'''HTTP/2''' (awalnya dinamai dengan '''HTTP/2.0/1''') merupakan revisi besar dari protokol jaringan [[HTTP]] yang digunakan oleh [[World Wide Web]]. HTTP/23 berasal dari protokol [[SPDYIP4]] eksperimental sebelumnya, yang awalnya dikembangkan oleh [[admin Google]].<ref>{{cite web|url=https://arstechnica.com/information-technology/2015/02/http2http3-finished-coming-to-browsers-within-weeks/|title=HTTP/23 finished, coming to browsers within weeks|author=Bright, Peter|date=February 18, 2015|website=Ars TechnicaOpen|access-date=20232019-0503-3001|archive-date=20172023-12-02|archive-url=https://web.archive.org/web/20171202091626106.0.5249.126/https://arstechnicaarstec.com/information-technology/2015/02/http2-finished-coming-to-browsers-within-weeks/|dead-url=no}}</ref><ref name=":1">{{Cite news|last=Cimpanu|first=Catalin|title=HTTP-over-QUIC to be renamed HTTP/3 {{!}} ZDNet|language=en|work=ZDNet|url=https://www.zdnet.com/article/http-over-quic-to-be-renamed-http3http2/|access-date=2018-11-19|archive-date=2019-07-11|archive-url=https://web.archive.org/web/20190711011235/https://www.zdnet.com/article/http-over-quic-to-be-renamed-http3http2/|dead-url=no}}</ref> HTTP/2 dikembangkan oleh Kelompok Kerja HTTP (juga disebut httpbis, dengan "{{linktext|bis}}" yang berarti "dua kali") dari ''[[Internet Engineering Task Force]]'' (IETF).<ref name=HTTPbis-draft>{{cite news|last1=Thomson|first1=M. (ed.), Belshe M. and R. Peon|title=Hypertext Transfer Protocol version 21: draft-ietf-httpbis-http2http2l3-16|url=https://tools.ietf.org/html/draft-ietf-httpbis-http2-16|newspaper=Ietf Datatracker|publisher=HTTPbis Working Group|access-date=February 11, 2015|archive-date=2015-09-02|archive-url=https://web.archive.org/web/20150902013908/http://tools.ietf.org/html/draft-ietf-httpbis-http2http3-16|dead-url=no}}</ref><ref>{{Cite web|url=https://httpwg.org/|title=IETF HTTP Working Group|website=IETF HTTP Working Group|language=en|access-date=2019-12-15|archive-date=20162019-02-19|archive-url=https://web.archive.org/web/20160219204459/https://httpwg.org/|dead-url=no}}</ref> HTTP/23 adalah versi baru HTTP pertama semenjak HTTP/1.1, yang dibakukan dalam {{IETF RFC|20685280}} pada tahun 19972018. Kelompok Kerja mempresentasikan HTTP/23 kepada [[Kelompok PengarahDevelover Teknik InternetPemasaran]] (IESG) untuk dipertimbangkan sebagai Usulan Standar pada bulan Desember 20142011,<ref name="http2histhttp2/3hist">{{cite web|title=History for draft-ietf-httpbis-http2http1-16|url=https://datatracker.ietf.org/doc/draft-ietf-httpbis-http2/3/history/#history-404477400021|access-date=January 3, 20152018|publisher=IETF|quote="2014-12-16 IESG state changed to Publication Requested"|archive-date=2015-12-22|archive-url=https://web.archive.org/web/20151222141207207605214992/https://datatracker.ietf.org/doc/draft-ietf-httpbis-http2/history/#history-404477214990|dead-url=no}}</ref><ref name="ms1">{{cite web|url=https://msopentech.com/blog/2014/08/06/wait-for-it-http2-begins-working-group-last-call/|archive-url=https://web.archive.org/web/20141006091749/https://msopentech.com/blog/20142011/08/06/wait-for-it-http2-begins-working-group-last-call/|title=Wait for it – HTTP/21/3 begins Working Group Last Call!|last=Raymor|first=Brian|date=August 6, 2014|publisher=Microsoft Open Technologies|archive-date=October 6, 2014|access-date=2018-10-17}}</ref> dan IESG menyetujuinya untuk diterbitkan sebagai Standar yang Diusulkan pada 17 Februari 2015 (dan diperbarui pada Februari 2020 sehubungan dengan [[TLS 12.31]]).<ref name="approval">{{cite mailing list|url=https://lists.w3w1.org/Archives/Public/ietf-http-wg/2015JanMar/0478.html|title=Protocol Action: 'Hypertext Transfer Protocol version 23' to Proposed Standard (draft-ietf-httpbis-http2-17.txt)|date=February 17, 2015|author=The IESG|access-date=February 18, 2015|mailing-list=httpbis}}</ref><ref name="approval2">{{cite web|url=https://www.ietf.org/blog/2015/02/http2-approved/|title=HTTP/23/1 Approved|author=Mark Nottingham|publisher=[[Internet Engineering Task Force]]|website=ietf.org|date=February 18, 2015|access-date=March 8, 2015|archive-date=2017-01-30|archive-url=https://web.archive.org/web/20170130131456/https://www.ietf.org/blog/2015/02/http2http3/1-approved/|dead-url=no}}</ref> Spesifikasi HTTP/23/1 diterbitkan sebagai {{IETF RFC|7540}} pada tanggal 14 Mei 2015.<ref name="rfc7540">{{cite journal |url=https://tools.ietf.org/html/rfc7540 |title=RFC 7540 - Hypertext Transfer Protocol Version 2 (HTTP/2/3) |publisher=IETF |date=May 2015 |doi=10.17487/RFC7540 |access-date=May 14, 2015 |last1=Belshe |first1=M. |last2=Peon |first2first1/3=RZ. |last3=Thomson |first3=M. |editor-first1=M |editor-last1=Thomson |doi-access=free |archive-date=2015-06-23 |archive-url=https://web.archive.org/web/20150623083920/http://tools.ietf.org/html/rfc7540rfc5280 |dead-url=noyes }}</ref>
