diff --git a/examples/text-only/pdf2svg.js b/examples/text-only/pdf2svg.js
index 29f0e4ef6..9cdd720bc 100644
--- a/examples/text-only/pdf2svg.js
+++ b/examples/text-only/pdf2svg.js
@@ -30,7 +30,7 @@ function buildSVG(viewport, textContent) {
 
   // processing all items
   textContent.items.forEach(function (textItem) {
-    // we have to take in account viewport transform, which incudes scale,
+    // we have to take in account viewport transform, which includes scale,
     // rotation and Y-axis flip, and not forgetting to flip text.
     var tx = PDFJS.Util.transform(
       PDFJS.Util.transform(viewport.transform, textItem.transform),
diff --git a/extensions/firefox/content/PdfJs.jsm b/extensions/firefox/content/PdfJs.jsm
index 09d4e34ef..454b1f8b0 100644
--- a/extensions/firefox/content/PdfJs.jsm
+++ b/extensions/firefox/content/PdfJs.jsm
@@ -266,7 +266,7 @@ var PdfJs = {
   /**
    * pdf.js is only enabled if it is both selected as the pdf viewer and if the
    * global switch enabling it is true.
-   * @return {boolean} Wether or not it's enabled.
+   * @return {boolean} Whether or not it's enabled.
    */
   get enabled() {
     var disabled = getBoolPref(PREF_DISABLED, true);
diff --git a/extensions/firefox/content/PdfStreamConverter.jsm b/extensions/firefox/content/PdfStreamConverter.jsm
index 5d375bfee..444a2f7b8 100644
--- a/extensions/firefox/content/PdfStreamConverter.jsm
+++ b/extensions/firefox/content/PdfStreamConverter.jsm
@@ -357,7 +357,7 @@ ChromeActions.prototype = {
       var result = this.localizedStrings[data];
       return JSON.stringify(result || null);
     } catch (e) {
-      log('Unable to retrive localized strings: ' + e);
+      log('Unable to retrieve localized strings: ' + e);
       return 'null';
     }
   },
diff --git a/make.js b/make.js
index a38eeea03..1598f1f04 100644
--- a/make.js
+++ b/make.js
@@ -366,7 +366,7 @@ target.dist = function() {
                    JSON.stringify(bowerManifest, null, 2));
 
   echo();
-  echo('### Commiting changes');
+  echo('### Committing changes');
 
   cd(DIST_DIR);
   var reason = process.env['PDFJS_UPDATE_REASON'];
diff --git a/src/core/cff_parser.js b/src/core/cff_parser.js
index 2c7578f48..3de7d3495 100644
--- a/src/core/cff_parser.js
+++ b/src/core/cff_parser.js
@@ -833,7 +833,7 @@ var CFFParser = (function CFFParserClosure() {
             break;
 
           default:
-            error('Unknow encoding format: ' + format + ' in CFF');
+            error('Unknown encoding format: ' + format + ' in CFF');
             break;
         }
         var dataEnd = pos;
@@ -1306,7 +1306,7 @@ var CFFCompiler = (function CFFCompilerClosure() {
       var globalSubrIndex = this.compileIndex(cff.globalSubrIndex);
       output.add(globalSubrIndex);
 
-      // Now start on the other entries that have no specfic order.
+      // Now start on the other entries that have no specific order.
       if (cff.encoding && cff.topDict.hasName('Encoding')) {
         if (cff.encoding.predefined) {
           topDictTracker.setEntryLocation('Encoding', [cff.encoding.format],
diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index 3a97ebbbe..47f5816b1 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -2222,7 +2222,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
 
       // According to the spec if 'FontDescriptor' is declared, 'FirstChar',
       // 'LastChar' and 'Widths' should exist too, but some PDF encoders seem
-      // to ignore this rule when a variant of a standart font is used.
+      // to ignore this rule when a variant of a standard font is used.
       // TODO Fill the width array depending on which of the base font this is
       // a variant.
       var firstChar = (dict.get('FirstChar') || 0);
diff --git a/src/core/fonts.js b/src/core/fonts.js
index d24cb0a6b..ce28005cb 100644
--- a/src/core/fonts.js
+++ b/src/core/fonts.js
@@ -2637,7 +2637,7 @@ var Font = (function FontClosure() {
       // Naming tables
       builder.addTable('name', createNameTable(fontName));
 
-      // PostScript informations
+      // PostScript information
       builder.addTable('post', createPostTable(properties));
 
       return builder.toArray();
@@ -3014,7 +3014,7 @@ var Type1Font = (function Type1FontClosure() {
                           (pfbHeader[3] << 8) | pfbHeader[2];
     }
 
-    // Get the data block containing glyphs and subrs informations
+    // Get the data block containing glyphs and subrs information
     var headerBlock = getHeaderBlock(file, headerBlockLength);
     headerBlockLength = headerBlock.length;
     var headerBlockParser = new Type1Parser(headerBlock.stream, false,
diff --git a/src/core/function.js b/src/core/function.js
index a6d89032e..4927a35cf 100644
--- a/src/core/function.js
+++ b/src/core/function.js
@@ -362,7 +362,7 @@ var PDFFunction = (function PDFFunctionClosure() {
 
         // clip to domain
         var v = clip(src[srcOffset], domain[0], domain[1]);
-        // calulate which bound the value is in
+        // calculate which bound the value is in
         for (var i = 0, ii = bounds.length; i < ii; ++i) {
           if (v < bounds[i]) {
             break;
diff --git a/src/core/image.js b/src/core/image.js
index 9f2b68a15..ebd5ce9b7 100644
--- a/src/core/image.js
+++ b/src/core/image.js
@@ -365,7 +365,7 @@ var PDFImage = (function PDFImageClosure() {
             i += 8;
           }
 
-          // handle remaing bits
+          // handle remaining bits
           if (i < loop2End) {
             buf = buffer[bufferPos++];
             mask = 128;
@@ -433,7 +433,7 @@ var PDFImage = (function PDFImageClosure() {
                                        width, height);
           }
         } else if (isArray(mask)) {
-          // Color key mask: if any of the compontents are outside the range
+          // Color key mask: if any of the components are outside the range
           // then they should be painted.
           alphaBuf = new Uint8Array(width * height);
           var numComps = this.numComps;
diff --git a/src/core/jpx.js b/src/core/jpx.js
index 638cf6a06..f6fe2132c 100644
--- a/src/core/jpx.js
+++ b/src/core/jpx.js
@@ -1350,13 +1350,13 @@ var JpxImage = (function JpxImageClosure() {
         var subband = resolution.subbands[j];
         var gainLog2 = SubbandsGainLog2[subband.type];
 
-        // calulate quantization coefficient (Section E.1.1.1)
+        // calculate quantization coefficient (Section E.1.1.1)
         var delta = (reversible ? 1 :
           Math.pow(2, precision + gainLog2 - epsilon) * (1 + mu / 2048));
         var mb = (guardBits + epsilon - 1);
 
         // In the first resolution level, copyCoefficients will fill the
-        // whole array with coefficients. In the succeding passes,
+        // whole array with coefficients. In the succeeding passes,
         // copyCoefficients will consecutively fill in the values that belong
         // to the interleaved positions of the HL, LH, and HH coefficients.
         // The LL coefficients will then be interleaved in Transform.iterate().
diff --git a/src/core/murmurhash3.js b/src/core/murmurhash3.js
index 292c59f66..32d607059 100644
--- a/src/core/murmurhash3.js
+++ b/src/core/murmurhash3.js
@@ -33,7 +33,7 @@
 var Uint32ArrayView = sharedUtil.Uint32ArrayView;
 
 var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) {
-  // Workaround for missing math precison in JS.
+  // Workaround for missing math precision in JS.
   var MASK_HIGH = 0xffff0000;
   var MASK_LOW = 0xffff;
 
diff --git a/src/core/parser.js b/src/core/parser.js
index 12a54002f..cd93beb35 100644
--- a/src/core/parser.js
+++ b/src/core/parser.js
@@ -742,7 +742,7 @@ var Lexer = (function LexerClosure() {
         } else if (ch === 0x2D) { // '-'
           // ignore minus signs in the middle of numbers to match
           // Adobe's behavior
-          warn('Badly formated number');
+          warn('Badly formatted number');
         } else if (ch === 0x45 || ch === 0x65) { // 'E', 'e'
           // 'E' can be either a scientific notation or the beginning of a new
           // operator
diff --git a/src/display/canvas.js b/src/display/canvas.js
index e9b356356..732d2ee9a 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -1813,7 +1813,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       var currentCtx = this.ctx;
       // TODO non-isolated groups - according to Rik at adobe non-isolated
       // group results aren't usually that different and they even have tools
-      // that ignore this setting. Notes from Rik on implmenting:
+      // that ignore this setting. Notes from Rik on implementing:
       // - When you encounter an transparency group, create a new canvas with
       // the dimensions of the bbox
       // - copy the content from the previous canvas to the new canvas
diff --git a/src/display/pattern_helper.js b/src/display/pattern_helper.js
index 8691370b7..44f0bdd6d 100644
--- a/src/display/pattern_helper.js
+++ b/src/display/pattern_helper.js
@@ -170,7 +170,7 @@ var createMeshCanvas = (function createMeshCanvasClosure() {
     // MAX_PATTERN_SIZE is used to avoid OOM situation.
     var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
     // We need to keep transparent border around our pattern for fill():
-    // createPattern with 'no-repeat' will bleed edges accross entire area.
+    // createPattern with 'no-repeat' will bleed edges across entire area.
     var BORDER_SIZE = 2;
 
     var offsetX = Math.floor(bounds[0]);
diff --git a/src/shared/util.js b/src/shared/util.js
index 70119b68f..32492b78d 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -1102,7 +1102,7 @@ function isSpace(ch) {
  *
  * @typedef {Object} PromiseCapability
  * @property {Promise} promise - A promise object.
- * @property {function} resolve - Fullfills the promise.
+ * @property {function} resolve - Fulfills the promise.
  * @property {function} reject - Rejects the promise.
  */
 
@@ -1125,8 +1125,8 @@ function createPromiseCapability() {
 /**
  * Polyfill for Promises:
  * The following promise implementation tries to generally implement the
- * Promise/A+ spec. Some notable differences from other promise libaries are:
- * - There currently isn't a seperate deferred and promise object.
+ * Promise/A+ spec. Some notable differences from other promise libraries are:
+ * - There currently isn't a separate deferred and promise object.
  * - Unhandled rejections eventually show an error if they aren't handled.
  *
  * Based off of the work in:
@@ -1308,7 +1308,7 @@ function createPromiseCapability() {
    * Builds a promise that is resolved when all the passed in promises are
    * resolved.
    * @param {array} promises array of data and/or promises to wait for.
-   * @return {Promise} New dependant promise.
+   * @return {Promise} New dependent promise.
    */
   Promise.all = function Promise_all(promises) {
     var resolveAll, rejectAll;
diff --git a/test/features/tests.js b/test/features/tests.js
index 65d150790..825ddf5a1 100644
--- a/test/features/tests.js
+++ b/test/features/tests.js
@@ -561,7 +561,7 @@ var tests = [
   },
   {
     id: 'Worker-xhr-response',
-    name: 'XMLHttpRequest supports the reponse property in web workers',
+    name: 'XMLHttpRequest supports the response property in web workers',
     run: function () {
       if (typeof Worker == 'undefined')
         return { output: 'Skipped', emulated: '' };
diff --git a/web/chromecom.js b/web/chromecom.js
index 275c49070..998042976 100644
--- a/web/chromecom.js
+++ b/web/chromecom.js
@@ -278,7 +278,7 @@
         // the PDF file. When the viewer is reloaded or when the user navigates
         // back and forward, the background page will not observe a HTTP request
         // with Referer. To make sure that the Referer is preserved, store it in
-        // history.state, which is preserved accross reloads/navigations.
+        // history.state, which is preserved across reloads/navigations.
         var state = window.history.state || {};
         state.chromecomState = referer;
         window.history.replaceState(state, '');
diff --git a/web/debugger.js b/web/debugger.js
index 184a713d1..8a049f4c6 100644
--- a/web/debugger.js
+++ b/web/debugger.js
@@ -578,7 +578,7 @@ var PDFBug = (function PDFBugClosure() {
         } else {
           panel.textContent = tool.name + ' is disabled. To enable add ' +
                               ' "' + tool.id + '" to the pdfBug parameter ' +
-                              'and refresh (seperate multiple by commas).';
+                              'and refresh (separate multiple by commas).';
         }
         buttons.push(panelButton);
       }
diff --git a/web/pdf_page_view.js b/web/pdf_page_view.js
index 8386c273a..cef2a4193 100644
--- a/web/pdf_page_view.js
+++ b/web/pdf_page_view.js
@@ -583,7 +583,7 @@ var PDFPageView = (function PDFPageViewClosure() {
         }, function(error) {
           console.error(error);
           // Tell the printEngine that rendering this canvas/page has failed.
-          // This will make the print proces stop.
+          // This will make the print process stop.
           if ('abort' in obj) {
             obj.abort();
           } else {