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Document and Entity Information
Jan. 10, 2022
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jan. 10, 2022
Entity Registrant Name PLIANT THERAPEUTICS, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-39303
Entity Tax Identification Number 47-4272481
Entity Address, Address Line One 260 Littlefield Avenue
Entity Address, City or Town South San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94080
City Area Code 650
Local Phone Number 481-6770
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001746473
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol PLRX
Security Exchange Name NASDAQ