diff --git a/README.md b/README.md
index 74a2f7be0..f13deb399 100644
--- a/README.md
+++ b/README.md
@@ -192,6 +192,10 @@ via an optional `callback` argument. The callback support is now deprecated:
 new methods do not include a `callback` argument, and in the future it may be
 removed from existing methods.
 
+## Low level types
+
+There are some low level TypeScript types exported via the `matrix-js-sdk/lib/types` entrypoint to not bloat the main entrypoint.
+
 ## Examples
 
 This section provides some useful code snippets which demonstrate the
diff --git a/src/@types/media.ts b/src/@types/media.ts
new file mode 100644
index 000000000..20e5ca6c6
--- /dev/null
+++ b/src/@types/media.ts
@@ -0,0 +1,252 @@
+/*
+Copyright 2024 The Matrix.org Foundation C.I.C.
+
+Licensed 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 { MsgType } from "../@types/event";
+
+/**
+ * Information on encrypted media attachments.
+ *
+ * Used within `m.room.message` events that reference files, such as `m.file` and `m.image`.
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#extensions-to-mroommessage-msgtypes
+ */
+export interface EncryptedFile {
+    /**
+     * The URL to the file.
+     */
+    url: string;
+    /**
+     * A JSON Web Key object.
+     */
+    key: {
+        alg: string;
+        key_ops: string[]; // eslint-disable-line camelcase
+        kty: string;
+        k: string;
+        ext: boolean;
+    };
+    /**
+     * The 128-bit unique counter block used by AES-CTR, encoded as unpadded base64.
+     */
+    iv: string;
+    /**
+     * A map from an algorithm name to a hash of the ciphertext, encoded as unpadded base64.
+     * Clients should support the SHA-256 hash, which uses the key `sha256`.
+     */
+    hashes: { [alg: string]: string };
+    /**
+     * Version of the encrypted attachment's protocol. Must be `v2`.
+     */
+    v: string;
+}
+
+interface ThumbnailInfo {
+    /**
+     * The mimetype of the image, e.g. image/jpeg.
+     */
+    mimetype?: string;
+    /**
+     * The intended display width of the image in pixels.
+     * This may differ from the intrinsic dimensions of the image file.
+     */
+    w?: number;
+    /**
+     * The intended display height of the image in pixels.
+     * This may differ from the intrinsic dimensions of the image file.
+     */
+    h?: number;
+    /**
+     * Size of the image in bytes.
+     */
+    size?: number;
+}
+
+interface BaseInfo {
+    mimetype?: string;
+    size?: number;
+}
+
+/**
+ * Information on media attachments of msgtype `m.file`
+ *
+ * Used within `m.room.message` events that reference files.
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#mfile
+ */
+export interface FileInfo extends BaseInfo {
+    /**
+     * Information on the encrypted thumbnail file, as specified in End-to-end encryption.
+     * Only present if the thumbnail is encrypted.
+     * @see https://spec.matrix.org/v1.9/client-server-api/#sending-encrypted-attachments
+     */
+    thumbnail_file?: EncryptedFile;
+    /**
+     * Metadata about the image referred to in thumbnail_url.
+     */
+    thumbnail_info?: ThumbnailInfo;
+    /**
+     * The URL to the thumbnail of the file. Only present if the thumbnail is unencrypted.
+     */
+    thumbnail_url?: string;
+}
+
+/**
+ * Information on media attachments of msgtype `m.image`
+ *
+ * Used within `m.room.message` events that reference images.
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#mimage
+ */
+export interface ImageInfo extends FileInfo, ThumbnailInfo {}
+
+/**
+ * Information on media attachments of msgtype `m.audio`
+ *
+ * Used within `m.room.message` events that reference audio files.
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#maudio
+ */
+export interface AudioInfo extends BaseInfo {
+    /**
+     * The duration of the audio in milliseconds.
+     */
+    duration?: number;
+}
+
+/**
+ * Information on media attachments of msgtype `m.video`
+ *
+ * Used within `m.room.message` events that reference video files.
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#mvideo
+ */
+export interface VideoInfo extends AudioInfo, ImageInfo {
+    /**
+     * The duration of the video in milliseconds.
+     */
+    duration?: number;
+}
+
+/**
+ * Union type representing the `content.info` field of all specified media events.
+ */
+export type MediaEventInfo = FileInfo | ImageInfo | AudioInfo | VideoInfo;
+
+interface BaseContent {
+    /**
+     * Required if the file is encrypted. Information on the encrypted file, as specified in End-to-end encryption.
+     * @see https://spec.matrix.org/v1.9/client-server-api/#sending-encrypted-attachments
+     */
+    file?: EncryptedFile;
+    /**
+     * Required if the file is unencrypted. The URL (typically mxc:// URI) to the file.
+     */
+    url?: string;
+}
+
+/**
+ * Content format of media events with msgtype `m.file`
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#mfile
+ */
+export interface FileContent extends BaseContent {
+    /**
+     * A human-readable description of the file.
+     * This is recommended to be the filename of the original upload.
+     */
+    body: string;
+    /**
+     * The original filename of the uploaded file.
+     */
+    filename?: string;
+    /**
+     * Information about the file referred to in url.
+     */
+    info?: FileInfo;
+    /**
+     * One of: [m.file].
+     */
+    msgtype: MsgType.File;
+}
+
+/**
+ * Content format of media events with msgtype `m.image`
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#mimage
+ */
+export interface ImageContent extends BaseContent {
+    /**
+     * A textual representation of the image.
+     * This could be the alt text of the image, the filename of the image,
+     * or some kind of content description for accessibility e.g. ‘image attachment’.
+     */
+    body: string;
+    /**
+     * Metadata about the image referred to in url.
+     */
+    info?: ImageInfo;
+    /**
+     * One of: [m.image].
+     */
+    msgtype: MsgType.Image;
+}
+
+/**
+ * Content format of media events with msgtype `m.audio`
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#maudio
+ */
+export interface AudioContent extends BaseContent {
+    /**
+     * A description of the audio e.g. ‘Bee Gees - Stayin’ Alive’,
+     * or some kind of content description for accessibility e.g. ‘audio attachment’.
+     */
+    body: string;
+    /**
+     * Metadata for the audio clip referred to in url.
+     */
+    info?: AudioInfo;
+    /**
+     * One of: [m.audio].
+     */
+    msgtype: MsgType.Audio;
+}
+
+/**
+ * Content format of media events with msgtype `m.video`
+ *
+ * @see https://spec.matrix.org/v1.9/client-server-api/#mvideo
+ */
+export interface VideoContent extends BaseContent {
+    /**
+     * A description of the video e.g. ‘Gangnam style’,
+     * or some kind of content description for accessibility e.g. ‘video attachment’.
+     */
+    body: string;
+    /**
+     * Metadata about the video clip referred to in url.
+     */
+    info?: VideoInfo;
+    /**
+     * One of: [m.video].
+     */
+    msgtype: MsgType.Video;
+}
+
+/**
+ * Type representing media event contents for `m.room.message` events listed in the Matrix specification
+ */
+export type MediaEventContent = FileContent | ImageContent | AudioContent | VideoContent;
diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 000000000..dd2d3bef8
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,24 @@
+/*
+Copyright 2024 The Matrix.org Foundation C.I.C.
+
+Licensed 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.
+*/
+
+/*
+ * This file is a secondary entrypoint for the js-sdk library, for use by Typescript projects.
+ * It exposes low-level types and interfaces reflecting structures defined in the Matrix specification.
+ *
+ * Remember to only export *public* types from this file.
+ */
+
+export type * from "./@types/media";
diff --git a/typedoc.json b/typedoc.json
index 020431cea..017c3a4d6 100644
--- a/typedoc.json
+++ b/typedoc.json
@@ -2,7 +2,7 @@
     "$schema": "https://typedoc.org/schema.json",
     "plugin": ["typedoc-plugin-mdn-links", "typedoc-plugin-missing-exports", "typedoc-plugin-coverage"],
     "coverageLabel": "TypeDoc",
-    "entryPoints": ["src/matrix.ts"],
+    "entryPoints": ["src/matrix.ts", "src/types.ts"],
     "excludeExternals": true,
     "out": "_docs"
 }