Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity File Number	0-21683
Entity Registrant Name	hopTo Inc.
Entity Central Index Key	0001021435
Entity Tax Identification Number	13-3899021
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	189 North Main St.
Entity Address, Address Line Two	Suite 102
Entity Address, City or Town	Concord
Entity Address, State or Province	NH
Entity Address, Postal Zip Code	03301
City Area Code	(800)
Local Phone Number	472-7466
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 3,969,777
Entity Common Stock, Shares Outstanding		18,850,675
Auditor Firm ID	3501
Auditor Name	dbbmckennon
Auditor Location	Newport Beach, California