| Cover | Apr. 20, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 20, 2022 |
| Entity File Number | 001-41031 |
| Entity Registrant Name | Bluejay Diagnostics, Inc. |
| Entity Central Index Key | 0001704287 |
| Entity Tax Identification Number | 47-3552922 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 360 Massachusetts Avenue |
| Entity Address, Address Line Two | Suite 203 |
| Entity Address, City or Town | Acton |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01720 |
| City Area Code | (844) |
| Local Phone Number | 327-7078 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | BJDX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
