| Document and Entity Information Document | Dec. 09, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 9, 2021 |
| Entity Registrant Name | Ziff Davis, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 0-25965 |
| Entity Tax Identification Number | 47-1053457 |
| Entity Address, Address Line One | 114 5th Avenue, |
| Entity Address, Address Line Two | 15th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10011 |
| City Area Code | 212 |
| Local Phone Number | 503-3500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | ZD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001084048 |
| Amendment Flag | false |
