| Cover | Aug. 20, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Entity Ex Transition Period | false |
| Document Period End Date | Aug. 20, 2024 |
| Entity Registrant Name | 1stdibs.com, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 94-3389618 |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10010 |
| Entity Address, Address Line One | 300 Park Avenue South, 10th Floor |
| Entity Address, City or Town | New York |
| Local Phone Number | 627-3929 |
| City Area Code | 212 |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Entity Central Index Key | 0001600641 |
| Amendment Flag | false |
| Entity File Number | 001-40453 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Trading Symbol | DIBS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
