| Cover | Mar. 27, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 27, 2023 |
| Entity File Number | 000-56379 |
| Entity Registrant Name | NEXT-ChemX Corporation |
| Entity Central Index Key | 0001657045 |
| Entity Tax Identification Number | 32-0446353 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 901 Mopac Expressway South |
| Entity Address, Address Line Two | Building 1 |
| Entity Address, Address Line Three | Suite 300 |
| Entity Address, City or Town | Austin |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78746 |
| City Area Code | (512) |
| Local Phone Number | 663-2690 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | COMMON |
| Trading Symbol | CHMX |
