diff --git a/codecs/imagequant/imagequant.cpp b/codecs/imagequant/imagequant.cpp
index bed1fd87..2150174c 100644
--- a/codecs/imagequant/imagequant.cpp
+++ b/codecs/imagequant/imagequant.cpp
@@ -16,37 +16,41 @@ int version() {
 
 const val Uint8ClampedArray = val::global("Uint8ClampedArray");
 
+#define liq_ptr(T) std::unique_ptr<T, std::integral_constant<decltype(&T##_destroy), T##_destroy>>
+
+using liq_attr_ptr = liq_ptr(liq_attr);
+using liq_image_ptr = liq_ptr(liq_image);
+using liq_result_ptr = liq_ptr(liq_result);
+
+liq_result_ptr liq_image_quantize(liq_image* image, liq_attr* attr) {
+  liq_result* res = nullptr;
+  liq_image_quantize(image, attr, &res);
+  return liq_result_ptr(res);
+}
+
 val quantize(std::string rawimage,
              int image_width,
              int image_height,
              int num_colors,
              float dithering) {
-  const uint8_t* image_buffer = (uint8_t*)rawimage.c_str();
+  auto image_buffer = (const liq_color*)rawimage.c_str();
   int size = image_width * image_height;
-  liq_attr* attr = liq_attr_create();
-  liq_image* image = liq_image_create_rgba(attr, image_buffer, image_width, image_height, 0);
-  liq_set_max_colors(attr, num_colors);
-  liq_result* res = nullptr;
-  liq_image_quantize(image, attr, &res);
-  liq_set_dithering_level(res, dithering);
-  uint8_t* image8bit = (uint8_t*)malloc(size);
-  uint8_t* result = (uint8_t*)malloc(size * 4);
-  liq_write_remapped_image(res, image, image8bit, size);
-  const liq_palette* pal = liq_get_palette(res);
+  liq_attr_ptr attr(liq_attr_create());
+  liq_image_ptr image(
+      liq_image_create_rgba(attr.get(), image_buffer, image_width, image_height, 0));
+  liq_set_max_colors(attr.get(), num_colors);
+  auto res = liq_image_quantize(image.get(), attr.get());
+  liq_set_dithering_level(res.get(), dithering);
+  std::vector<uint8_t> image8bit(size);
+  std::vector<liq_color> result(size);
+  liq_write_remapped_image(res.get(), image.get(), image8bit.data(), image8bit.size());
+  auto pal = liq_get_palette(res.get());
   // Turn palletted image back into an RGBA image
   for (int i = 0; i < size; i++) {
-    result[i * 4 + 0] = pal->entries[image8bit[i]].r;
-    result[i * 4 + 1] = pal->entries[image8bit[i]].g;
-    result[i * 4 + 2] = pal->entries[image8bit[i]].b;
-    result[i * 4 + 3] = pal->entries[image8bit[i]].a;
+    result[i] = pal->entries[image8bit[i]];
   }
-  free(image8bit);
-  liq_result_destroy(res);
-  liq_image_destroy(image);
-  liq_attr_destroy(attr);
-  val js_result = Uint8ClampedArray.new_(typed_memory_view(image_width * image_height * 4, result));
-  free(result);
-  return js_result;
+  return Uint8ClampedArray.new_(
+      typed_memory_view(result.size() * sizeof(liq_color), (const uint8_t*)result.data()));
 }
 
 const liq_color zx_colors[] = {
@@ -73,12 +77,11 @@ const liq_color zx_colors[] = {
  * and bright.
  */
 val zx_quantize(std::string rawimage, int image_width, int image_height, float dithering) {
-  const uint8_t* image_buffer = (uint8_t*)rawimage.c_str();
+  auto image_buffer = (const liq_color*)rawimage.c_str();
   int size = image_width * image_height;
-  int bytes_per_pixel = 4;
-  uint8_t block[8 * 8 * bytes_per_pixel];
-  uint8_t* result = (uint8_t*)malloc(size * bytes_per_pixel);
-  uint8_t* image8bit = (uint8_t*)malloc(8 * 8);
+  liq_color block[8 * 8];
+  uint8_t image8bit[8 * 8];
+  std::vector<liq_color> result(size);
 
   // For each 8x8 grid
   for (int block_start_y = 0; block_start_y < image_height; block_start_y += 8) {
@@ -101,25 +104,22 @@ val zx_quantize(std::string rawimage, int image_width, int image_height, float d
       // For each pixel in that block:
       for (int y = block_start_y; y < block_start_y + block_height; y++) {
         for (int x = block_start_x; x < block_start_x + block_width; x++) {
-          int pixel_start = (y * image_width * bytes_per_pixel) + (x * bytes_per_pixel);
+          int pixel_start = (y * image_width) + x;
           int smallest_distance = INT_MAX;
           int winning_index = -1;
 
           // Copy pixel data for quantizing later
           block[block_index++] = image_buffer[pixel_start];
-          block[block_index++] = image_buffer[pixel_start + 1];
-          block[block_index++] = image_buffer[pixel_start + 2];
-          block[block_index++] = image_buffer[pixel_start + 3];
 
           // Which zx color is this pixel closest to?
           for (int color_index = 0; color_index < 15; color_index++) {
             liq_color color = zx_colors[color_index];
+            liq_color pixel = image_buffer[pixel_start];
 
             // Using Euclidean distance. LibQuant has better methods, but it
             // requires conversion to LAB, so I don't think it's worth it.
-            int distance = pow(color.r - image_buffer[pixel_start + 0], 2) +
-                           pow(color.g - image_buffer[pixel_start + 1], 2) +
-                           pow(color.b - image_buffer[pixel_start + 2], 2);
+            int distance =
+                pow(color.r - pixel.r, 2) + pow(color.g - pixel.g, 2) + pow(color.b - pixel.b, 2);
 
             if (distance < smallest_distance) {
               winning_index = color_index;
@@ -183,41 +183,30 @@ val zx_quantize(std::string rawimage, int image_width, int image_height, float d
       }
 
       // Quantize
-      liq_attr* attr = liq_attr_create();
-      liq_image* image = liq_image_create_rgba(attr, block, block_width, block_height, 0);
-      liq_set_max_colors(attr, 2);
-      liq_image_add_fixed_color(image, zx_colors[first_color_index]);
-      liq_image_add_fixed_color(image, zx_colors[second_color_index]);
-      liq_result* res = nullptr;
-      liq_image_quantize(image, attr, &res);
-      liq_set_dithering_level(res, dithering);
-      liq_write_remapped_image(res, image, image8bit, size);
-      const liq_palette* pal = liq_get_palette(res);
+      liq_attr_ptr attr(liq_attr_create());
+      liq_image_ptr image(liq_image_create_rgba(attr.get(), block, block_width, block_height, 0));
+      liq_set_max_colors(attr.get(), 2);
+      liq_image_add_fixed_color(image.get(), zx_colors[first_color_index]);
+      liq_image_add_fixed_color(image.get(), zx_colors[second_color_index]);
+      auto res = liq_image_quantize(image.get(), attr.get());
+      liq_set_dithering_level(res.get(), dithering);
+      liq_write_remapped_image(res.get(), image.get(), image8bit, size);
+      auto pal = liq_get_palette(res.get());
 
       // Turn palletted image back into an RGBA image, and write it into the
       // full size result image.
       for (int y = 0; y < block_height; y++) {
         for (int x = 0; x < block_width; x++) {
           int image8BitPos = y * block_width + x;
-          int resultStartPos = ((block_start_y + y) * bytes_per_pixel * image_width) +
-                               ((block_start_x + x) * bytes_per_pixel);
-          result[resultStartPos + 0] = pal->entries[image8bit[image8BitPos]].r;
-          result[resultStartPos + 1] = pal->entries[image8bit[image8BitPos]].g;
-          result[resultStartPos + 2] = pal->entries[image8bit[image8BitPos]].b;
-          result[resultStartPos + 3] = pal->entries[image8bit[image8BitPos]].a;
+          int resultStartPos = ((block_start_y + y) * image_width) + (block_start_x + x);
+          result[resultStartPos] = pal->entries[image8bit[image8BitPos]];
         }
       }
-
-      liq_result_destroy(res);
-      liq_image_destroy(image);
-      liq_attr_destroy(attr);
     }
   }
 
-  free(image8bit);
-  val js_result = Uint8ClampedArray.new_(typed_memory_view(size * 4, result));
-  free(result);
-  return js_result;
+  return Uint8ClampedArray.new_(
+      typed_memory_view(result.size() * sizeof(liq_color), (const uint8_t*)result.data()));
 }
 
 EMSCRIPTEN_BINDINGS(my_module) {
diff --git a/codecs/imagequant/imagequant.js b/codecs/imagequant/imagequant.js
index 9cac4d86..9a675ae2 100644
--- a/codecs/imagequant/imagequant.js
+++ b/codecs/imagequant/imagequant.js
@@ -6,66 +6,52 @@ var imagequant = (function() {
 function(imagequant) {
   imagequant = imagequant || {};
 
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+c.dynCall_vi=function(){return(c.dynCall_vi=c.asm.B).apply(null,arguments)};c.dynCall_iiiiiif=function(){return(c.dynCall_iiiiiif=c.asm.C).apply(null,arguments)};c.dynCall_viiiiif=function(){return(c.dynCall_viiiiif=c.asm.D).apply(null,arguments)};c.dynCall_iiiiif=function(){return(c.dynCall_iiiiif=c.asm.E).apply(null,arguments)};c.dynCall_viiiif=function(){return(c.dynCall_viiiif=c.asm.F).apply(null,arguments)};c.dynCall_ii=function(){return(c.dynCall_ii=c.asm.G).apply(null,arguments)};
+c.dynCall_i=function(){return(c.dynCall_i=c.asm.H).apply(null,arguments)};c.dynCall_iii=function(){return(c.dynCall_iii=c.asm.I).apply(null,arguments)};c.dynCall_vif=function(){return(c.dynCall_vif=c.asm.J).apply(null,arguments)};c.dynCall_iidiiii=function(){return(c.dynCall_iidiiii=c.asm.K).apply(null,arguments)};c.dynCall_vii=function(){return(c.dynCall_vii=c.asm.L).apply(null,arguments)};c.dynCall_iiii=function(){return(c.dynCall_iiii=c.asm.M).apply(null,arguments)};
+c.dynCall_jiji=function(){return(c.dynCall_jiji=c.asm.N).apply(null,arguments)};c.dynCall_viiiiii=function(){return(c.dynCall_viiiiii=c.asm.O).apply(null,arguments)};c.dynCall_viiiii=function(){return(c.dynCall_viiiii=c.asm.P).apply(null,arguments)};c.dynCall_viiii=function(){return(c.dynCall_viiii=c.asm.Q).apply(null,arguments)};c.asm=sb;var Z;c.then=function(a){if(Z)a(c);else{var b=c.onRuntimeInitialized;c.onRuntimeInitialized=function(){b&&b();a(c)}}return c};O=function tb(){Z||ub();Z||(O=tb)};
+function ub(){function a(){if(!Z&&(Z=!0,c.calledRun=!0,!ha)){J(za);J(Aa);if(c.onRuntimeInitialized)c.onRuntimeInitialized();if(c.postRun)for("function"==typeof c.postRun&&(c.postRun=[c.postRun]);c.postRun.length;){var b=c.postRun.shift();Ba.unshift(b)}J(Ba)}}if(!(0<N)){if(c.preRun)for("function"==typeof c.preRun&&(c.preRun=[c.preRun]);c.preRun.length;)Ca();J(ya);0<N||(c.setStatus?(c.setStatus("Running..."),setTimeout(function(){setTimeout(function(){c.setStatus("")},1);a()},1)):a())}}c.run=ub;
+if(c.preInit)for("function"==typeof c.preInit&&(c.preInit=[c.preInit]);0<c.preInit.length;)c.preInit.pop()();noExitRuntime=!0;ub();
 
 
   return imagequant
diff --git a/codecs/imagequant/imagequant.wasm b/codecs/imagequant/imagequant.wasm
index 19ce45d5..fe6f9aea 100644
Binary files a/codecs/imagequant/imagequant.wasm and b/codecs/imagequant/imagequant.wasm differ