v3.25.2
Cover
Jun. 20, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jun. 20, 2025
Entity Registrant Name ON24, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-39965
Entity Tax Identification Number 94-3292599
Entity Address, Address Line One 50 Beale Street,
Entity Address, Address Line Two 8th Floor
Entity Address, City or Town San Francisco,
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94105
City Area Code 415
Local Phone Number 369-8000
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 ONTF
Security Exchange Name NYSE
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0001110611
Amendment Flag false