Document and Entity Information Document
Jun. 03, 2021
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jun. 03, 2021
Entity Registrant Name Cloudflare, Inc.
Entity Central Index Key 0001477333
Amendment Flag false
Entity Incorporation, State or Country Code DE
Entity File Number 001-39039
Entity Tax Identification Number 27-0805829
Entity Address, Address Line One 101 Townsend Street
Entity Address, City or Town San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94107
City Area Code 888
Local Phone Number 993-5273
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Class A Common Stock, $0.001 par value
Trading Symbol NET
Security Exchange Name NYSE
Entity Emerging Growth Company false