diff --git a/src/core/Ingredient.mjs b/src/core/Ingredient.mjs
index d64bf763ba..319dfb158b 100755
--- a/src/core/Ingredient.mjs
+++ b/src/core/Ingredient.mjs
@@ -27,6 +27,7 @@ class Ingredient {
         this.toggleValues = [];
         this.target = null;
         this.defaultIndex = 0;
+        this.maxLength = null;
         this.min = null;
         this.max = null;
         this.step = 1;
@@ -53,6 +54,7 @@ class Ingredient {
         this.toggleValues = ingredientConfig.toggleValues;
         this.target = typeof ingredientConfig.target !== "undefined" ? ingredientConfig.target : null;
         this.defaultIndex = typeof ingredientConfig.defaultIndex !== "undefined" ? ingredientConfig.defaultIndex : 0;
+        this.maxLength = ingredientConfig.maxLength || null;
         this.min = ingredientConfig.min;
         this.max = ingredientConfig.max;
         this.step = ingredientConfig.step;
diff --git a/src/core/Operation.mjs b/src/core/Operation.mjs
index 32ecff07ca..24739d3f78 100755
--- a/src/core/Operation.mjs
+++ b/src/core/Operation.mjs
@@ -184,6 +184,7 @@ class Operation {
             if (ing.disabled) conf.disabled = ing.disabled;
             if (ing.target) conf.target = ing.target;
             if (ing.defaultIndex) conf.defaultIndex = ing.defaultIndex;
+            if (ing.maxLength) conf.maxLength = ing.maxLength;
             if (typeof ing.min === "number") conf.min = ing.min;
             if (typeof ing.max === "number") conf.max = ing.max;
             if (ing.step) conf.step = ing.step;
diff --git a/src/core/operations/FromBase85.mjs b/src/core/operations/FromBase85.mjs
index aef1663892..d0c70da5a1 100644
--- a/src/core/operations/FromBase85.mjs
+++ b/src/core/operations/FromBase85.mjs
@@ -7,7 +7,7 @@
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
 import Utils from "../Utils.mjs";
-import {alphabetName, ALPHABET_OPTIONS} from "../lib/Base85.mjs";
+import {ALPHABET_OPTIONS} from "../lib/Base85.mjs";
 
 /**
  * From Base85 operation
@@ -40,8 +40,9 @@ class FromBase85 extends Operation {
             {
                 name: "All-zero group char",
                 type: "binaryShortString",
-                value: "z"
-            },
+                value: "z",
+                maxLength: 1
+            }
         ];
         this.checks = [
             {
@@ -81,9 +82,8 @@ class FromBase85 extends Operation {
      */
     run(input, args) {
         const alphabet = Utils.expandAlphRange(args[0]).join(""),
-            encoding = alphabetName(alphabet),
             removeNonAlphChars = args[1],
-            allZeroGroupChar = args[2],
+            allZeroGroupChar = typeof args[2] === "string" ? args[2].slice(0, 1) : "",
             result = [];
 
         if (alphabet.length !== 85 ||
@@ -91,6 +91,10 @@ class FromBase85 extends Operation {
             throw new OperationError("Alphabet must be of length 85");
         }
 
+        if (allZeroGroupChar && alphabet.includes(allZeroGroupChar)) {
+            throw new OperationError("The all-zero group char cannot appear in the alphabet");
+        }
+
         // Remove delimiters if present
         const matches = input.match(/^<~(.+?)~>$/);
         if (matches !== null) input = matches[1];
@@ -109,7 +113,7 @@ class FromBase85 extends Operation {
         let i = 0;
         let block, blockBytes;
         while (i < input.length) {
-            if (encoding === "Standard" && input[i] === allZeroGroupChar) {
+            if (input[i] === allZeroGroupChar) {
                 result.push(0, 0, 0, 0);
                 i++;
             } else {
diff --git a/src/web/HTMLIngredient.mjs b/src/web/HTMLIngredient.mjs
index 2c638405c6..6d9ccdbfdf 100755
--- a/src/web/HTMLIngredient.mjs
+++ b/src/web/HTMLIngredient.mjs
@@ -30,6 +30,7 @@ class HTMLIngredient {
         this.rows = config.rows || false;
         this.target = config.target;
         this.defaultIndex = config.defaultIndex || 0;
+        this.maxLength = config.maxLength || null;
         this.toggleValues = config.toggleValues;
         this.ingId = this.app.nextIngId();
         this.id = "ing-" + this.ingId;
@@ -63,7 +64,8 @@ class HTMLIngredient {
                         tabindex="${this.tabIndex}"
                         arg-name="${this.name}"
                         value="${this.value}"
-                        ${this.disabled ? "disabled" : ""}>
+                        ${this.disabled ? "disabled" : ""}
+                        ${this.maxLength ? `maxlength="${this.maxLength}"` : ""}>
                 </div>`;
                 break;
             case "shortString":
@@ -78,7 +80,8 @@ class HTMLIngredient {
                         tabindex="${this.tabIndex}"
                         arg-name="${this.name}"
                         value="${this.value}"
-                        ${this.disabled ? "disabled" : ""}>
+                        ${this.disabled ? "disabled" : ""}
+                        ${this.maxLength ? `maxlength="${this.maxLength}"` : ""}>
                 </div>`;
                 break;
             case "toggleString":
@@ -93,7 +96,8 @@ class HTMLIngredient {
                             tabindex="${this.tabIndex}"
                             arg-name="${this.name}"
                             value="${this.value}"
-                            ${this.disabled ? "disabled" : ""}>
+                            ${this.disabled ? "disabled" : ""}
+                            ${this.maxLength ? `maxlength="${this.maxLength}"` : ""}>
                     </div>
                     <div class="input-group-append">
                         <button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">${this.toggleValues[0]}</button>