diff --git a/bookmarklet.js b/bookmarklet.js
index 08e8d22..9277a7c 100644
--- a/bookmarklet.js
+++ b/bookmarklet.js
@@ -1,6 +1,7 @@
 javascript:(() => {
   /* Generate the b64 API functions */
   var b64 = (() => {
+    /* Generate a dictionary with {key: val} as {character: index in input string} */
     function generateIndexDict(a) {
       let result = {};
       for (let i = 0; i < a.length; i++) {
@@ -8,6 +9,8 @@ javascript:(() => {
       }
       return result;
     }
+
+    /* Decode URL safe even though it is not the primary encoding mechanism */
     const _a = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
     const _aRev = generateIndexDict(_a);
     _aRev["-"] = _aRev["+"];
@@ -17,15 +20,19 @@ javascript:(() => {
     const _dec = new TextDecoder("utf-8");
 
     return {
+      /* Decode base64 to a string */
       encode: function(s) {
         return this.binaryToBase64(this.asciiToBinary(s));
       },
 
+      /* Convert a string to a Uint8Array */
       asciiToBinary: function(text) {
         return _enc.encode(text);
       },
 
+      /* Return a base64-encoded string from a Uint8Array input */
       binaryToBase64: function(originalBytes) {
+        /* Pad the output array to a multiple of 3 bytes */
         let length = originalBytes.length;
         let added = (length % 3 == 0) ? 0 : (3 - length % 3);
         let bytes = new Uint8Array(length + added);
@@ -33,12 +40,19 @@ javascript:(() => {
 
         let output = "";
         for (let i = 0; i < bytes.length; i += 3) {
+          /*
+          Convert 3 8-bit bytes into 4 6-bit indices and get a character from
+          the master list based on each 6-bit index
+             3 x 8-bit:  |------ --|---- ----|-- ------|
+          => 4 x 6-bit:  |------|-- ----|---- --|------|
+          */
           output += _a[ bytes[i] >>> 2 ];
           output += _a[ ((bytes[i] & 0x3) << 4) | (bytes[i + 1] >>> 4) ];
           output += _a[ ((bytes[i + 1] & 0xF) << 2) | (bytes[i + 2] >>> 6) ];
           output += _a[ bytes[i + 2] & 0x3F ];
         }
 
+        /* Turn the final "A" characters into "=" depending on necessary padding */
         if (added > 0) {
           output = output.slice(0, -added) + ("=".repeat(added));
         }
@@ -52,6 +66,7 @@ javascript:(() => {
   var api = {
     VERSION: "0.2.0",
 
+    /* Return a link to view the page */
     getViewLink: function(pageData) {
       var urlData = {
         version: this.VERSION,