diff --git a/ts/Bytes.ts b/ts/Bytes.ts
index d843e1e4cb2..ab89b54be34 100644
--- a/ts/Bytes.ts
+++ b/ts/Bytes.ts
@@ -37,6 +37,10 @@ export function toString(data: Uint8Array): string {
   return bytes.toString(data);
 }
 
+export function byteLength(value: string): number {
+  return bytes.byteLength(value);
+}
+
 export function concatenate(list: ReadonlyArray<Uint8Array>): Uint8Array {
   return bytes.concatenate(list);
 }
diff --git a/ts/components/GroupDescriptionInput.tsx b/ts/components/GroupDescriptionInput.tsx
index ec467e3d321..bd3ea60ef03 100644
--- a/ts/components/GroupDescriptionInput.tsx
+++ b/ts/components/GroupDescriptionInput.tsx
@@ -22,10 +22,11 @@ export const GroupDescriptionInput = forwardRef<HTMLInputElement, PropsType>(
         i18n={i18n}
         onChange={onChangeValue}
         placeholder={i18n('setGroupMetadata__group-description-placeholder')}
-        maxLengthCount={256}
+        maxLengthCount={480}
+        maxByteCount={8192}
         ref={ref}
         value={value}
-        whenToShowRemainingCount={150}
+        whenToShowRemainingCount={380}
       />
     );
   }
diff --git a/ts/components/Input.tsx b/ts/components/Input.tsx
index e9bdf5e9838..462fed8edb5 100644
--- a/ts/components/Input.tsx
+++ b/ts/components/Input.tsx
@@ -16,15 +16,18 @@ import * as grapheme from '../util/grapheme';
 import { LocalizerType } from '../types/Util';
 import { getClassNamesFor } from '../util/getClassNamesFor';
 import { refMerger } from '../util/refMerger';
+import { byteLength } from '../Bytes';
 
 export type PropsType = {
   countLength?: (value: string) => number;
+  countBytes?: (value: string) => number;
   disabled?: boolean;
   expandable?: boolean;
   hasClearButton?: boolean;
   i18n: LocalizerType;
   icon?: ReactNode;
   maxLengthCount?: number;
+  maxByteCount?: number;
   moduleClassName?: string;
   onChange: (value: string) => unknown;
   placeholder: string;
@@ -56,12 +59,14 @@ export const Input = forwardRef<
   (
     {
       countLength = grapheme.count,
+      countBytes = byteLength,
       disabled,
       expandable,
       hasClearButton,
       i18n,
       icon,
       maxLengthCount = 0,
+      maxByteCount = 0,
       moduleClassName,
       onChange,
       placeholder,
@@ -114,8 +119,9 @@ export const Input = forwardRef<
       const newValue = inputEl.value;
 
       const newLengthCount = maxLengthCount ? countLength(newValue) : 0;
+      const newByteCount = maxByteCount ? countBytes(newValue) : 0;
 
-      if (newLengthCount <= maxLengthCount) {
+      if (newLengthCount <= maxLengthCount && newByteCount <= maxByteCount) {
         onChange(newValue);
       } else {
         inputEl.value = valueOnKeydownRef.current;
@@ -124,12 +130,19 @@ export const Input = forwardRef<
       }
 
       maybeSetLarge();
-    }, [countLength, maxLengthCount, maybeSetLarge, onChange]);
+    }, [
+      countLength,
+      countBytes,
+      maxLengthCount,
+      maxByteCount,
+      maybeSetLarge,
+      onChange,
+    ]);
 
     const handlePaste = useCallback(
       (event: ClipboardEvent<HTMLInputElement | HTMLTextAreaElement>) => {
         const inputEl = innerRef.current;
-        if (!inputEl || !maxLengthCount) {
+        if (!inputEl || !maxLengthCount || !maxByteCount) {
           return;
         }
 
@@ -145,14 +158,25 @@ export const Input = forwardRef<
           countLength(textBeforeSelection) +
           countLength(pastedText) +
           countLength(textAfterSelection);
+        const newByteCount =
+          countBytes(textBeforeSelection) +
+          countBytes(pastedText) +
+          countBytes(textAfterSelection);
 
-        if (newLengthCount > maxLengthCount) {
+        if (newLengthCount > maxLengthCount || newByteCount > maxByteCount) {
           event.preventDefault();
         }
 
         maybeSetLarge();
       },
-      [countLength, maxLengthCount, maybeSetLarge, value]
+      [
+        countLength,
+        countBytes,
+        maxLengthCount,
+        maxByteCount,
+        maybeSetLarge,
+        value,
+      ]
     );
 
     useEffect(() => {
diff --git a/ts/components/ProfileEditor.tsx b/ts/components/ProfileEditor.tsx
index 729ec118e7a..cca98217a70 100644
--- a/ts/components/ProfileEditor.tsx
+++ b/ts/components/ProfileEditor.tsx
@@ -161,20 +161,6 @@ export const ProfileEditor = ({
     [onProfileChanged, stagedProfile]
   );
 
-  const getTextEncoder = useCallback(() => new TextEncoder(), []);
-
-  const countByteLength = useCallback(
-    (str: string) => getTextEncoder().encode(str).byteLength,
-    [getTextEncoder]
-  );
-
-  const calculateLengthCount = useCallback(
-    (name = '') => {
-      return 256 - countByteLength(name);
-    },
-    [countByteLength]
-  );
-
   const getFullNameText = () => {
     return [fullName.firstName, fullName.familyName].filter(Boolean).join(' ');
   };
@@ -225,9 +211,9 @@ export const ProfileEditor = ({
     content = (
       <>
         <Input
-          countLength={countByteLength}
           i18n={i18n}
-          maxLengthCount={calculateLengthCount(stagedProfile.familyName)}
+          maxLengthCount={26}
+          maxByteCount={128}
           whenToShowRemainingCount={0}
           onChange={newFirstName => {
             setStagedProfile(profileData => ({
@@ -240,9 +226,9 @@ export const ProfileEditor = ({
           value={stagedProfile.firstName}
         />
         <Input
-          countLength={countByteLength}
           i18n={i18n}
-          maxLengthCount={calculateLengthCount(stagedProfile.firstName)}
+          maxLengthCount={26}
+          maxByteCount={128}
           whenToShowRemainingCount={0}
           onChange={newFamilyName => {
             setStagedProfile(profileData => ({
@@ -323,6 +309,7 @@ export const ProfileEditor = ({
             </div>
           }
           maxLengthCount={140}
+          maxByteCount={512}
           moduleClassName="ProfileEditor__about-input"
           onChange={value => {
             if (value) {
diff --git a/ts/context/Bytes.ts b/ts/context/Bytes.ts
index 1c8b6a4b752..636d0183ebd 100644
--- a/ts/context/Bytes.ts
+++ b/ts/context/Bytes.ts
@@ -40,6 +40,10 @@ export class Bytes {
     return Buffer.from(data).toString();
   }
 
+  public byteLength(value: string): number {
+    return Buffer.byteLength(value);
+  }
+
   public concatenate(list: ReadonlyArray<Uint8Array>): Uint8Array {
     return Buffer.concat(list);
   }