@@ -7,6 +7,7 @@ "io"
 	"io/fs"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"go.alanpearce.eu/x/log"
 
@@ -70,11 +71,11 @@ })
 }
 
 func (f *Files) Open(filename string) (io.ReadCloser, error) {
-	return os.Open(filepath.Join(f.outputDirectory, filename))
+	return os.Open(f.join(filename))
 }
 
 func (f *Files) OutputToFile(output io.Reader, filename string) error {
-	fn := filepath.Join(f.outputDirectory, filename)
+	fn := f.join(filename)
 	if err := f.mkdirp(filepath.Dir(filename)); err != nil {
 		return err
 	}
@@ -93,7 +94,7 @@ return nil
 }
 
 func (f *Files) RenderToFile(component templ.Component, filename string) error {
-	fn := filepath.Join(f.outputDirectory, filename)
+	fn := f.join(filename)
 	if err := f.mkdirp(filepath.Dir(filename)); err != nil {
 		return err
 	}
@@ -112,7 +113,7 @@ return nil
 }
 
 func (f *Files) WriterToFile(writer io.WriterTo, filename string) error {
-	fn := filepath.Join(f.outputDirectory, filename)
+	fn := f.join(filename)
 	if err := f.mkdirp(filepath.Dir(filename)); err != nil {
 		return err
 	}
@@ -209,3 +210,10 @@ err := os.MkdirAll(filepath.Join(f.outputDirectory, dir), 0755)
 
 	return errors.WithMessage(err, "could not create directory")
 }
+
+func (f *Files) join(filename string) string {
+	if strings.HasSuffix(filename, "/") {
+		filename = filename + "index.html"
+	}
+	return filepath.Join(f.outputDirectory, filename)
+}