| Cover | Mar. 05, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 05, 2025 |
| Entity File Number | 001-40809 |
| Entity Registrant Name | NEXTNRG, INC. |
| Entity Central Index Key | 0001817004 |
| Entity Tax Identification Number | 84-4260623 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 67 NW 183rd Street |
| Entity Address, City or Town | Miami |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33169 |
| City Area Code | (305) |
| Local Phone Number | 791-1169 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | NXXT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
