diff --git a/oshw_logo.html b/oshw_logo.html
index 7dd8ae0..53f37ee 100644
--- a/oshw_logo.html
+++ b/oshw_logo.html
@@ -112,9 +112,9 @@
 			var select = document.getElementById("filetype")
 			var filetype = select.options[select.selectedIndex].value
 			switch (filetype) {
-				case 'json':
+				case 'cvlp':
 					var blob = new Blob([JSON.stringify(logo, null, '\t')], {type: "application/json"})
-					saveAs(blob, "oshw_logo.json")
+					saveAs(blob, "oshw_logo.cvlp")
 					break
 				case 'svg':
 					var blob = new Blob([new XMLSerializer().serializeToString(json2svg(logo))], {type: "image/svg+xml"})
@@ -137,7 +137,7 @@
 					break
 				case 'zip':
 					var zip = new JSZip()
-					zip.file("oshw_logo.json", JSON.stringify(logo, null, '\t'))
+					zip.file("oshw_logo.cvlp", JSON.stringify(logo, null, '\t'))
 					zip.file("oshw_logo.svg", new XMLSerializer().serializeToString(json2svg(logo)))
 					zip.file("oshw_logo.fp", json2pcb(logo))
 					zip.file("oshw_logo.kicad_mod", json2kicad(logo))
@@ -201,7 +201,7 @@
 		chip thickness: <input id="chip_thickness_input" type="number" step="any" value=1.0 min=0 onchange="draw()"/><br />
 		text thickness: <input id="text_thickness_input" type="number" step="any" value=1.0 min=0 onchange="draw()"/><br />
 		 <button type="button" onclick="download()">save</button>: <select id="filetype">
-			<option value="json">CuVoodoo Land Pattern (.json)</option>
+			<option value="cvlp">CuVoodoo Land Pattern (.cvlp)</option>
 			<option value="svg">Scalable Vector Graphics (.svg)</option>
 			<option value="pcb">gEDA pcb footprint (.fp)</option>
 			<option value="kicad">KiCad s-expr. footprint (.kicad_mod)</option>