| Document and Entity Information | Nov. 07, 2024 |
| Cover [Abstract] | |
| Security 12b Title | Class A Common Stock, par value $0.0001 per share |
| Amendment Flag | false |
| Entity Central Index Key | 0001802156 |
| Document Type | 8-K |
| Document Period End Date | Nov. 07, 2024 |
| Entity Registrant Name | XPONENTIAL FITNESS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40638 |
| Entity Tax Identification Number | 84-4395129 |
| Entity Address, Address Line One | 17877 Von Karman Ave. |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Irvine |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92614 |
| City Area Code | (949) |
| Local Phone Number | 346-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Trading Symbol | XPOF |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
