diff --git a/runtime/ftplugin/jsonld.vim b/runtime/ftplugin/jsonld.vim
new file mode 100644
index 0000000000..bb4dde21c2
--- /dev/null
+++ b/runtime/ftplugin/jsonld.vim
@@ -0,0 +1,10 @@
+" Vim filetype plugin
+" Language:	JSON-LD
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2026 Aug 06
+
+if exists('b:did_ftplugin')
+  finish
+endif
+
+runtime! ftplugin/json.vim
diff --git a/runtime/indent/jsonld.vim b/runtime/indent/jsonld.vim
new file mode 100644
index 0000000000..96b9b06146
--- /dev/null
+++ b/runtime/indent/jsonld.vim
@@ -0,0 +1,6 @@
+" Vim indent file
+" Language:	JSON-LD
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2026 Aug 06
+
+runtime! indent/json.vim
diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index c3331d53c4..727c2b0601 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -725,6 +725,7 @@ local extension = {
   json5 = 'json5',
   jsonc = 'jsonc',
   jsonl = 'jsonl',
+  jsonld = 'jsonld',
   jsonnet = 'jsonnet',
   libsonnet = 'jsonnet',
   jsp = 'jsp',
diff --git a/runtime/makemenu.vim b/runtime/makemenu.vim
index d9f5d671bd..c74bba6d84 100644
--- a/runtime/makemenu.vim
+++ b/runtime/makemenu.vim
@@ -1,6 +1,6 @@
 " Script to define the syntax menu in synmenu.vim
 " Maintainer:		The Vim Project <https://github.com/vim/vim>
-" Last Change:		2026 Aug 03
+" Last Change:		2026 Aug 06
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " This is used by "make menu" in the src directory.
@@ -382,6 +382,7 @@ SynMenu HIJK.JJdescription:jjdescription
 SynMenu HIJK.Jovial:jovial
 SynMenu HIJK.JQ:jq
 SynMenu HIJK.JSON.JSON:json
+SynMenu HIJK.JSON.JSON-LD:jsonld
 SynMenu HIJK.JSON.JSON5:json5
 SynMenu HIJK.JSON.JSONC:jsonc
 SynMenu HIJK.Julia:julia
diff --git a/runtime/synmenu.vim b/runtime/synmenu.vim
index 7152eaf3ee..1f1a8bc25e 100644
--- a/runtime/synmenu.vim
+++ b/runtime/synmenu.vim
@@ -2,7 +2,7 @@
 " This file is normally sourced from menu.vim.
 "
 " Maintainer:		The Vim Project <https://github.com/vim/vim>
-" Last Change:		2025 Mar 09
+" Last Change:		2026 Aug 06
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " Define the SetSyn function, used for the Syntax menu entries.
@@ -369,20 +369,21 @@ an 50.50.780 &Syntax.HIJK.JJdescription :cal SetSyn("jjdescription")<CR>
 an 50.50.790 &Syntax.HIJK.Jovial :cal SetSyn("jovial")<CR>
 an 50.50.800 &Syntax.HIJK.JQ :cal SetSyn("jq")<CR>
 an 50.50.810 &Syntax.HIJK.JSON.JSON :cal SetSyn("json")<CR>
-an 50.50.820 &Syntax.HIJK.JSON.JSON5 :cal SetSyn("json5")<CR>
-an 50.50.830 &Syntax.HIJK.JSON.JSONC :cal SetSyn("jsonc")<CR>
-an 50.50.840 &Syntax.HIJK.Julia :cal SetSyn("julia")<CR>
-an 50.50.850 &Syntax.HIJK.Just :cal SetSyn("just")<CR>
-an 50.50.870 &Syntax.HIJK.Karel :cal SetSyn("karel")<CR>
-an 50.50.880 &Syntax.HIJK.Kconfig :cal SetSyn("kconfig")<CR>
-an 50.50.890 &Syntax.HIJK.KDE\ script :cal SetSyn("kscript")<CR>
-an 50.50.900 &Syntax.HIJK.Kdl :cal SetSyn("kdl")<CR>
-an 50.50.910 &Syntax.HIJK.Kimwitu++ :cal SetSyn("kwt")<CR>
-an 50.50.920 &Syntax.HIJK.Kitty :cal SetSyn("kitty")<CR>
-an 50.50.930 &Syntax.HIJK.Kivy :cal SetSyn("kivy")<CR>
-an 50.50.940 &Syntax.HIJK.KixTart :cal SetSyn("kix")<CR>
-an 50.50.950 &Syntax.HIJK.Kotlin :cal SetSyn("kotlin")<CR>
-an 50.50.960 &Syntax.HIJK.Krl :cal SetSyn("krl")<CR>
+an 50.50.820 &Syntax.HIJK.JSON.JSON-LD :cal SetSyn("jsonld")<CR>
+an 50.50.830 &Syntax.HIJK.JSON.JSON5 :cal SetSyn("json5")<CR>
+an 50.50.840 &Syntax.HIJK.JSON.JSONC :cal SetSyn("jsonc")<CR>
+an 50.50.850 &Syntax.HIJK.Julia :cal SetSyn("julia")<CR>
+an 50.50.860 &Syntax.HIJK.Just :cal SetSyn("just")<CR>
+an 50.50.880 &Syntax.HIJK.Karel :cal SetSyn("karel")<CR>
+an 50.50.890 &Syntax.HIJK.Kconfig :cal SetSyn("kconfig")<CR>
+an 50.50.900 &Syntax.HIJK.KDE\ script :cal SetSyn("kscript")<CR>
+an 50.50.910 &Syntax.HIJK.Kdl :cal SetSyn("kdl")<CR>
+an 50.50.920 &Syntax.HIJK.Kimwitu++ :cal SetSyn("kwt")<CR>
+an 50.50.930 &Syntax.HIJK.Kitty :cal SetSyn("kitty")<CR>
+an 50.50.940 &Syntax.HIJK.Kivy :cal SetSyn("kivy")<CR>
+an 50.50.950 &Syntax.HIJK.KixTart :cal SetSyn("kix")<CR>
+an 50.50.960 &Syntax.HIJK.Kotlin :cal SetSyn("kotlin")<CR>
+an 50.50.970 &Syntax.HIJK.Krl :cal SetSyn("krl")<CR>
 an 50.60.100 &Syntax.L.Lace :cal SetSyn("lace")<CR>
 an 50.60.110 &Syntax.L.LambdaProlog :cal SetSyn("lprolog")<CR>
 an 50.60.120 &Syntax.L.Latte :cal SetSyn("latte")<CR>
diff --git a/runtime/syntax/jsonld.vim b/runtime/syntax/jsonld.vim
new file mode 100644
index 0000000000..3b933b0ec2
--- /dev/null
+++ b/runtime/syntax/jsonld.vim
@@ -0,0 +1,31 @@
+" Vim syntax file
+" Language:	JSON-LD
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2026 Aug 06
+" Reference:	https://www.w3.org/TR/json-ld11/
+
+if !exists('main_syntax')
+  if exists('b:current_syntax')
+    finish
+  endif
+  let main_syntax = 'jsonld'
+endif
+
+runtime! syntax/json.vim
+unlet! b:current_syntax
+
+" Match reserved keywords only when they occupy a complete JSON string.  The
+" negative lookbehind excludes an escaped quote inside a longer string.
+syn match jsonldKeyword /\C\%(\\"\)\@<!"\@<=@\%(base\|container\|context\|direction\|graph\|id\)\ze"/ contained containedin=jsonKeyword,jsonString
+syn match jsonldKeyword /\C\%(\\"\)\@<!"\@<=@\%(import\|included\|index\|json\|language\|list\)\ze"/ contained containedin=jsonKeyword,jsonString
+syn match jsonldKeyword /\C\%(\\"\)\@<!"\@<=@\%(nest\|none\|prefix\|propagate\|protected\|reverse\)\ze"/ contained containedin=jsonKeyword,jsonString
+syn match jsonldKeyword /\C\%(\\"\)\@<!"\@<=@\%(set\|type\|value\|version\|vocab\)\ze"/ contained containedin=jsonKeyword,jsonString
+
+hi def link jsonldKeyword SpecialChar
+
+let b:current_syntax = 'jsonld'
+if main_syntax ==# 'jsonld'
+  unlet main_syntax
+endif
+
+" vim: ts=8
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index c4e2a572b0..ee52075079 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -431,6 +431,7 @@ func s:GetFilenameChecks() abort
     \ 'json5': ['file.json5'],
     \ 'jsonc': ['file.jsonc', '.babelrc', '.eslintrc', '.jsfmtrc', '.jshintrc', '.jscsrc', '.vsconfig', '.hintrc', '.swrc', 'jsconfig.json', 'osquery.conf', 'tsconfig.json', 'tsconfig.test.json', 'tsconfig-test.json', '.luaurc', 'bun.lock', expand("$HOME/.config/VSCodium/User/settings.json"), '/home/user/.config/waybar/config' ],
     \ 'jsonl': ['file.jsonl'],
+    \ 'jsonld': ['file.jsonld'],
     \ 'jsonnet': ['file.jsonnet', 'file.libsonnet'],
     \ 'jsp': ['file.jsp'],
     \ 'julia': ['file.jl'],