Chinese uppercase numerals (大写金额: 壹贰叁肆伍陆柒捌玖拾佰仟万亿) are the anti-tampering way to write money amounts on Chinese invoices, receipts, cheques and contracts, ending with 元 (yuan), 角 (jiao, 0.1), 分 (fen, 0.01) and 整 (exactly). This converter supports amounts up to hundreds of billions (千亿) with two decimal places and negative amounts (prefixed 负).
It follows the standard accounting zero rules: consecutive zeros collapse into a single 零, trailing zeros are dropped, an empty wan/yi group inserts one 零 (100000001 → 壹亿零壹元整), and a zero jiao with a non-zero fen writes 零 after 元 (120000.03 → 壹拾贰万元零叁分). Everything runs locally in your browser — no amount ever leaves your device.