diff --git a/packages/browser/src/index.ts b/packages/browser/src/index.ts
index 6031e81..023d1d2 100644
--- a/packages/browser/src/index.ts
+++ b/packages/browser/src/index.ts
@@ -57,6 +57,7 @@ export {default as resolveEmojiUrisInHtml} from './utils/resolveEmojiUrisInHtml'
 export {default as isAvatarUri, AVATAR_URI_SCHEME} from './utils/isAvatarUri';
 export {default as extractAvatarParamsFromUri} from './utils/extractAvatarParamsFromUri';
 export type {AvatarParams, AvatarShape, AvatarVariant} from './utils/extractAvatarParamsFromUri';
+export {default as buildAvatarSpec} from './utils/buildAvatarSpec';
 export {
   default as generateAvatarDataUri,
   deriveAvatarContent,
diff --git a/packages/browser/src/utils/buildAvatarSpec.ts b/packages/browser/src/utils/buildAvatarSpec.ts
new file mode 100644
index 0000000..14155e9
--- /dev/null
+++ b/packages/browser/src/utils/buildAvatarSpec.ts
@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) 2026, WSO2 LLC. (https://www.wso2.com).
+ *
+ * WSO2 LLC. licenses this file to you under the Apache License,
+ * Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import type {AvatarParams} from './extractAvatarParamsFromUri';
+import {AVATAR_URI_SCHEME} from './isAvatarUri';
+
+/**
+ * Serializes {@link AvatarParams} into an `avatar:` URI, the inverse of
+ * {@link extractAvatarParamsFromUri}.
+ *
+ * @param params - The avatar parameters to serialize.
+ * @returns An `"avatar:shape=...,variant=...,content=...,colors=..."` spec string, with a
+ * trailing `,bg=...` when {@link AvatarParams.bg} is set.
+ *
+ * @example
+ * ```typescript
+ * buildAvatarSpec({shape: 'circle', variant: 'two_letter', content: 'BM', colors: 2});
+ * // "avatar:shape=circle,variant=two_letter,content=BM,colors=2"
+ * ```
+ */
+const buildAvatarSpec = ({shape, variant, content, colors, bg}: AvatarParams): string => {
+  const base = `${AVATAR_URI_SCHEME}shape=${shape},variant=${variant},content=${content},colors=${colors}`;
+  return bg ? `${base},bg=${bg}` : base;
+};
+
+export default buildAvatarSpec;
diff --git a/packages/react/src/index.ts b/packages/react/src/index.ts
index 4480a78..796daaa 100644
--- a/packages/react/src/index.ts
+++ b/packages/react/src/index.ts
@@ -257,6 +257,22 @@ export {
   extractEmojiFromUri,
   resolveLogoUri,
   type ResolvedLogo,
+  isAvatarUri,
+  AVATAR_URI_SCHEME,
+  extractAvatarParamsFromUri,
+  type AvatarParams,
+  type AvatarShape,
+  type AvatarVariant,
+  buildAvatarSpec,
+  generateAvatarDataUri,
+  deriveAvatarContent,
+  AVATAR_GRADIENT_COUNT,
+  pickAnonymousAvatarName,
+  pickAnonymousEntityName,
+  ANONYMOUS_ANIMAL_ICONS,
+  type AnonymousAnimalIcon,
+  ANONYMOUS_ENTITY_ICONS,
+  type AnonymousEntityIcon,
   resolveMeta,
   resolveFlowTemplateLiterals,
   countryCodeToFlagEmoji,