms, government applications, health insurance paperwork, and historical documents. Runs locally.
Local
LOCAL
Uniform Invoice Validator
Validate any 8-digit Taiwan tax ID (統一編號 / 統編) checksum locally — supports the standard rule and the 7-prefix special-case used by the Ministry of Finance. Useful for accounting, e-invoice reconciliation, and B2B onboarding.
Local
LOCAL
Year System Converter
Cross-reference Gregorian, ROC, Japanese era, and Buddhist years.
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