diff --git a/files/en-us/web/api/htmlelement/contenteditable/index.md b/files/en-us/web/api/htmlelement/contenteditable/index.md
index 096ddfc77bc3298..231e1e276e1ab6d 100644
--- a/files/en-us/web/api/htmlelement/contenteditable/index.md
+++ b/files/en-us/web/api/htmlelement/contenteditable/index.md
@@ -16,6 +16,7 @@ This enumerated attribute can have the following values:
 
 - '`true`' indicates that the element is `contenteditable`.
 - '`false`' indicates that the element cannot be edited.
+- '`plaintext-only`' indicates that the element's raw text is editable, but rich text formatting is disabled.
 - '`inherit`' indicates that the element inherits its parent's editable
   status.
 
diff --git a/files/en-us/web/html/global_attributes/contenteditable/index.md b/files/en-us/web/html/global_attributes/contenteditable/index.md
index 75fc75b7f260e80..c3cf5b09845e32f 100644
--- a/files/en-us/web/html/global_attributes/contenteditable/index.md
+++ b/files/en-us/web/html/global_attributes/contenteditable/index.md
@@ -15,6 +15,7 @@ The attribute must take one of the following values:
 
 - `true` or an _empty string_, which indicates that the element is editable.
 - `false`, which indicates that the element is not editable.
+- `plaintext-only`, which indicates that the element's raw text is editable, but rich text formatting is disabled.
 
 If the attribute is given without a value, like `<label contenteditable>Example Label</label>`, its value is treated as an empty string.