| Cover | Apr. 21, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 21, 2023 |
| Entity File Number | 001-40747 |
| Entity Registrant Name | authID Inc. |
| Entity Central Index Key | 0001534154 |
| Entity Tax Identification Number | 46-2069547 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1385 S. Colorado Blvd. |
| Entity Address, Address Line Two | Building A |
| Entity Address, Address Line Three | Suite 322 |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80222 |
| City Area Code | 516 |
| Local Phone Number | 274-8700 |
| 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 | AUID |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | true |
