diff --git a/index.html b/index.html
index baea0bc..4504630 100644
--- a/index.html
+++ b/index.html
@@ -45,7 +45,7 @@
         <p>You can play the original levels, or any you've downloaded from the web!</p>
         <!-- TODO explain how to find chips.dat or steam folder -->
         <!-- TODO drag and drop? -->
-        <p><input id="splash-upload" type="file"></p>
+        <p><input id="splash-upload" type="file" accept=".dat,.ccl,.c2m,.ccs"></p>
 
         <h2>Make your own (WIP lol)</h2>
         <p><button type="button" id="splash-create-level">Create a level</button></p>