diff --git a/src/js/config/Categories.js b/src/js/config/Categories.js
index bca0dba5..36d32e0a 100755
--- a/src/js/config/Categories.js
+++ b/src/js/config/Categories.js
@@ -209,6 +209,8 @@ var Categories = [
             "Zip",
             "Unzip",
             "Bzip2 Decompress",
+            "Tar",
+            "Untar",
         ]
     },
     {
diff --git a/src/js/config/OperationConfig.js b/src/js/config/OperationConfig.js
index a9617059..df8fe22c 100755
--- a/src/js/config/OperationConfig.js
+++ b/src/js/config/OperationConfig.js
@@ -2993,5 +2993,26 @@ var OperationConfig = {
                 value: MorseCode.WORD_DELIM_OPTIONS
             }
         ]
+    },
+    "Tar": {
+        description: "Packs the input into a tarball.<br><br>No support for multiple files at this time.",
+        run: Compress.tar,
+        inputType: "byteArray",
+        outputType: "byteArray",
+        args: [
+            {
+                name: "Filename",
+                type: "string",
+                value: Compress.TAR_FILENAME
+            }
+        ]
+    },
+    "Untar": {
+        description: "Unpacks a tarball and displays it per file.",
+        run: Compress.untar,
+        inputType: "byteArray",
+        outputType: "html",
+        args: [
+        ]
     }
 };
diff --git a/src/js/core/Utils.js b/src/js/core/Utils.js
index 5c40c1e4..ef9fe1c3 100755
--- a/src/js/core/Utils.js
+++ b/src/js/core/Utils.js
@@ -929,6 +929,65 @@ var Utils = {
     },
 
 
+    /**
+     * Formats a list of files or directories.
+     *
+     * @param {File[]} files
+     * @returns {html}
+     */
+    HTMLFiles: function(files){
+        var formatDirectory = function(file) {
+            var html = "<div class='panel panel-default'>" +
+                   "<div class='panel-heading' role='tab'>" +
+                   "<h4 class='panel-title'>" +
+                   file.fileName +
+                   // The following line is for formatting when HTML is stripped
+                   "<span style='display: none'>\n0 bytes\n</span>" +
+                   "</h4>" +
+                   "</div>" +
+                   "</div>";
+            return html;
+        };
+
+        var formatFile = function(file, i) {
+            var html = "<div class='panel panel-default'>" +
+                       "<div class='panel-heading' role='tab' id='heading" + i + "'>" +
+                       "<h4 class='panel-title'>" +
+                       "<a class='collapsed' role='button' data-toggle='collapse' " +
+                       "data-parent='#zip-accordion' href='#collapse" + i + "' " +
+                       "aria-expanded='true' aria-controls='collapse" + i +"'>" +
+                       file.fileName +
+                       "<span class='pull-right'>" +
+                       // These are for formatting when stripping HTML
+                       "<span style='display: none'>\n</span>" +
+                       file.size.toLocaleString() + " bytes" +
+                       "<span style='display: none'>\n</span>" +
+                       "</span>" +
+                       "</a>" +
+                       "</h4>" +
+                       "</div>" +
+                       "<div id='collapse" + i + "' class='panel-collapse collapse' " +
+                       "role='tabpanel' aria-labelledby='heading" + i + "'>" +
+                       "<div class='panel-body'>" +
+                       "<pre><code>" + Utils.escapeHtml(file.contents) + "</pre></code></div>" +
+                       "</div>" +
+                       "</div>";
+            return html;
+        };
+
+        var Utils = this;
+        var html = "";
+        files.forEach(function(file, i) {
+            if(typeof file.contents !== "undefined") {
+                html += formatFile(file, i);
+            } else {
+                html += formatDirectory(file);
+            }
+        });
+        return html;
+    },
+
+
     /**
      * A mapping of names of delimiter characters to their symbols.
      * @constant
diff --git a/src/js/operations/Compress.js b/src/js/operations/Compress.js
index b5a2e6a1..b8a78300 100755
--- a/src/js/operations/Compress.js
+++ b/src/js/operations/Compress.js
@@ -345,5 +345,113 @@ var Compress = {
         plain = bzip2.simple(bzip2Reader);
         return plain;
     },
-    
+
+
+    /**
+     * @constant
+     * @default
+     */
+    TAR_FILENAME: "file.txt",
+
+
+    /**
+     * Tar unpack operation.
+     *
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    tar: function(input, args) {
+        // Not implemented yet
+        return input;
+    },
+
+
+    /**
+     * Untar unpack operation.
+     *
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {html}
+     */
+    untar: function(input, args) {
+        var Stream = function(input) {
+            this.bytes = input;
+            this.position = 0;
+        };
+
+        Stream.prototype.readString = function(numBytes) {
+            var result = "";
+            for(var i = this.position; i < this.position + numBytes; i++) {
+                var currentByte = this.bytes[i];
+                if(currentByte === 0) break;
+                result += String.fromCharCode(currentByte);
+            }
+            this.position += numBytes;
+            return result;
+        };
+
+        Stream.prototype.readInt = function(numBytes, base) {
+            var string = this.readString(numBytes);
+            return parseInt(string, base);
+        };
+
+        Stream.prototype.hasMore = function() {
+            return this.position < this.bytes.length;
+        };
+
+        var stream = new Stream(input),
+            files = [];
+
+        while(stream.hasMore()) {
+            var dataPosition = stream.position + 512;
+
+            var file = {
+                fileName: stream.readString(100),
+                fileMode: stream.readString(8),
+                ownerUID: stream.readString(8),
+                ownerGID: stream.readString(8),
+                size: parseInt(stream.readString(12), 8), // Octal
+                lastModTime: new Date(1000 * stream.readInt(12, 8)), // Octal
+                checksum: stream.readString(8),
+                type: stream.readString(1),
+                linkedFileName: stream.readString(100),
+                USTARFormat: stream.readString(6).indexOf("ustar") >= 0,
+            };
+
+            if(file.USTARFormat) {
+                file.version = stream.readString(2);
+                file.ownerUserName = stream.readString(32);
+                file.ownerGroupName = stream.readString(32);
+                file.deviceMajor = stream.readString(8);
+                file.deviceMinor = stream.readString(8);
+                file.filenamePrefix = stream.readString(155);
+            }
+
+            stream.position = dataPosition;
+
+            if(file.type === "0") {
+                // File
+                files.push(file);
+                var endPosition = stream.position + file.size;
+                if(file.size % 512 !== 0) {
+                    endPosition += 512 - (file.size % 512);
+                }
+
+                file.contents = "";
+
+                while(stream.position < endPosition) {
+                    file.contents += stream.readString(512);
+                }
+            } else if(file.type === "5") {
+                // Directory
+                files.push(file);
+            } else {
+                // Symlink or empty bytes
+            }
+        }
+
+        var output = Utils.HTMLFiles(files);
+        return output;
+    },
 };