diff --git a/format.go b/format.go
index b2085d6..0ce6215 100644
--- a/format.go
+++ b/format.go
@@ -104,7 +104,7 @@ func (a *App) diff(change *tfjson.Change) string {
 		jsondiffprinter.WithTerraformDefaults(),
 		jsondiffprinter.WithWriter(buf),
 		jsondiffprinter.WithIndentation("    "),
-		jsondiffprinter.WithHideUnchanged(true),
+		jsondiffprinter.WithHideUnchanged(!a.showUnchanged),
 		jsondiffprinter.WithJSONinJSONCompare(compare),
 		jsondiffprinter.WithColor(!a.noColor),
 		jsondiffprinter.WithPatchSeriesPostProcess(func(diff jsondiffprinter.Patch) jsondiffprinter.Patch {
diff --git a/main.go b/main.go
index 02d4924..2488c27 100644
--- a/main.go
+++ b/main.go
@@ -46,6 +46,11 @@ Resource actions are indicated with the following symbols:
 				Usage:       "Disable colorized output",
 				Destination: &app.noColor,
 			},
+			&cli.BoolFlag{
+				Name:        "show-unchanged",
+				Usage:       "Show unchanged attributes",
+				Destination: &app.showUnchanged,
+			},
 		},
 		CustomAppHelpTemplate: cli.AppHelpTemplate + executionPlanLegend,
 
@@ -56,7 +61,8 @@ Resource actions are indicated with the following symbols:
 }
 
 type App struct {
-	noColor bool
+	noColor       bool
+	showUnchanged bool
 }
 
 func (a *App) Reveal(c *cli.Context) error {