Cover - USD ($)	12 Months Ended
	Sep. 30, 2021	Dec. 27, 2021	Mar. 31, 2021
Cover [Abstract]
Entity Registrant Name	CYTTA CORP.
Entity Central Index Key	0001383088
Document Type	10-K
Amendment Flag	false
Entity Voluntary Filers	No
Current Fiscal Year End Date	--09-30
Entity Well Known Seasoned Issuer	No
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Sep. 30, 2021
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Entity Common Stock Shares Outstanding		302,486,627
Entity Public Float			$ 25,297,367
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes