diff --git a/README.md b/README.md
index d968bf1..5c6a571 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,10 @@ async decode()
 : Decodes the palette and the pixel data of the PNG data passed into the constructor. Calls `decodePixels()` and `decodePalette()`.
 
 [ImageData](https://developer.mozilla.org/en-US/docs/Web/API/ImageData) async toImageData([ImageDataOptions](#imagedataoptions)) 
-: Returns ImageData. Calls `decode()` automatically if PNG has not been decoded.
+: Returns ImageData. Calls `toPNGData(options)`.
+
+[PNGData](#pngdata) async toPNGData([ImageDataOptions](#imagedataoptions))
+: Returns PNGData. Calls `decode()` automatically if PNG has not been decoded.
   
 ### ImageDataOptions
 Object containing options to apply during `toImageData()`.
@@ -97,3 +100,11 @@ let clip = {
     h: 32,
 }
 ```
+
+### PNGData
+Object containing the pixel data and row width.
+
+| Property | Type  
+|----------|------------
+| pixels   | [Uint8ClampedArray](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray) | RGBA pixel data.
+| width    | Number | Width of each row of pixel data.
diff --git a/src/index.js b/src/index.js
index 5b0ade2..241ed91 100644
--- a/src/index.js
+++ b/src/index.js
@@ -294,7 +294,7 @@ class IndexedPNG {
     return ret;
   }
 
-  async toImageData(options) {
+  async toPNGData(options) {
     const palette = options.palette || this.decodedPalette
     if (!this.decodedPixels) {
       await this.decode()
@@ -322,7 +322,7 @@ class IndexedPNG {
           pixels[i++] = palette[index+3]
         }
       }
-      return new ImageData(pixels, options.clip.w)
+      return { pixels: pixels, width: options.clip.w }
     } else {
       // Allocate RGBA buffer
       const pixels = new Uint8ClampedArray(this.decodedPixels.length * 4)
@@ -334,8 +334,14 @@ class IndexedPNG {
         pixels[j++] = palette[index+2]  // B
         pixels[j++] = palette[index+3]  // A
       }
-      return new ImageData(pixels, this.width)
+      return { pixels: pixels, width: this.width }
     }
+
+  }
+
+  async toImageData(options) {
+    let data = await this.toPNGData(options)
+    return new ImageData(data.pixels, data.width)
   }
 
   async decode() {