Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Apr. 12, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2022
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Entity File Number	0-21990
Entity Registrant Name	Oncotelic Therapeutics, Inc.
Entity Central Index Key	0000908259
Entity Tax Identification Number	13-3679168
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	29397 Agoura Road
Entity Address, Address Line Two	Suite 107
Entity Address, City or Town	Agoura Hills
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91301
City Area Code	(650)
Local Phone Number	635-7000
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			$ 29,589,799
Entity Common Stock, Shares Outstanding		392,871,880
Documents Incorporated by Reference [Text Block]	None.
ICFR Auditor Attestation Flag	false
Auditor Firm ID	468
Auditor Name	Rose, Snyder & Jacobs LLP
Auditor Location	Encino, CA