diff --git a/README.md b/README.md
index 8a3323f..7208db1 100644
--- a/README.md
+++ b/README.md
@@ -565,37 +565,6 @@ blobUtil.imgSrcToDataURL('http://some-other-site.com/img.jpg', 'image/jpeg',
 **Returns:** `Promise`<`string`>
 Promise that resolves with the data URL string
 
-___
-<a id="imgtocanvas"></a>
-
-### `<Private>` imgToCanvas
-
-▸ **imgToCanvas**(img: *`any`*): `HTMLCanvasElement`
-
-**Parameters:**
-
-| Param | Type |
-| ------ | ------ |
-| img | `any` |
-
-**Returns:** `HTMLCanvasElement`
-
-___
-<a id="loadimage"></a>
-
-### `<Private>` loadImage
-
-▸ **loadImage**(src: *`any`*, crossOrigin: *`any`*): `Promise`<`Object`>
-
-**Parameters:**
-
-| Param | Type |
-| ------ | ------ |
-| src | `any` |
-| crossOrigin | `any` |
-
-**Returns:** `Promise`<`Object`>
-
 ___
 <a id="revokeobjecturl"></a>
 
diff --git a/package.json b/package.json
index fcb8c42..5608909 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "build-umd": "rollup -i lib/blob-util.js -f umd -n blobUtil -o dist/blob-util.js",
     "min": "uglifyjs dist/blob-util.js -mc > dist/blob-util.min.js",
     "doc": "run-s cleanup-doc gen-doc gen-readme cleanup-doc",
-    "gen-doc": "typedoc --out docs-tmp --target ES6 --theme markdown --mdHideSources --excludePrivate src",
+    "gen-doc": "typedoc --out docs-tmp --target ES6 --theme markdown --mdHideSources --excludePrivate --exclude private.ts src",
     "gen-readme": "node bin/write-docs-to-readme.js",
     "cleanup-doc": "rimraf docs-tmp"
   },
diff --git a/src/blob-util.ts b/src/blob-util.ts
index 9ba861a..4035a14 100644
--- a/src/blob-util.ts
+++ b/src/blob-util.ts
@@ -14,39 +14,7 @@ declare var WebKitBlobBuilder: any
 /** @private */
 declare var webkitURL: any
 
-/** @private */
-function loadImage (src, crossOrigin) {
-  return new Promise(function (resolve, reject) {
-    var img = new Image()
-    if (crossOrigin) {
-      img.crossOrigin = crossOrigin
-    }
-    img.onload = function () {
-      resolve(img)
-    }
-    img.onerror = reject
-    img.src = src
-  })
-}
-
-/** @private */
-function imgToCanvas (img) {
-  var canvas = document.createElement('canvas')
-
-  canvas.width = img.width
-  canvas.height = img.height
-
-  // copy the image contents to the canvas
-  var context = canvas.getContext('2d')
-  context.drawImage(
-    img,
-    0, 0,
-    img.width, img.height,
-    0, 0,
-    img.width, img.height)
-
-  return canvas
-}
+import { loadImage, imgToCanvas } from './private'
 
 /**
  * Shim for
diff --git a/src/private.ts b/src/private.ts
new file mode 100644
index 0000000..8b9bb7b
--- /dev/null
+++ b/src/private.ts
@@ -0,0 +1,36 @@
+// TODO: including these in blob-util.ts causes typedoc to generate docs for them,
+// even with --excludePrivate ¯\_(ツ)_/¯
+
+/** @private */
+export function loadImage (src, crossOrigin) {
+  return new Promise(function (resolve, reject) {
+    var img = new Image()
+    if (crossOrigin) {
+      img.crossOrigin = crossOrigin
+    }
+    img.onload = function () {
+      resolve(img)
+    }
+    img.onerror = reject
+    img.src = src
+  })
+}
+
+/** @private */
+export function imgToCanvas (img) {
+  var canvas = document.createElement('canvas')
+
+  canvas.width = img.width
+  canvas.height = img.height
+
+  // copy the image contents to the canvas
+  var context = canvas.getContext('2d')
+  context.drawImage(
+    img,
+    0, 0,
+    img.width, img.height,
+    0, 0,
+    img.width, img.height)
+
+  return canvas
+}