diff --git a/assets/chezmoi.io/docs/reference/templates/functions/fromJsonc.md b/assets/chezmoi.io/docs/reference/templates/functions/fromJsonc.md
new file mode 100644
index 00000000000..eff5aafa907
--- /dev/null
+++ b/assets/chezmoi.io/docs/reference/templates/functions/fromJsonc.md
@@ -0,0 +1,5 @@
+# `fromJsonc` *jsonctext*
+
+`fromJsonc` parses *jsonctext* as JSONC using
+[`github.com/tailscale/hujson`](https://github.com/tailscale/hujson) and returns
+the parsed value.
diff --git a/assets/chezmoi.io/docs/user-guide/manage-different-types-of-file.md b/assets/chezmoi.io/docs/user-guide/manage-different-types-of-file.md
index 578f6a9b8d0..7f1f59b880f 100644
--- a/assets/chezmoi.io/docs/user-guide/manage-different-types-of-file.md
+++ b/assets/chezmoi.io/docs/user-guide/manage-different-types-of-file.md
@@ -86,8 +86,8 @@ contents of the file.
     {{- .chezmoi.stdin | replaceAllRegex "old" "new" }}
     ```
 
-    To set individual values in JSON, TOML, and YAML files you can use the
-    `setValueAtPath` template function, for example:
+    To set individual values in JSON, JSONC, TOML, and YAML files you can use
+    the `setValueAtPath` template function, for example:
 
     ```
     {{- /* chezmoi:modify-template */ -}}
diff --git a/assets/chezmoi.io/mkdocs.yml b/assets/chezmoi.io/mkdocs.yml
index d38472776c0..82fc4eeb347 100644
--- a/assets/chezmoi.io/mkdocs.yml
+++ b/assets/chezmoi.io/mkdocs.yml
@@ -182,6 +182,7 @@ nav:
       - encrypt: reference/templates/functions/encrypt.md
       - eqFold: reference/templates/functions/eqFold.md
       - fromIni: reference/templates/functions/fromIni.md
+      - fromJsonc: reference/templates/functions/fromJsonc.md
       - fromToml: reference/templates/functions/fromToml.md
       - fromYaml: reference/templates/functions/fromYaml.md
       - glob: reference/templates/functions/glob.md
diff --git a/pkg/cmd/config.go b/pkg/cmd/config.go
index 77a81812e44..4a4fc2be7ac 100644
--- a/pkg/cmd/config.go
+++ b/pkg/cmd/config.go
@@ -369,6 +369,7 @@ func newConfig(options ...configOption) (*Config, error) {
 		"encrypt":                  c.encryptTemplateFunc,
 		"eqFold":                   c.eqFoldTemplateFunc,
 		"fromIni":                  c.fromIniTemplateFunc,
+		"fromJsonc":                c.fromJsoncTemplateFunc,
 		"fromToml":                 c.fromTomlTemplateFunc,
 		"fromYaml":                 c.fromYamlTemplateFunc,
 		"gitHubKeys":               c.gitHubKeysTemplateFunc,
diff --git a/pkg/cmd/templatefuncs.go b/pkg/cmd/templatefuncs.go
index c05a141d86d..f20f1f5ae36 100644
--- a/pkg/cmd/templatefuncs.go
+++ b/pkg/cmd/templatefuncs.go
@@ -140,6 +140,14 @@ func (c *Config) fromIniTemplateFunc(s string) map[string]any {
 	return iniFileToMap(file)
 }
 
+func (c *Config) fromJsoncTemplateFunc(s string) any {
+	var data any
+	if err := chezmoi.FormatJSONC.Unmarshal([]byte(s), &data); err != nil {
+		panic(err)
+	}
+	return data
+}
+
 func (c *Config) fromTomlTemplateFunc(s string) any {
 	var data any
 	if err := chezmoi.FormatTOML.Unmarshal([]byte(s), &data); err != nil {
diff --git a/pkg/cmd/testdata/scripts/templatefuncs.txtar b/pkg/cmd/testdata/scripts/templatefuncs.txtar
index 6f6dc86caf2..12fd9ccd018 100644
--- a/pkg/cmd/testdata/scripts/templatefuncs.txtar
+++ b/pkg/cmd/testdata/scripts/templatefuncs.txtar
@@ -23,6 +23,11 @@ cmp stdout golden/deleteValueAtPath
 exec chezmoi execute-template '{{ eqFold "foo" "Foo" "FOO" }}'
 stdout '^true$'
 
+# test fromJsonc template function
+stdin golden/example.jsonc
+exec chezmoi execute-template --with-stdin '{{ fromJsonc .chezmoi.stdin | toJson }}'
+stdout '{"key":1}'
+
 # test glob template function
 exec chezmoi execute-template '{{ glob "*.txt" | join "\n" }}{{ "\n" }}'
 cmp stdout golden/glob
@@ -191,6 +196,10 @@ echo '</plist>'
 # line2
 -- golden/deleteValueAtPath --
 {"a":{"b":{"d":2}}}
+-- golden/example.jsonc --
+{
+  "key": 1, // Comment
+}
 -- golden/expected --
 255
 -- golden/glob --