List of URI schemes

This article lists common URI schemes. A Uniform Resource Identifier helps identify a source without ambiguity. Many URI schemes are registered with the IANA; however, there exist many unofficial URI schemes as well. Mobile deep links are one example of a class of unofficial URI schemes that allow for linking directly to a specific location in a mobile app.

Official IANA-registered schemes

The official URI schemes registered with the IANA are as follows (note that "IETF Draft" in no way is a finalized specification and must not be treated so; refer to Section 2.2 of RFC 2026 for more details):

Scheme	Purpose	Status	Defined by	General format	Notes
aaa aaas	Diameter Protocol	Permanent	RFC 3588 RFC 6733	aaa[s]://<host>[:<port>][;transport=<transport>][;protocol=<protocol>] example: aaa://host.example.com:1813;transport=udp;protocol=radius
about	Displaying product information and internal information	Permanent	RFC 6694	See about URI scheme for more details.	Widely used by web browsers, sometimes even providing interactive resources. Individual vendors modify this scheme: for instance, the Opera web browser forwards to their opera: scheme instead and Chrome uses chrome:.
acap	Application Configuration Access Protocol	Permanent	RFC 2244	acap://[<user>[;AUTH=<type>]@]<host>[:<port>]/<entry>	URL scheme used within the ACAP protocol for the "subdataset" attribute, referrals and inheritance
acct	Identifying user account	Permanent	RFC 7565
acr	Anonymous Customer Reference	Provisional	IANA registration template Open Mobile Alliance
adiumxtra	Direct installation of Adium Xtras (plugins).	Provisional	IANA registration template The Adium Team	adiumxtra://www.adiumxtras.com/download/0000	0000 refers to a specific Xtra
afp	Accessing Apple Filing Protocol shares	Provisional	IANA registration template IETF Draft	over TCP/IP afp://[<user>@]<host>[:<port>][/[<path>]] over AppleTalk afp:/at/[<user>@]<host>[:<zone>][/]
afs	Andrew File System global file names	Provisional	RFC 1738
aim	Controlling AOL Instant Messenger.	Provisional	IANA registration template AOL	aim:<function>?<parameters>	Functions include goim, addbuddy, and buddyicon.
apt	Experimental method of installing software using APT.	Provisional	IANA registration template	apt:<package name>	Commonly found on websites which contain Debian software repositories.
attachment	Attaching resources to MHTML pages	Provisional	IANA registration template	attachment:/<resource number>/<filename>	Opera-specific
aw	Link to an Active Worlds world	Provisional	IANA registration template Activeworlds Inc.	aw://<worldserver host>:<worldserver port>/<worldname>	Mostly found in HTTP referers when users open a website from within an Active Worlds world.
amss	Identifier for an AMSS broadcast	Provisional	ETSI TS 103 270	amss:<sid>
barion	Send e-money to a Barion e-money wallet	Provisional	IANA registration template Barion URI scheme	barion:<target>[?[amount=<amount>][&][currency=<currency>][&][comment=<comment>][&][sender=<sender>][&][type=purchase|charity|p2p]]	Used by Barion mobile apps.
beshare	Open a search query on a BeShare server	Provisional	IANA registration template BeShare source code	beshare://<servername>/<query>	Mostly used internally, with variants.
bitcoin	Send money to a Bitcoin address	Provisional	IANA registration template Bitcoin URI Scheme	bitcoin:<address>[?[amount=<size>][&][label=<label>][&][message=<message>]]
blob	Binary data access in browsers	Provisional	IANA registration template W3C
bolo	Join an existing bolo game.	Provisional	IANA registration template	bolo://<hostname>/	Mostly passed via IRC or via tracker servers.
callto	Launching Skype call (see also skype:)	Provisional	IANA registration template old version of IETF Draft	callto:<screenname> or callto:<phonenumber> [1]	Introduced with Microsoft NetMeeting. Works with current version of Skype with Internet Explorer, Opera and Safari
cap	Calendar access protocol	Permanent	RFC 4324	generic syntax	URL scheme used to designate both calendar stores and calendars accessible using the CAP protocol
chrome	Specifies user interfaces built using XUL in Mozilla-based browsers.	Provisional	IANA registration template Mozilla	chrome://<package>/<section>/<path> (Where <section> is either "content", "skin" or "locale")	Works only in Mozilla-based browsers such as Firefox, SeaMonkey and Netscape. Not related to the Google Chrome browser.
chrome	Used for the management of Google Chrome's settings. In contrast with other browsers, its preferences appear as web-pages instead of dialog boxes.	Provisional	IANA registration template Google	chrome://<settings>/<path>/[<specificSetting>]	Works only in Google Chrome and Chromium.
chrome-extension	Manage the settings of extensions which have been installed.	Provisional	IANA registration template Google	chrome-extension://<extensionID>/<pageName>.html (Where <extensionID> is the ID given to the extension by "Chrome Web Store" and <pageName> is the location of an HTML page)	Works only in Google Chrome and Chromium.
com-eventbrite-attendee		Provisional	IANA registration template
cid	Referencing individual parts of an SMTP/MIME message	Permanent	RFC 2111 RFC 2392	cid:<content-id>	e.g. referencing an attached image within a formatted e-mail. (See also mid:)
coap coaps	Constrained Application Protocol	Permanent	RFC 7252	coap[s]://<host>[:<port>]/<path>[?<query>]	Identify CoAP resources and provide a means of locating the resource.
content	Accessing an Android content provider.	Provisional	IANA registration template Open Handset Alliance	content://provider/<path>	Performs a query on an Android Content Provider
crid	TV-Anytime Content Reference Identifier	Permanent	RFC 4078	crid://<host>/<data>	Allow references to scheduled publications of broadcast media content.
cvs	Provides a link to a Concurrent Versions System (CVS) Repository	Provisional	IANA registration template Concurrent Versions System	cvs://<method:logindetails>@<repository>/<modulepath>;[date=date to retrieve | tag=tag to retrieve]
dab	Identifier for a DAB broadcast	Provisional	ETSI TS 103 270	dab:<gcc>.<eid>.<sid>.<scids>[.<uatype>]
data	Inclusion of small data items inline	Permanent	RFC 2397	data:<mediatype>[;base64],<data>
dav	HTTP Extensions for Distributed Authoring (WebDAV)	Permanent	RFC 2518 RFC 4918	dav:	Used for internal identifiers only; WebDAV itself addresses resources using the http: and https: schemes. [2]
dict	Dictionary service protocol	Permanent	RFC 2229	dict://<user>;<auth>@<host>:<port>/d:<word>:<database>:<n> dict://<user>;<auth>@<host>:<port>/m:<word>:<database>:<strat>:<n>	refer to definitions or word lists available using the DICT protocol
dlna-playsingle dlna-playcontainer		Provisional	IANA registration template IANA registration template
dns	Domain Name System	Permanent	RFC 4501	dns:[//<host>[:<port>]/]<dnsname>[?<dnsquery>] examples: dns:example?TYPE=A;CLASS=IN dns://192.168.1.1/ftp.example.org?type=A	designates a DNS resource record set, referenced by domain name, class, type, and, optionally, the authority
dntp	Direct Network Transfer Protocol	Provisional	IANA registration template
doi	Digital object identifier, a digital identifier for any object of intellectual property.	Provisional	IETF Draft	doi:10.<publisher number>/<suffix> example: doi:10.1000/182	Used e.g. for most scientific publications. Can be resolved via HTTP (transformed into a URL) by prepending https://doi.org/ or http://hdl.handle.net/ in front.
drm	Identifier for a DRM broadcast	Provisional	ETSI TS 103 270	drm:<sid>[.<appdomain>.<uatype>]
dtn	DTNRG research and development	Provisional	RFC 5050
dvb		Provisional	IETF Draft
ed2k	Resources available using the eDonkey2000 network	Provisional	IANA registration template eDonkey2000	ed2k://|file|<filename>|<size of file>|<hash of file>|/ or ed2k://|server|<host>|<port>|/	Links to servers are also possible, as are additional parameters. Official documentation from eDonkey2000 website at the Wayback Machine (archive index)
example	For examples	Permanent	RFC 7595	example:<anything>
facetime	FaceTime is a video conferencing software developed by Apple for iPhone 4, the fourth generation iPod Touch, and computers running Mac OS X.	Provisional	IANA registration template Apple Inc.	facetime://<address>|<MSISDN>|<mobile number> example: facetime://+19995551234	Apple has not published documentation on this protocol yet.
fax	Used for telefacsimile numbers	Historical	RFC 2806 RFC 3966	fax:<phonenumber>	Deprecated in RFC 3966 in favour of tel:.
feed	web feed subscription	Provisional	IANA registration template	feed:<absolute_uri> or feed://<hierarchical part> examples: feed://example.com/rss.xml feed:https://example.com/rss.xml	See Feed URI scheme for a detailed overview of common implementations, supported software, and critics.
file	Addressing files on local or network file systems	Permanent	RFC 1738 RFC 3986 RFC 8089	file://[host]/path or (RFC 3986) file:[//host]/path	Since this is usually used for local files the host from RFC 1738 is often empty leading to a starting triple /. RFC 3986 allows an absolute path with no host part.
filesystem	Abandoned part of File API	Historical	IANA registration template
finger	Querying user information using the Finger protocol	Provisional	IANA registration template IETF Draft	finger://host[:port][/<request>]
fish	Accessing another computer's files using the SSH protocol	Provisional	IANA registration template fish KDE kioslave	fish://[<username>[:<password>]@]<hostname>[:<port>]	See Files transferred over shell protocol for details about the protocol.
fm	Identifier for an FM broadcast	Provisional	ETSI TS 103 270	fm:<gcc>.<pi>.<frequency>
ftp	FTP resources	Permanent	RFC 1738 IETF Draft Old IETF Draft	generic syntax
gemini	Used with the Gemini protocol	Provisional	Provisional specification	generic syntax but without the userinfo subcomponent
geo	A Uniform Resource Identifier for Geographic Locations	Permanent	RFC 5870	geo:<lat>,<lon>[,<alt>][;u=<uncertainty>] (for WGS-84)	Other coordinate reference systems (including those for non-terrestrial globes, such as The Moon and Mars) will be supported, once registered.
gg	Starting chat with Gadu-Gadu user	Provisional	IANA registration template Gadu-Gadu	gg:<userid>
git	Provides a link to a GIT repository	Provisional	IANA registration template Git	GitHub example: git://github.com/user/project-name.git
gizmoproject	Gizmo5 calling link.	Provisional	IANA registration template	gizmoproject://call?id=<gizmo_id>	May use sip:// instead of gizmoproject:// in recent versions of Gizmo5.
go	Common Name Resolution Protocol	Permanent	RFC 3368	go://[<host>]?[<common-name>]*[;<attribute>=[<type>,]<value>] or go:<common-name>*[;<attribute>=[<type>,]<value>]
gopher	Used with Gopher protocol	Permanent	RFC 4266	gopher://<host>:<port>/<item type><path>
gtalk	Start a chat with a Google Talk user	Provisional	IANA registration template Google Talk	gtalk:chat?jid=example@gmail.com	See Google Talk, XMPP, and http://juberti.blogspot.com/2006/11/gtalk-uri.html for more information
h323	Used with H.323 multimedia communications	Permanent	RFC 3508	h323:[<user>@]<host>[:<port>][;<parameters>]
hcp	Displaying a help page on Microsoft Windows Help and Support Center.	Provisional	IANA registration template Microsoft	hcp://system/<File>.htm (Where <File> is the file to load)	Works only on Windows XP. Later replaced by ms-help:.
http	HTTP resources	Permanent	RFC 1738 RFC 2616 (makes RFC 2068 obsolete) RFC 7230	generic syntax
https	HTTP connections secured using SSL/TLS	Permanent	RFC 2817 RFC 7230	generic syntax
iax	Inter-Asterisk eXchange protocol version 2	Permanent	RFC 5456	iax:[<username>@]<host>[:<port>][/<number>[?<context>]] examples iax:[2001:db8::1]:4569/alice?friends iax:johnQ@example.com/12022561414
icap	Internet Content Adaptation Protocol	Permanent	RFC 3507
icon		Provisional	IETF Draft
im	Instant messaging protocol	Permanent	RFC 3860	im:<username>@<host>, and also im:sip:<username>@<host> for MS Communicator launching	Works as xmpp: URI for single user chat sessions.
imap	Accessing e-mail resources through IMAP	Permanent	RFC 2192 RFC 5092	imap://[<user>[;AUTH=<type>]@]<host>[:<port>]/<command>
info	Information Assets with Identifiers in Public Namespaces	Permanent	RFC 4452
iotdisco	Identify things on Internet of Things	Provisional	IANA registration template
ipn		Provisional	RFC 6260
ipp	Internet Printing Protocol	Permanent	RFC 3510
ipps	Internet Printing Protocol over HTTPS	Permanent	RFC 7472
irc	Connecting to an Internet Relay Chat server to join a channel.	Provisional	IANA registration template IETF Draft Old IETF Draft	irc://<host>[:<port>]/[<channel>[?<password>]]	Assuming the client knows a server associated with the name, "host" may optionally be an IRC network name.
irc6	IPv6 equivalent of irc	Provisional	IANA registration template	irc6://<host>[:<port>]/[<channel>[?<password>]]	See irc
ircs	Secure equivalent of irc	Provisional	IANA registration template IETF Draft	ircs://<host>[:<port>]/[<channel>[?<password>]]	See irc
iris iris.beep iris.xpc iris.xpcs iris.lws	Internet Registry Information Service	Permanent	RFC 3981 RFC 3983 RFC 4992 RFC 4992 RFC 4993
itms	Used for connecting to the iTunes Music Store	Provisional	IANA registration template Apple Inc	itms:
jabber		Permanent	IANA registration template
jar	Compressed archive member	Provisional	IANA registration template Java API	jar:<url>!/[<entry>]	Works for any ZIP based file.
jms	Java Message Service	Provisional	RFC 6167
keyparc	Keyparc encrypt/decrypt resource.	Provisional	IANA registration template Bloombase	keyparc://encrypt/<username>/<uri> or keyparc://decrypt/<username>/<uri>
lastfm	Connecting to a radio stream from Last.fm.	Provisional	IANA registration template Last.fm	lastfm://<radio_stream> or lastfm://globaltags/<genre> or lastfm://user/<username>/<stuff>
ldap	LDAP directory request	Permanent	RFC 2255 RFC 4516	ldap://[<host>[:<port>]][/<dn> [?[<attributes>][?[<scope>][?[<filter>][?<extensions>]]]]] example: ldap://ldap1.example.net:6666/o=University%20of%20Michigan, c=US??sub?(cn=Babs%20Jensen)
ldaps	Secure equivalent of ldap	Provisional	IANA registration template Old version of IETF Draft	ldaps://[<host>[:<port>]][/<dn> [?[<attributes>][?[<scope>][?[<filter>][?<extensions>]]]]]	Not an IETF standard, but commonly used in applications.
magnet	"magnet links"	Provisional	IANA registration template Magnet-URI Project	magnet:?xt=urn:sha1:<hash of file>&dn=<display name> (other parameters are also possible)	Used by various peer-to-peer clients, usually providing the hash of a file to be located on the network.
mailserver	Access to data available from mail servers	Historical	RFC 6196
mailto	SMTP e-mail addresses and default content	Permanent	RFC 6068	mailto:<address>[?<header1>=<value1>[&<header2>=<value2>]] example: mailto:jsmith@example.com?subject=A%20Test&body=My%20idea%20is%3A%20%0A	Headers are optional, but often include subject=; body= can be used to pre-fill the body of the message.
maps	"map links"	Provisional	IANA registration template	maps:q=<physical location>	Some mobile web browsers will launch a dedicated mapping application. See also "geo:" (RFC 5870)
market	Opens Google Play	Provisional	IANA registration template Android [3]	market://details?id=Package_name or market://search?q=Search_Query or market://search?q=pub:Publisher_Name	Supported by Android devices
message	Direct link to specific email message	Provisional	IANA registration template Apple Inc [4]	message:<MESSAGE-ID> message://<MESSAGE-ID>	Supported by Mail since OS X 10.5
mid	Referencing SMTP/MIME messages, or parts of messages.	Permanent	RFC 2111 RFC 2392	mid:<message-id>[/<content-id>]	(See also cid:)
mms	Windows streaming media	Provisional	IANA registration template Microsoft	mms://<host>:<port>/<path>	Used by Windows Media Player to stream audio and/or video.
modem		Historical	RFC 2806 RFC 3966		Deprecated in RFC 3966 in favour of tel:.
ms-help	Displaying a help page on Microsoft Windows Help and Support Center. Used by Windows Vista and later.	Provisional	IANA registration template Microsoft	ms-help://<section>/<path>/<file>.htm (Where <section> is a library of help files – the name of the library begins with "MS.", <path> is the sub-libraries, and <file> is the name of the file)	Works only on Windows Vista and later.
ms-settings ms-settings-airplanemode ms-settings-bluetooth ms-settings-camera ms-settings-cellular ms-settings-cloudstorage ms-settings-emailandaccounts ms-settings-language ms-settings-location ms-settings-lock ms-settings-nfctransactions ms-settings-notifications ms-settings-power ms-settings-privacy ms-settings-proximity ms-settings-screenrotation ms-settings-wifi ms-settings-workplace	Settings application in Windows	Provisional	IANA registration templates
msnim	Adding a contact, or starting a conversation in Windows Live Messenger	Provisional	IANA registration template Windows Live Messenger	Add a contact to the buddy list msnim:add?contact=nada@example.com Start a conversation with a contact msnim:chat?contact=nada@example.com Start a voice conversation with a contact msnim:voice?contact=nada@example.com Start a video conversation with a contact msnim:video?contact=nada@example.com	Can be invoked from a web page or via a run command or an Internet Explorer browser URL (won't work with Firefox 2.0.0.8). For web pages use this HTML: <a href="chat?contact=nada@example.com">Click to chat!</a>
msrp msrps	Message Session Relay Protocol	Permanent	RFC 4975
mtqp	Message Tracking Query Protocol	Permanent	RFC 3887
mumble	Joining a server.	Provisional	IANA registration template Mumble	mumble://[username[:password]@]<address>[:port]/[channelpath]?version=<serverversion>[&title=<servername>][&url=<serverurl>]	Official documentation from Mumble website
mupdate	Mailbox Update Protocol	Permanent	RFC 3656
mvn	Access Apache Maven repository artifacts	Provisional	IANA registration template OPS4J	mvn:org.ops4j.pax.web.bundles/service/0.2.0-SNAPSHOT mvn:http://user:password@repository.ops4j.org/maven2!org.ops4j.pax.web.bundles/service/0.2.0
news	(Usenet) newsgroups and postings	Permanent	RFC 1738 RFC 5538	news:<newsgroupname> or news:<message-id>	References a particular resource, regardless of location.
nfs	Network File System resources	Permanent	RFC 2224	generic syntax
ni nih	Naming Things with Hashes	Permanent	RFC 6920	ni://<authority>/<algorithm>;<hash-value>?<tag1>=<value1>&<tag2>=<value2>	Identify a digital object using the output from a hash function
nntp	Usenet NNTP	Permanent	RFC 1738 RFC 5538	nntp://<host>:<port>/<newsgroup-name>/<article-number>	Referencing a specific host is often less useful than referencing the resource generically, as NNTP servers are not always publicly accessible
notes	Open a Lotus Notes document or database	Provisional	IANA registration template Lotus Notes	notes://<address>	Used by IBM Lotus Notes to refer to documents and databases stored within the Lotus Notes system. When clicked in a browser on a computer with Lotus Notes client installed, Notes will open the document link as if a Notes DocLink were clicked within Notes.
oid		Provisional	IANA registration template IETF Draft
opaquelocktoken		Permanent	RFC 2518 RFC 4918
openpgp4fpr	Used to identify OpenPGP version 4 public keys.	Provisional	IANA registration template Metacode	openpgp4fpr:<fingerprint>
pack		Historical	IANA registration template IETF Draft
palm	Used to designate system services in HP webOS applications	Provisional	IANA registration template HP webOS	palm:<servicename>[/<method>]]/	Official documentation from HP webOS Services Overview
paparazzi	Used to launch and automatically take a screen shot using the application "Paparazzi!" (Mac only)	Provisional	IANA registration template Derailer	paparazzi:[<options>]http:[//<host>[:[<port>][<transport>]]/	Official documentation from the Paparazzi! website
payto	Designate target for payments	Provisional	RFC 8905	payto://<authority>/<receiver>[?<options>] examples: payto://iban/DE75512108001245126199?amount=EUR:200.0&message=hello payto://bic/SOGEDEFFXXX payto://void/?amount=EUR:10.5
pkcs11	PKCS #11	Permanent	RFC 7512
platform	Access to Eclipse platform resources.	Provisional	IANA registration template Eclipse platform scheme documentation	platform:/(resource|plugin|fragment|meta|config|base)/...	Registered with java.net.URL when launching with the org.eclipse.core.filesystem bundle, and heavily leveraged by org.eclipse.emf.common.util.URI.
pop	Accessing mailbox through POP3	Permanent	RFC 2384	pop://[<user>[;AUTH=<auth>]@]<host>[:<port>]
pres	Used in Common Profile for Presence (CPP) to identify presence	Permanent	RFC 3859	pres:<address>[?<header1>=<value1>[&<header2>=<value2>]]	Similar to "mailto:"
prospero	Prospero Directory Service	Historical	RFC 1738 RFC 4157
proxy	Alter proxy settings in the FoxyProxy application	Provisional	IANA registration template FoxyProxy	proxy:<option>=<value>[&<option>=<value>[&...]]	Official documentation from FoxyProxy website
psyc	Used to identify or locate a person, group, place or a service and specify its ability to communicate	Provisional	IANA registration template PSYC	psyc:[//<host>[:[<port>][<transport>]]/[<object-name>][#<channel-name>]	Official documentation from PSYC website
query	Opens a filesystem query	Provisional	IANA registration template Haiku	query:<queryformula>	Implemented by the url_wrapper application
redis rediss	Redis database	Provisional	IANA registration template IANA registration template
reload	REsource LOcation And Discovery Protocol	Permanent	RFC 6940	reload://<destination>@<overlay>/[<specifier>]
res	Used by Internet Explorer to display error pages when the server doesn't have its own customized error pages, or when there is no response from the server (in case which the server wasn't found, like when the server is down or the domain isn't registered or when there is no Internet connection, or in case of a timeout).	Provisional	IANA registration template Microsoft	res://ieframe.dll/<File> (Where <File> is the file to load)	Works only in Internet Explorer.
resource	Creating mapping for resource protocol aliases generted by the resource instruction. Used by Firefox.	Provisional	IANA registration template Mozilla	resource://<aliasname>/ (Where <aliasname> is the name of the aliase)	Works only in Firefox.
rmi	Look up a Java object in an RMI registry.	Provisional	IANA registration template Sun	rmi://<host>[:<port>]/<object-name>	URI scheme understood by JNDI. Can be used to look up a remote Java object within an RMI registry (typically for the purposes of RMI on that object). Host/port in the URI are of the rmiregistry process, not the remote object.
rsync	rsync	Provisional	RFC 5781	rsync://<host>[:<port>]/<path>
rtmfp	Real Time Media Flow Protocol	Provisional	IANA registration template RFC 7425	rtmfp://<host>/<application>/<media>
rtmp	Real Time Messaging Protocol	Provisional	IANA registration template Adobe Systems	rtmp://<host>/<application>/<media>	URI schema used to connect to Adobe Flash Media Server.
rtsp	Real Time Streaming Protocol	Permanent	RFC 2326
s3	Amazon S3 bucket	Permanent	aws-cli documentation	s3://mybucket/puppy.jpg
secondlife	Open the Map floater in Second Life application to teleport the resident to the location.	Provisional	IANA registration template Linden Lab	secondlife://<region name>/<x position>/<y position>/<z position>	Used by SLurl.com. Knowledge base article.
service		Permanent	RFC 2609
session	Media Resource Control Protocol	Permanent	RFC 4463 RFC 6787	session:<content-id> example: session:help@root-level.store
sftp	SFTP file transfers (not be to confused with FTPS (FTP/SSL))	Provisional	IANA registration template IETF Draft	sftp://[<user>[;fingerprint=<host-key fingerprint>]@]<host>[:<port>]/<path>/<file>
sgn	Social Graph Node Mapper	Provisional	IANA registration template Google	example: sgn://social-network.example.com/?ident=bob	Official documentation from sgnodemapper project.
shc	SMART Health Cards Framework	Provisional	IANA registration template	shc:<digit-string>	User and technical documentation at SMARTHealth.cards. Initially used in QR code images to present proof of COVID-19 vaccination.
shttp	Secure HTTP	Permanent	RFC 2660		Largely superseded by HTTPS.
sieve	ManageSieve protocol	Permanent	RFC 5804
sip	Used with Session Initiation Protocol (SIP)	Permanent	RFC 2543 RFC 3969 RFC 3261	sip:<user>[:<password>]@<host>[:<port>][;<uri-parameters>][?<headers>] examples: sip:alice@atlanta.com?subject=project%20x&priority=urgent sip:+1-212-555-1212:1234@gateway.com;user=phone
sips	Secure equivalent of sip	Permanent	RFC 3969 RFC 3261	sips:<user>[:<password>]@<host>[:<port>][;<uri-parameters>][?<headers>]
skype	Launching Skype call (see also callto:)	Provisional	IANA registration template Skype	skype:<username|phonenumber>[?[add|call|chat|sendfile|userinfo]]
smb	Accessing SMB/CIFS shares	Provisional	IANA registration template IETF Draft	smb://[<user>@]<host>[:<port>][/[<path>]][?<param1>=<value1>[;<param2>=<value2>]] or smb://[<user>@]<workgroup>[:<port>][/] or smb://[[<domain>;]<username>[:<password>]@]<server>[:<port>][/[<share>[/[<path>]]][?[<param>=<value>[<param2>=<value2>[...]]]]] example: smb://workgroup;user:password@server/share/folder/file.txt
sms	Interact with SMS capable devices for composing and sending messages.	Permanent	RFC 5724	sms:<phone number>?<action> examples: sms:+15105550101?body=hello%20there sms:+15105550101,+15105550102?body=hello%20there	Should be used as a subset to the tel: schema.
snews	NNTP over SSL/TLS	Historical	RFC 5538
snmp	Simple Network Management Protocol	Permanent	RFC 4088	snmp://[user@]host[:port][/[<context>[;<contextEngineID>]][/<oid>]] examples: snmp://example.com//1.3.6.1.2.1.1.3+ snmp://tester5@example.com:8161/bridge1;800002b804616263
soap.beep soap.beeps		Permanent	RFC 3288 RFC 4227
soldat	Joining servers	Provisional	IANA registration template Soldat	soldat://<host>:<port>/[password] example: soldat://127.0.0.1:23073/thatssecret!	Official note in Manual
spotify	Load a track, album, artist, search, or playlist in Spotify	Provisional	IANA registration template Spotify	spotify:<artist|album|track>:<id> or spotify:search:<text> or spotify:user:<username>:playlist:<id> example: spotify:track:2jCnn1QPQ3E8ExtLe6INsx	Informally specified in Spotify official blog post by CTO Andreas Ehn.
ssh	SSH connections (like telnet:)	Provisional	IANA registration template IETF Draft	ssh://[<user>[;fingerprint=<host-key fingerprint>]@]<host>[:<port>]
steam	Interact with Steam: install apps, purchase games, run games, etc.	Provisional	IANA registration template Steam, Valve	steam:<command line arguments> or steam://<action>/<id, addon, IP, hostname, etc.>	Official documentation from Valve Developer Community website
stun stuns	Session Traversal Utilities for NAT (STUN)	Permanent	RFC 7064	stun[s]:<host>[:<port>]
svn	Provides a link to a Subversion (SVN) source control repository	Provisional	IANA registration template Subversion	svn[+ssh]://<logindetails>@<repository><:port>/<modulepath>
tag	tag URI scheme	Permanent	RFC 4151	tag:<email/domainname>,<date>:<Item>	Represented entities do not necessarily have to be accessible electronically.
teamspeak	Joining a server.	Provisional	IANA registration template TeamSpeak	teamspeak://<server>[:<port>]/[?<parameter1>=<value1>[&<parameter2>=<value2>]]	Official documentation from TeamSpeak Website
tel	Used for telephone numbers	Permanent	RFC 5341 RFC 3966 RFC 2806	tel:<phonenumber>
telnet	Used with telnet	Permanent	RFC 1738 RFC 4248	telnet://<user>:<password>@<host>[:<port>/]
tftp	Trivial File Transfer Protocol	Permanent	RFC 3617
things	Interact with Things: create new to-dos or go to a specific list	Provisional	IANA registration template Cultured Code	things:command?parameter1=value1&parameter2...	Works in iOS or OS X if Things by Cultured Code is installed. Complete documentation
thismessage	multipart/related relative reference resolution	Permanent	IANA registration template RFC 2557
tn3270	Interactive 3270 emulation sessions	Permanent	RFC 6270
tip	Transaction Internet Protocol	Permanent	RFC 2371
turn turns	Traversal Using Relays around NAT (TURN)	Permanent	RFC 7065	turn[s]:<host>[:<port>][?transport=<transport>]
tv	TV Broadcasts	Permanent	RFC 2838
udp	BitTorrent tracker protocol based on UDP.	Provisional	IANA registration template BitTorrent	udp://<server>[:<port>]/	Documentation: UDP tracker protocol
udp	MPEG Transport Stream over UDP	Provisional	IANA registration template MPEG-TS	udp://[<localaddress>@]<destination|multicastgroup>[:<port>]	Supported by FFmpeg, VLC and other common video streaming applications and appliances. Each UDP packet typically contains 1 to 7 188 byte TS packets with no additional headers or footers.
unreal	Joining servers	Provisional	IANA registration template Unreal	unreal://<server>[:<port>]/	Unreal legacy "protocol"
urn	Uniform Resource Names	Permanent	RFC 2141	urn:<namespace>:<specificpart>	Commonly used with namespace 'uuid'. See URN Namespaces.
ut2004	Joining servers	Provisional	IANA registration template Unreal Tournament 2004	ut2004://<server>[:<port>][/<map>?<options>]	Documentation from Unreal Developer Network
vemmi	Versatile Multimedia Interface	Permanent	RFC 2122
ventrilo	Joining a server.	Provisional	IANA registration template Ventrilo	ventrilo://<server>[:<port>]/[?<parameter1>=<value1>[&<parameter2>=<value2>]]	Official documentation from Ventrilo Website
videotex		Historical	IANA registration template IETF Draft RFC 2122 RFC 3986
view-source	Shows a web page as code 'in the raw'.	Provisional	IANA registration template IETF Draft	view-source:<absolute-URI> where <absolute-URI> is specified in RFC 3986. Example: view-source:http://en.wikipedia.org/wiki/URI_scheme	See view-source URI scheme for details.
vnc	Virtual Network Computing	Permanent	RFC 7869	vnc://[<host>[:<port>]][?<params>]
wais	Used with Wide area information server (WAIS)	Historical	RFC 1738 RFC 4156	wais://<host>:<port>/<database>[?<search>] or wais://<host>:<port>/<database>/<wtype>/<wpath>
webcal	Subscribing to calendars in iCalendar format	Provisional	IANA registration template iCalendar	webcal://<hierarchical part> example: webcal://example.com/calendar.ics	HTTP as a transport protocol is assumed. See Webcal for details.
ws wss	WebSocket protocol	Permanent	RFC 6455	ws:<hierarchical part>
wtai	Wireless Telephony Application Interface	Provisional	IANA registration template WAP Forum	wtai://wp/mc/+18165551212	See Application Protocol Wireless Application Environment Specification Version 1.1 for details.
wyciwyg	What You Cache Is What You Get WYCIWYG	Provisional	IANA registration template Mozilla	wyciwyg://<URI>	See WYCIWYG for details.
xcon xcon-userid		Permanent	RFC 6501
xfire	Adding friends and servers, joining servers, changing status text.	Provisional	IANA registration template Xfire	xfire:<function>[?<parameter1>=<value1>[&<parameter2>=<value2>]]	Official documentation from Xfire website
xmlrpc.beep xmlrpc.beeps		Permanent	RFC 3529
xmpp	XMPP	Permanent	RFC 4622 RFC 5122	xmpp:[<user>]@<host>[:<port>]/[<resource>][?<query>]
xri	eXtensible Resource Identifier (XRI)	Provisional	IANA registration template OASIS XRI Technical Committee	xri://<authority>[/[<path>]][?<query>][#fragment]	Official documentation from OASIS XRI Technical Committee
ymsgr	Sending an instant message to a Yahoo! Contact.	Provisional	IANA registration template Yahoo! Messenger	ymsgr:sendIM?<screenname>
z39.50	Z39.50 information access	Historical	RFC 1738 RFC 2056
z39.50r	Z39.50 retrieval	Permanent	RFC 2056	z39.50r://<host>[:<port>]/<database>?<docid>[;esn=<elementset>][;rs=<recordsyntax>]
z39.50s	Z39.50 session	Permanent	RFC 2056	z39.50s://<host>[:<port>]/[<database>][?<docid>][;esn=<elementset>][;rs=<recordsyntax>]

Unofficial but common URI schemes

Scheme	Purpose	Defined by	General format	Notes
admin	URL scheme in the GNOME desktop environment to access file(s) with administrative permissions with GUI applications in a safer way, instead of the insecure-considered sudo, gksu & gksudo.	GNOME Virtual file system	admin:/<path>/<to>/<file> example: gedit admin:/etc/default/grub	See more information on: [5]
app	URL scheme can be used by packaged applications to obtain resources that are inside a container.	Google	app://<application>/<path> example: app://com.foo.bar/index.html	See more information on: [6] [7]
javascript	Execute JavaScript code	IETF Draft	javascript:<javascript to execute>
jdbc	Connect a database with Java Database Connectivity technology.	Database vendor dependent	jdbc:somejdbcvendor:other_data... jdbc:oracle:oci:@host:port(sid or [/service])?params... jdbc:sqlserver://serverName\instanceName:portNumber;params... jdbc:mysql://host:port/database?params...	Requires a vendor provided connector (jar archive) to be included in the client library.
msteams	Used by Microsoft to launch the Microsoft Teams desktop client	Microsoft	msteams:/l/...
odbc	Open Database Connectivity	IETF Draft
rdar	URL scheme used by Apple's internal issue-tracking system.	Apple (not public)	rdar://<issue number>example: rdar://10198949	Allows employees to link to internally-tracked issues from anywhere. Example of a private scheme which has leaked in to the public space and is widely seen on the internet, but can only be resolved by Apple employees.
trueconf:	Used by TrueConf Server to interact with client applications	[8]	trueconf:[target][@server]&[param_1]=[value_1]&[...]&[param_n]=[value_n]	See more information at [9]
slack	Used by Slack to launch the Slack client	Slack API reference	slack://open?team={TEAM_ID}
stratum	Connectivity URI for the Stratum protocol, used for proof-of-work coordination in pooled cryptocurrency mining.	Stratum Protocol Draft	stratum+tcp://server:port, stratum+udp://server:port	This protocol has completely superseded the now-obsolete Getwork protocol, and was created primarily to reduce network overhead as mining pool sizes inevitably scale upwards.
web+...	Effectively namespaces web-based protocols from other, potentially less web-secure, protocols.	This convention is defined within the HTML Living Standard specification	web+⟨string of some lower-case alphabetic characters⟩:	This convention is not associated with the registration of any new scheme but is currently a requirement as well as convention for non-whitelisted web-based protocols.
zoommtg, zoomus	Used by Zoom conferencing software to launch the Zoom client	Zoom developer community	zoommtg://zoom.us/join?confno=<confno>...	See more information at Zoom developer community

External links

• Official IANA Registry of URI Schemes
• More information, including many more schemes