diff --git a/doc/exports/html/all-in-one/.gitignore b/doc/exports/html/all-in-one/.gitignore
new file mode 100644
index 00000000..2d19fc76
--- /dev/null
+++ b/doc/exports/html/all-in-one/.gitignore
@@ -0,0 +1 @@
+*.html
diff --git a/doc/exports/html/all-in-one/.placefolder b/doc/exports/html/all-in-one/.placefolder
new file mode 100644
index 00000000..e69de29b
diff --git a/doc/exports/html/help/.gitignore b/doc/exports/html/help/.gitignore
new file mode 100644
index 00000000..03af65c9
--- /dev/null
+++ b/doc/exports/html/help/.gitignore
@@ -0,0 +1,3 @@
+*.html
+*.hhp
+*.hhc
diff --git a/doc/exports/html/help/.placefolder b/doc/exports/html/help/.placefolder
new file mode 100644
index 00000000..e69de29b
diff --git a/doc/exports/html/online/.gitignore b/doc/exports/html/online/.gitignore
new file mode 100644
index 00000000..2d19fc76
--- /dev/null
+++ b/doc/exports/html/online/.gitignore
@@ -0,0 +1 @@
+*.html
diff --git a/doc/exports/html/online/.placefolder b/doc/exports/html/online/.placefolder
new file mode 100644
index 00000000..e69de29b