diff --git a/codecs/codecs.js b/codecs/codecs.js
index 7c8a1d4..00b5735 100644
--- a/codecs/codecs.js
+++ b/codecs/codecs.js
@@ -12,7 +12,7 @@
  */
 
 /**
- * @typdef ProbeStream ffprobe -show_streams -print_format json. Only the fields we care about.
+ * @typedef ProbeStream ffprobe -show_streams -print_format json. Only the fields we care about.
  * @property {number} index
  * @property {string} codec_name
  * @property {string} codec_long_name
diff --git a/image/webp-shim/webp-shim.js b/image/webp-shim/webp-shim.js
index 0878576..f9f607b 100644
--- a/image/webp-shim/webp-shim.js
+++ b/image/webp-shim/webp-shim.js
@@ -47,7 +47,7 @@ function loadWebPShimApi() {
 }
 
 /**
- * @param {ArrayBuffer|TypedArray} webpBuffer The byte array containing the WebP image bytes.
+ * @param {ArrayBuffer|Uint8Array} webpBuffer The byte array containing the WebP image bytes.
  * @returns {Promise<ArrayBuffer>} A Promise resolving to a byte array containing the PNG bytes.
  */
 export function convertWebPtoPNG(webpBuffer) {
@@ -76,7 +76,7 @@ export function convertWebPtoPNG(webpBuffer) {
 }
 
 /**
- * @param {ArrayBuffer|TypedArray} webpBuffer The byte array containing the WebP image bytes.
+ * @param {ArrayBuffer|Uint8Array} webpBuffer The byte array containing the WebP image bytes.
  * @returns {Promise<ArrayBuffer>} A Promise resolving to a byte array containing the JPG bytes.
  */
 export function convertWebPtoJPG(webpBuffer) {
diff --git a/index.js b/index.js
index 2bfa25b..e1b106b 100644
--- a/index.js
+++ b/index.js
@@ -6,11 +6,22 @@
  * Copyright(c) 2020 Google Inc.
  */
 
+/**
+ * @typedef {import('./codecs/codecs.js').ProbeStream} ProbeStream
+ */
+/**
+ * @typedef {import('./codecs/codecs.js').ProbeFormat} ProbeFormat
+ */
+/**
+ * @typedef {import('./codecs/codecs.js').ProbeInfo} ProbeInfo
+ */
+
 export {
   UnarchiveEvent, UnarchiveEventType, UnarchiveInfoEvent, UnarchiveErrorEvent,
   UnarchiveStartEvent, UnarchiveFinishEvent, UnarchiveProgressEvent, UnarchiveExtractEvent,
   Unarchiver, Unzipper, Unrarrer, Untarrer, getUnarchiver
 } from './archive/archive.js';
+export { getFullMIMEString, getShortMIMEString } from './codecs/codecs.js';
 export { findMimeType } from './file/sniffer.js';
 export { convertWebPtoPNG, convertWebPtoJPG } from './image/webp-shim/webp-shim.js';
 export { BitStream } from './io/bitstream.js';
diff --git a/package.json b/package.json
index fd98dbf..6a736cf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@codedread/bitjs",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "Binary Tools for JavaScript",
   "homepage": "https://github.com/codedread/bitjs",
   "author": "Jeff Schiller",
@@ -24,6 +24,7 @@
   ],
   "main": "./index.js",
   "type": "module",
+  "types": "types/index.d.ts",
   "exports": "./index.js",
   "repository": {
     "type": "git",
@@ -42,7 +43,8 @@
   },
   "devDependencies": {
     "chai": "^4.3.4",
-    "mocha": "^8.4.0"
+    "mocha": "^8.4.0",
+    "typescript": "^4.8.0"
   },
   "dependencies": {}
 }
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..8a871a8
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,22 @@
+{
+  // Change this to match your project
+  "include": ["index.js"],
+  "exclude": [],
+  "compilerOptions": {
+    // Tells TypeScript to read JS files, as
+    // normally they are ignored as source files
+    "allowJs": true,
+    // Generate d.ts files
+    "declaration": true,
+    // This compiler run should
+    // only output d.ts files
+    "emitDeclarationOnly": true,
+    // Types should go into this directory.
+    // Removing this would place the .d.ts files
+    // next to the .js files
+    "outDir": "types",
+    // go to js file when using IDE functions like
+    // "Go to Definition" in VSCode
+    "declarationMap": true
+  }
+}
diff --git a/types/archive/archive.d.ts b/types/archive/archive.d.ts
new file mode 100644
index 0000000..10d7710
--- /dev/null
+++ b/types/archive/archive.d.ts
@@ -0,0 +1,39 @@
+/**
+ * Factory method that creates an unarchiver based on the byte signature found
+ * in the arrayBuffer.
+ * @param {ArrayBuffer} ab The ArrayBuffer to unarchive. Note that this ArrayBuffer
+ *     must not be referenced after calling this method, as the ArrayBuffer is marked
+ *     as Transferable and sent to a Worker thread once start() is called.
+ * @param {Object|string} options An optional object of options, or a string
+ *     representing where the path to the unarchiver script files.
+ * @returns {Unarchiver}
+ */
+export function getUnarchiver(ab: ArrayBuffer, options?: any | string): Unarchiver;
+export class Unzipper extends UnzipperInternal {
+    constructor(ab: any, options: any);
+}
+export class Unrarrer extends UnrarrerInternal {
+    constructor(ab: any, options: any);
+}
+export class Untarrer extends UntarrerInternal {
+    constructor(ab: any, options: any);
+}
+export type UnarchivedFile = {
+    filename: string;
+    fileData: Uint8Array;
+};
+import { Unarchiver } from "./decompress-internal.js";
+import { UnarchiveAppendEvent } from "./decompress-internal.js";
+import { UnarchiveErrorEvent } from "./decompress-internal.js";
+import { UnarchiveEvent } from "./decompress-internal.js";
+import { UnarchiveEventType } from "./decompress-internal.js";
+import { UnarchiveExtractEvent } from "./decompress-internal.js";
+import { UnarchiveFinishEvent } from "./decompress-internal.js";
+import { UnarchiveInfoEvent } from "./decompress-internal.js";
+import { UnarchiveProgressEvent } from "./decompress-internal.js";
+import { UnarchiveStartEvent } from "./decompress-internal.js";
+import { UnzipperInternal } from "./decompress-internal.js";
+import { UnrarrerInternal } from "./decompress-internal.js";
+import { UntarrerInternal } from "./decompress-internal.js";
+export { UnarchiveAppendEvent, UnarchiveErrorEvent, UnarchiveEvent, UnarchiveEventType, UnarchiveExtractEvent, UnarchiveFinishEvent, UnarchiveInfoEvent, UnarchiveProgressEvent, UnarchiveStartEvent, Unarchiver };
+//# sourceMappingURL=archive.d.ts.map
\ No newline at end of file
diff --git a/types/archive/archive.d.ts.map b/types/archive/archive.d.ts.map
new file mode 100644
index 0000000..0ff66e4
--- /dev/null
+++ b/types/archive/archive.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"archive.d.ts","sourceRoot":"","sources":["../../archive/archive.js"],"names":[],"mappings":"AA0EA;;;;;;;;;GASG;AACH,kCAPW,WAAW,YAGX,MAAO,MAAM,GAEX,UAAU,CAItB;AAxBD;IACE,mCAAgE;CACjE;AAED;IACE,mCAAgE;CACjE;AAED;IACE,mCAAgE;CACjE;;cAjCa,MAAM;cACN,UAAU"}
\ No newline at end of file
diff --git a/types/archive/decompress-internal.d.ts b/types/archive/decompress-internal.d.ts
new file mode 100644
index 0000000..dba2bf9
--- /dev/null
+++ b/types/archive/decompress-internal.d.ts
@@ -0,0 +1,245 @@
+/**
+ * Factory method that creates an unarchiver based on the byte signature found
+ * in the arrayBuffer.
+ * @param {ArrayBuffer} ab
+ * @param {Function(string):Worker} createWorkerFn A function that creates a Worker from a script file.
+ * @param {Object|string} options An optional object of options, or a string representing where
+ *     the path to the unarchiver script files.
+ * @returns {Unarchiver}
+ */
+export function getUnarchiverInternal(ab: ArrayBuffer, createWorkerFn: any, options?: any | string): Unarchiver;
+export namespace UnarchiveEventType {
+    const START: string;
+    const APPEND: string;
+    const PROGRESS: string;
+    const EXTRACT: string;
+    const FINISH: string;
+    const INFO: string;
+    const ERROR: string;
+}
+/**
+ * An unarchive event.
+ */
+export class UnarchiveEvent {
+    /**
+     * @param {string} type The event type.
+     */
+    constructor(type: string);
+    /**
+     * The event type.
+     * @type {string}
+     */
+    type: string;
+}
+/**
+ * Updates all Archiver listeners that an append has occurred.
+ */
+export class UnarchiveAppendEvent extends UnarchiveEvent {
+    /**
+     * @param {number} numBytes The number of bytes appended.
+     */
+    constructor(numBytes: number);
+    /**
+     * The number of appended bytes.
+     * @type {number}
+     */
+    numBytes: number;
+}
+/**
+ * Useful for passing info up to the client (for debugging).
+ */
+export class UnarchiveInfoEvent extends UnarchiveEvent {
+    /**
+     * The information message.
+     * @type {string}
+     */
+    msg: string;
+}
+/**
+ * An unrecoverable error has occured.
+ */
+export class UnarchiveErrorEvent extends UnarchiveEvent {
+    /**
+     * The information message.
+     * @type {string}
+     */
+    msg: string;
+}
+/**
+ * Start event.
+ */
+export class UnarchiveStartEvent extends UnarchiveEvent {
+    constructor();
+}
+/**
+ * Finish event.
+ */
+export class UnarchiveFinishEvent extends UnarchiveEvent {
+    /**
+     * @param {Object} metadata A collection fo metadata about the archive file.
+     */
+    constructor(metadata?: any);
+    metadata: any;
+}
+/**
+ * Progress event.
+ */
+export class UnarchiveProgressEvent extends UnarchiveEvent {
+    /**
+     * @param {string} currentFilename
+     * @param {number} currentFileNumber
+     * @param {number} currentBytesUnarchivedInFile
+     * @param {number} currentBytesUnarchived
+     * @param {number} totalUncompressedBytesInArchive
+     * @param {number} totalFilesInArchive
+     * @param {number} totalCompressedBytesRead
+     */
+    constructor(currentFilename: string, currentFileNumber: number, currentBytesUnarchivedInFile: number, currentBytesUnarchived: number, totalUncompressedBytesInArchive: number, totalFilesInArchive: number, totalCompressedBytesRead: number);
+    currentFilename: string;
+    currentFileNumber: number;
+    currentBytesUnarchivedInFile: number;
+    totalFilesInArchive: number;
+    currentBytesUnarchived: number;
+    totalUncompressedBytesInArchive: number;
+    totalCompressedBytesRead: number;
+}
+/**
+ * Extract event.
+ */
+export class UnarchiveExtractEvent extends UnarchiveEvent {
+    /**
+     * @param {UnarchivedFile} unarchivedFile
+     */
+    constructor(unarchivedFile: UnarchivedFile);
+    /**
+     * @type {UnarchivedFile}
+     */
+    unarchivedFile: UnarchivedFile;
+}
+/**
+ * Base class for all Unarchivers.
+ * TODO: When EventTarget constructors are broadly supported, make this extend
+ *     EventTarget and remove event listener code.
+ *     https://caniuse.com/#feat=mdn-api_eventtarget_eventtarget
+ */
+export class Unarchiver {
+    /**
+     * @param {ArrayBuffer} arrayBuffer The Array Buffer. Note that this ArrayBuffer must not be
+     *     referenced once it is sent to the Unarchiver, since it is marked as Transferable and sent
+     *     to the Worker.
+     * @param {Function(string):Worker} createWorkerFn A function that creates a Worker from a script file.
+     * @param {Object|string} options An optional object of options, or a string representing where
+     *     the BitJS files are located.  The string version of this argument is deprecated.
+     *     Available options:
+     *       'pathToBitJS': A string indicating where the BitJS files are located.
+     *       'debug': A boolean where true indicates that the archivers should log debug output.
+     */
+    constructor(arrayBuffer: ArrayBuffer, createWorkerFn: any, options?: any | string);
+    /**
+     * The ArrayBuffer object.
+     * @type {ArrayBuffer}
+     * @protected
+     */
+    protected ab: ArrayBuffer;
+    /**
+     * A factory method that creates a Worker that does the unarchive work.
+     * @type {Function(string): Worker}
+     * @private
+     */
+    private createWorkerFn_;
+    /**
+     * The path to the BitJS files.
+     * @type {string}
+     * @private
+     */
+    private pathToBitJS_;
+    /**
+     * @orivate
+     * @type {boolean}
+     */
+    debugMode_: boolean;
+    /**
+     * A map from event type to an array of listeners.
+     * @private
+     * @type {Map.<string, Array>}
+     */
+    private listeners_;
+    /**
+     * Private web worker initialized during start().
+     * @private
+     * @type {Worker}
+     */
+    private worker_;
+    /**
+     * This method must be overridden by the subclass to return the script filename.
+     * @returns {string} The MIME type of the archive.
+     * @protected.
+     */
+    protected getMIMEType(): string;
+    /**
+     * This method must be overridden by the subclass to return the script filename.
+     * @returns {string} The script filename.
+     * @protected.
+     */
+    protected getScriptFileName(): string;
+    /**
+     * Adds an event listener for UnarchiveEvents.
+     *
+     * @param {string} Event type.
+     * @param {function} An event handler function.
+     */
+    addEventListener(type: any, listener: any): void;
+    /**
+     * Removes an event listener.
+     *
+     * @param {string} Event type.
+     * @param {EventListener|function} An event listener or handler function.
+     */
+    removeEventListener(type: any, listener: any): void;
+    /**
+     * Create an UnarchiveEvent out of the object sent back from the Worker.
+     * @param {Object} obj
+     * @returns {UnarchiveEvent}
+     * @private
+     */
+    private createUnarchiveEvent_;
+    /**
+     * Receive an event and pass it to the listener functions.
+     *
+     * @param {Object} obj
+     * @private
+     */
+    private handleWorkerEvent_;
+    /**
+     * Starts the unarchive in a separate Web Worker thread and returns immediately.
+     */
+    start(): void;
+    /**
+     * Adds more bytes to the unarchiver's Worker thread.
+     * @param {ArrayBuffer} ab The ArrayBuffer with more bytes in it. If opt_transferable is
+     *     set to true, this ArrayBuffer must not be referenced after calling update(), since it
+     *     is marked as Transferable and sent to the Worker.
+     * @param {boolean=} opt_transferable Optional boolean whether to mark this ArrayBuffer
+     *     as a Tranferable object, which means it can no longer be referenced outside of
+     *     the Worker thread.
+     */
+    update(ab: ArrayBuffer, opt_transferable?: boolean | undefined): void;
+    /**
+     * Terminates the Web Worker for this Unarchiver and returns immediately.
+     */
+    stop(): void;
+}
+export class UnzipperInternal extends Unarchiver {
+    constructor(arrayBuffer: any, createWorkerFn: any, options: any);
+}
+export class UnrarrerInternal extends Unarchiver {
+    constructor(arrayBuffer: any, createWorkerFn: any, options: any);
+}
+export class UntarrerInternal extends Unarchiver {
+    constructor(arrayBuffer: any, createWorkerFn: any, options: any);
+}
+export type UnarchivedFile = {
+    filename: string;
+    fileData: Uint8Array;
+};
+//# sourceMappingURL=decompress-internal.d.ts.map
\ No newline at end of file
diff --git a/types/archive/decompress-internal.d.ts.map b/types/archive/decompress-internal.d.ts.map
new file mode 100644
index 0000000..9fed7cc
--- /dev/null
+++ b/types/archive/decompress-internal.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"decompress-internal.d.ts","sourceRoot":"","sources":["../../archive/decompress-internal.js"],"names":[],"mappings":"AAgbA;;;;;;;;GAQG;AACF,0CANU,WAAW,iCAEX,MAAO,MAAM,GAEX,UAAU,CAkBtB;;;;;;;;;;AAzaD;;GAEG;AACF;IACC;;OAEG;IACH,kBAFW,MAAM,EAQhB;IALC;;;OAGG;IACH,MAFU,MAAM,CAEA;CAEnB;AAED;;GAEG;AACF;IACC;;OAEG;IACH,sBAFW,MAAM,EAUhB;IALC;;;OAGG;IACH,UAFU,MAAM,CAEQ;CAE3B;AAED;;GAEG;AACH;IAOI;;;OAGG;IACH,KAFU,MAAM,CAEF;CAEjB;AAED;;GAEG;AACH;IAOI;;;OAGG;IACH,KAFU,MAAM,CAEF;CAEjB;AAED;;GAEG;AACH;IACE,cAEC;CACF;AAED;;GAEG;AACH;IACE;;OAEG;IACH,4BAGC;IADC,cAAwB;CAE3B;AAED;;GAEG;AACH;IACE;;;;;;;;OAQG;IACH,6BARW,MAAM,qBACN,MAAM,gCACN,MAAM,0BACN,MAAM,mCACN,MAAM,uBACN,MAAM,4BACN,MAAM,EAchB;IAPC,wBAAsC;IACtC,0BAA0C;IAC1C,qCAAgE;IAChE,4BAA8C;IAC9C,+BAAoD;IACpD,wCAAsE;IACtE,iCAAwD;CAE3D;AAED;;GAEG;AACH;IACE;;OAEG;IACH,4BAFW,cAAc,EASxB;IAJC;;OAEG;IACH,gBAFU,cAAc,CAEY;CAEvC;AAED;;;;;GAKG;AACF;IACC;;;;;;;;;;OAUG;IACH,yBAVW,WAAW,iCAIX,MAAO,MAAM,EAwDvB;IA3CC;;;;OAIG;IACH,cAHU,WAAW,CAGA;IAErB;;;;OAIG;IACH,wBAAqC;IAErC;;;;OAIG;IACH,qBAA8C;IAE9C;;;OAGG;IACH,YAFU,OAAO,CAEkB;IAEnC;;;;OAIG;IACH,mBAAoB;IAKpB;;;;OAIG;IACH,gBAAmB;IAGrB;;;;OAIG;IACH,yBAHa,MAAM,CAKlB;IAED;;;;OAIG;IACH,+BAHa,MAAM,CAKlB;IAED;;;;;OAKG;IACH,iDAMC;IAED;;;;;OAKG;IACH,oDAOC;IAED;;;;;OAKG;IACH,8BAsBC;IAED;;;;;OAKG;IACH,2BAYC;IAED;;OAEG;IACH,cA2BC;IAID;;;;;;;;OAQG;IACH,WAPW,WAAW,qBAGX,OAAO,oBAkBjB;IAED;;OAEG;IACH,aAIC;CACF;AAED;IACE,iEAEC;CAIF;AAED;IACE,iEAEC;CAIF;AAED;IACE,iEAEC;CAIF;;cA/Za,MAAM;cACN,UAAU"}
\ No newline at end of file
diff --git a/types/codecs/codecs.d.ts b/types/codecs/codecs.d.ts
new file mode 100644
index 0000000..df42b8b
--- /dev/null
+++ b/types/codecs/codecs.d.ts
@@ -0,0 +1,97 @@
+/**
+ * This module helps interpret ffprobe -print_format json output.
+ * Its coverage is pretty sparse right now, so send me pull requests!
+ */
+/**
+ * @typedef ProbeStream ffprobe -show_streams -print_format json. Only the fields we care about.
+ * @property {number} index
+ * @property {string} codec_name
+ * @property {string} codec_long_name
+ * @property {string} profile
+ * @property {string} codec_type Either 'audio' or 'video'.
+ * @property {string} codec_tag_string
+ * @property {string} id
+ * @property {number?} level
+ * @property {number?} width
+ * @property {number?} height
+ * @property {string} r_frame_rate Like "60000/1001"
+ */
+/**
+ * @typedef ProbeFormat ffprobe -show_format -print_format json. Only the fields we care about.
+ * @property {string} filename
+ * @property {string} format_name
+ * @property {string} duration Number of seconds, as a string like "473.506367".
+ * @property {string} size Number of bytes, as a string.
+ * @property {string} bit_rate Bit rate, as a string.
+ */
+/**
+ * @typedef ProbeInfo ffprobe -show_format -show_streams -print_format json
+ * @property {ProbeStream[]} streams
+ * @property {ProbeFormat} format
+ */
+/**
+ * TODO: Reconcile this with file/sniffer.js findMimeType() which does signature matching.
+ * @param {ProbeInfo} info
+ * @returns {string}
+ */
+export function getShortMIMEString(info: ProbeInfo): string;
+/**
+ * Accepts the ffprobe JSON output and returns an ISO MIME string with parameters (RFC6381), such
+ * as 'video/mp4; codecs="avc1.4D4028, mp4a.40.2"'. This string should be suitable to be used on
+ * the server as the Content-Type header of a media stream which can subsequently be used on the
+ * client as the type value of a SourceBuffer object `mediaSource.addSourceBuffer(contentType)`.
+ * NOTE: For now, this method fails hard (throws an error) when it encounters a format/codec it
+ *     does not recognize. Please file a bug or send a PR.
+ * @param {ProbeInfo} info
+ * @returns {string}
+ */
+export function getFullMIMEString(info: ProbeInfo): string;
+/**
+ * ffprobe -show_streams -print_format json. Only the fields we care about.
+ */
+export type ProbeStream = {
+    index: number;
+    codec_name: string;
+    codec_long_name: string;
+    profile: string;
+    /**
+     * Either 'audio' or 'video'.
+     */
+    codec_type: string;
+    codec_tag_string: string;
+    id: string;
+    level: number | null;
+    width: number | null;
+    height: number | null;
+    /**
+     * Like "60000/1001"
+     */
+    r_frame_rate: string;
+};
+/**
+ * ffprobe -show_format -print_format json. Only the fields we care about.
+ */
+export type ProbeFormat = {
+    filename: string;
+    format_name: string;
+    /**
+     * Number of seconds, as a string like "473.506367".
+     */
+    duration: string;
+    /**
+     * Number of bytes, as a string.
+     */
+    size: string;
+    /**
+     * Bit rate, as a string.
+     */
+    bit_rate: string;
+};
+/**
+ * ffprobe -show_format -show_streams -print_format json
+ */
+export type ProbeInfo = {
+    streams: ProbeStream[];
+    format: ProbeFormat;
+};
+//# sourceMappingURL=codecs.d.ts.map
\ No newline at end of file
diff --git a/types/codecs/codecs.d.ts.map b/types/codecs/codecs.d.ts.map
new file mode 100644
index 0000000..3dc01dc
--- /dev/null
+++ b/types/codecs/codecs.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"codecs.d.ts","sourceRoot":"","sources":["../../codecs/codecs.js"],"names":[],"mappings":"AAQA;;;GAGG;AAEH;;;;;;;;;;;;;GAaG;AAEH;;;;;;;GAOG;AAEH;;;;GAIG;AAEH;;;;GAIG;AACH,yCAHW,SAAS,GACP,MAAM,CAuClB;AAED;;;;;;;;;GASG;AACH,wCAHW,SAAS,GACP,MAAM,CAyBlB;;;;;WAzGa,MAAM;gBACN,MAAM;qBACN,MAAM;aACN,MAAM;;;;gBACN,MAAM;sBACN,MAAM;QACN,MAAM;WACN,MAAM;WACN,MAAM;YACN,MAAM;;;;kBACN,MAAM;;;;;;cAKN,MAAM;iBACN,MAAM;;;;cACN,MAAM;;;;UACN,MAAM;;;;cACN,MAAM;;;;;;aAKN,WAAW,EAAE;YACb,WAAW"}
\ No newline at end of file
diff --git a/types/file/sniffer.d.ts b/types/file/sniffer.d.ts
new file mode 100644
index 0000000..76e10af
--- /dev/null
+++ b/types/file/sniffer.d.ts
@@ -0,0 +1,12 @@
+/**
+ * This function initializes the byte tree. It is lazily called upon findMimeType(), but if you care
+ * about when the tree initializes (like in startup, etc), you can call it yourself here.
+ */
+export function initialize(): void;
+/**
+ * Finds the likely MIME type represented by the ArrayBuffer.
+ * @param {ArrayBuffer} ab
+ * @returns {string} The MIME type of the buffer, or undefined.
+ */
+export function findMimeType(ab: ArrayBuffer): string;
+//# sourceMappingURL=sniffer.d.ts.map
\ No newline at end of file
diff --git a/types/file/sniffer.d.ts.map b/types/file/sniffer.d.ts.map
new file mode 100644
index 0000000..9b08e38
--- /dev/null
+++ b/types/file/sniffer.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"sniffer.d.ts","sourceRoot":"","sources":["../../file/sniffer.js"],"names":[],"mappings":"AA+DA;;;GAGG;AACH,mCAiCC;AAED;;;;GAIG;AACH,iCAHW,WAAW,GACT,MAAM,CAqBlB"}
\ No newline at end of file
diff --git a/types/image/webp-shim/webp-shim.d.ts b/types/image/webp-shim/webp-shim.d.ts
new file mode 100644
index 0000000..b6584f7
--- /dev/null
+++ b/types/image/webp-shim/webp-shim.d.ts
@@ -0,0 +1,11 @@
+/**
+ * @param {ArrayBuffer|Uint8Array} webpBuffer The byte array containing the WebP image bytes.
+ * @returns {Promise<ArrayBuffer>} A Promise resolving to a byte array containing the PNG bytes.
+ */
+export function convertWebPtoPNG(webpBuffer: ArrayBuffer | Uint8Array): Promise<ArrayBuffer>;
+/**
+ * @param {ArrayBuffer|Uint8Array} webpBuffer The byte array containing the WebP image bytes.
+ * @returns {Promise<ArrayBuffer>} A Promise resolving to a byte array containing the JPG bytes.
+ */
+export function convertWebPtoJPG(webpBuffer: ArrayBuffer | Uint8Array): Promise<ArrayBuffer>;
+//# sourceMappingURL=webp-shim.d.ts.map
\ No newline at end of file
diff --git a/types/image/webp-shim/webp-shim.d.ts.map b/types/image/webp-shim/webp-shim.d.ts.map
new file mode 100644
index 0000000..75b4874
--- /dev/null
+++ b/types/image/webp-shim/webp-shim.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"webp-shim.d.ts","sourceRoot":"","sources":["../../../image/webp-shim/webp-shim.js"],"names":[],"mappings":"AAgDA;;;GAGG;AACH,6CAHW,WAAW,GAAC,UAAU,GACpB,QAAQ,WAAW,CAAC,CAyBhC;AAED;;;GAGG;AACH,6CAHW,WAAW,GAAC,UAAU,GACpB,QAAQ,WAAW,CAAC,CAyBhC"}
\ No newline at end of file
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..e6853b8
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,11 @@
+export { findMimeType } from "./file/sniffer.js";
+export { BitStream } from "./io/bitstream.js";
+export { ByteBuffer } from "./io/bytebuffer.js";
+export { ByteStream } from "./io/bytestream.js";
+export type ProbeStream = import('./codecs/codecs.js').ProbeStream;
+export type ProbeFormat = import('./codecs/codecs.js').ProbeFormat;
+export type ProbeInfo = import('./codecs/codecs.js').ProbeInfo;
+export { UnarchiveEvent, UnarchiveEventType, UnarchiveInfoEvent, UnarchiveErrorEvent, UnarchiveStartEvent, UnarchiveFinishEvent, UnarchiveProgressEvent, UnarchiveExtractEvent, Unarchiver, Unzipper, Unrarrer, Untarrer, getUnarchiver } from "./archive/archive.js";
+export { getFullMIMEString, getShortMIMEString } from "./codecs/codecs.js";
+export { convertWebPtoPNG, convertWebPtoJPG } from "./image/webp-shim/webp-shim.js";
+//# sourceMappingURL=index.d.ts.map
\ No newline at end of file
diff --git a/types/index.d.ts.map b/types/index.d.ts.map
new file mode 100644
index 0000000..eec20b0
--- /dev/null
+++ b/types/index.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../index.js"],"names":[],"mappings":";;;;0BASa,OAAO,oBAAoB,EAAE,WAAW;0BAGxC,OAAO,oBAAoB,EAAE,WAAW;wBAGxC,OAAO,oBAAoB,EAAE,SAAS"}
\ No newline at end of file
diff --git a/types/io/bitstream.d.ts b/types/io/bitstream.d.ts
new file mode 100644
index 0000000..79fc223
--- /dev/null
+++ b/types/io/bitstream.d.ts
@@ -0,0 +1,87 @@
+export const BitStream: {
+    new (ab: ArrayBuffer, mtl: boolean, opt_offset: number, opt_length: number): {
+        /**
+         * The bytes in the stream.
+         * @type {Uint8Array}
+         * @private
+         */
+        bytes: Uint8Array;
+        /**
+         * The byte in the stream that we are currently on.
+         * @type {Number}
+         * @private
+         */
+        bytePtr: number;
+        /**
+         * The bit in the current byte that we will read next (can have values 0 through 7).
+         * @type {Number}
+         * @private
+         */
+        bitPtr: number;
+        /**
+         * An ever-increasing number.
+         * @type {Number}
+         * @private
+         */
+        bitsRead_: number;
+        peekBits: (n: number, opt_movePointers: any) => number;
+        /**
+         * Returns how many bites have been read in the stream since the beginning of time.
+         */
+        getNumBitsRead(): number;
+        /**
+         * Returns how many bits are currently in the stream left to be read.
+         */
+        getNumBitsLeft(): number;
+        /**
+         *   byte0      byte1      byte2      byte3
+         * 7......0 | 7......0 | 7......0 | 7......0
+         *
+         * The bit pointer starts at least-significant bit (0) of byte0 and moves left until it reaches
+         * bit7 of byte0, then jumps to bit0 of byte1, etc.
+         * @param {number} n The number of bits to peek, must be a positive integer.
+         * @param {boolean=} movePointers Whether to move the pointer, defaults false.
+         * @returns {number} The peeked bits, as an unsigned number.
+         */
+        peekBits_ltm(n: number, opt_movePointers: any): number;
+        /**
+         *   byte0      byte1      byte2      byte3
+         * 7......0 | 7......0 | 7......0 | 7......0
+         *
+         * The bit pointer starts at bit7 of byte0 and moves right until it reaches
+         * bit0 of byte0, then goes to bit7 of byte1, etc.
+         * @param {number} n The number of bits to peek.  Must be a positive integer.
+         * @param {boolean=} movePointers Whether to move the pointer, defaults false.
+         * @returns {number} The peeked bits, as an unsigned number.
+         */
+        peekBits_mtl(n: number, opt_movePointers: any): number;
+        /**
+         * Peek at 16 bits from current position in the buffer.
+         * Bit at (bytePtr,bitPtr) has the highest position in returning data.
+         * Taken from getbits.hpp in unrar.
+         * TODO: Move this out of BitStream and into unrar.
+         */
+        getBits(): number;
+        /**
+         * Reads n bits out of the stream, consuming them (moving the bit pointer).
+         * @param {number} n The number of bits to read.  Must be a positive integer.
+         * @returns {number} The read bits, as an unsigned number.
+         */
+        readBits(n: number): number;
+        /**
+         * This returns n bytes as a sub-array, advancing the pointer if movePointers
+         * is true.  Only use this for uncompressed blocks as this throws away remaining
+         * bits in the current byte.
+         * @param {number} n The number of bytes to peek.  Must be a positive integer.
+         * @param {boolean=} movePointers Whether to move the pointer, defaults false.
+         * @returns {Uint8Array} The subarray.
+         */
+        peekBytes(n: number, opt_movePointers: any): Uint8Array;
+        /**
+         * @param {number} n The number of bytes to read.
+         * @returns {Uint8Array} The subarray.
+         */
+        readBytes(n: number): Uint8Array;
+    };
+};
+//# sourceMappingURL=bitstream.d.ts.map
\ No newline at end of file
diff --git a/types/io/bitstream.d.ts.map b/types/io/bitstream.d.ts.map
new file mode 100644
index 0000000..b81ff4a
--- /dev/null
+++ b/types/io/bitstream.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"bitstream.d.ts","sourceRoot":"","sources":["../../io/bitstream.js"],"names":[],"mappings":"AACA;aAwBe,WAAW,OACX,OAAO;QAchB;;;;WAIG;eAFO,UAAU;QAKpB;;;;WAIG;;QAGH;;;;WAIG;;QAGH;;;;WAIG;;sBAqFM,MAAM,4BAEJ,MAAM;QAjFnB;;WAEG;;QAKH;;WAEG;;QAMH;;;;;;;;;WASG;wBAHQ,MAAM,0BAEJ,MAAM;QAkDnB;;;;;;;;;WASG;wBAHQ,MAAM,0BAEJ,MAAM;QAgDnB;;;;;WAKG;;QAOH;;;;WAIG;oBAFQ,MAAM,GACJ,MAAM;QAMnB;;;;;;;WAOG;qBAHQ,MAAM,0BAEJ,UAAU;QAmDvB;;;WAGG;qBAFQ,MAAM,GACJ,UAAU;;EAQtB"}
\ No newline at end of file
diff --git a/types/io/bytebuffer.d.ts b/types/io/bytebuffer.d.ts
new file mode 100644
index 0000000..d815dd0
--- /dev/null
+++ b/types/io/bytebuffer.d.ts
@@ -0,0 +1,41 @@
+export const ByteBuffer: {
+    new (numBytes: number): {
+        /**
+         * @type {Uint8Array}
+         * @public
+         */
+        data: Uint8Array;
+        /**
+         * @type {number}
+         * @public
+         */
+        ptr: number;
+        /**
+         * @param {number} b The byte to insert.
+         */
+        insertByte(b: number): void;
+        /**
+         * @param {Array.<number>|Uint8Array|Int8Array} bytes The bytes to insert.
+         */
+        insertBytes(bytes: Array<number> | Uint8Array | Int8Array): void;
+        /**
+         * Writes an unsigned number into the next n bytes.  If the number is too large
+         * to fit into n bytes or is negative, an error is thrown.
+         * @param {number} num The unsigned number to write.
+         * @param {number} numBytes The number of bytes to write the number into.
+         */
+        writeNumber(num: number, numBytes: number): void;
+        /**
+         * Writes a signed number into the next n bytes.  If the number is too large
+         * to fit into n bytes, an error is thrown.
+         * @param {number} num The signed number to write.
+         * @param {number} numBytes The number of bytes to write the number into.
+         */
+        writeSignedNumber(num: number, numBytes: number): void;
+        /**
+         * @param {string} str The ASCII string to write.
+         */
+        writeASCIIString(str: string): void;
+    };
+};
+//# sourceMappingURL=bytebuffer.d.ts.map
\ No newline at end of file
diff --git a/types/io/bytebuffer.d.ts.map b/types/io/bytebuffer.d.ts.map
new file mode 100644
index 0000000..c6efdaa
--- /dev/null
+++ b/types/io/bytebuffer.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"bytebuffer.d.ts","sourceRoot":"","sources":["../../io/bytebuffer.js"],"names":[],"mappings":"AACA;mBAkBe,MAAM;QAOf;;;WAGG;cAFO,UAAU;QAKpB;;;WAGG;aAFO,MAAM;QAOlB;;WAEG;sBADQ,MAAM;QAOjB;;WAEG;2BADQ,MAAO,MAAM,CAAC,GAAC,UAAU,GAAC,SAAS;QAQ9C;;;;;WAKG;yBAFQ,MAAM,YACN,MAAM;QAyBjB;;;;;WAKG;+BAFQ,MAAM,YACN,MAAM;QAuBjB;;WAEG;8BADQ,MAAM;;EAchB"}
\ No newline at end of file
diff --git a/types/io/bytestream.d.ts b/types/io/bytestream.d.ts
new file mode 100644
index 0000000..64fb5d8
--- /dev/null
+++ b/types/io/bytestream.d.ts
@@ -0,0 +1,109 @@
+export const ByteStream: {
+    new (ab: ArrayBuffer, opt_offset?: number | undefined, opt_length?: number | undefined): {
+        /**
+         * The current page of bytes in the stream.
+         * @type {Uint8Array}
+         * @private
+         */
+        bytes: Uint8Array;
+        /**
+         * The next pages of bytes in the stream.
+         * @type {Array<Uint8Array>}
+         * @private
+         */
+        pages_: Array<Uint8Array>;
+        /**
+         * The byte in the current page that we will read next.
+         * @type {Number}
+         * @private
+         */
+        ptr: number;
+        /**
+         * An ever-increasing number.
+         * @type {Number}
+         * @private
+         */
+        bytesRead_: number;
+        /**
+         * Returns how many bytes have been read in the stream since the beginning of time.
+         */
+        getNumBytesRead(): number;
+        /**
+         * Returns how many bytes are currently in the stream left to be read.
+         */
+        getNumBytesLeft(): number;
+        /**
+         * Move the pointer ahead n bytes.  If the pointer is at the end of the current array
+         * of bytes and we have another page of bytes, point at the new page.  This is a private
+         * method, no validation is done.
+         * @param {number} n Number of bytes to increment.
+         * @private
+         */
+        movePointer_(n: number): void;
+        /**
+         * Peeks at the next n bytes as an unsigned number but does not advance the
+         * pointer.
+         * @param {number} n The number of bytes to peek at.  Must be a positive integer.
+         * @returns {number} The n bytes interpreted as an unsigned number.
+         */
+        peekNumber(n: number): number;
+        /**
+         * Returns the next n bytes as an unsigned number (or -1 on error)
+         * and advances the stream pointer n bytes.
+         * @param {number} n The number of bytes to read.  Must be a positive integer.
+         * @returns {number} The n bytes interpreted as an unsigned number.
+         */
+        readNumber(n: number): number;
+        /**
+         * Returns the next n bytes as a signed number but does not advance the
+         * pointer.
+         * @param {number} n The number of bytes to read.  Must be a positive integer.
+         * @returns {number} The bytes interpreted as a signed number.
+         */
+        peekSignedNumber(n: number): number;
+        /**
+         * Returns the next n bytes as a signed number and advances the stream pointer.
+         * @param {number} n The number of bytes to read.  Must be a positive integer.
+         * @returns {number} The bytes interpreted as a signed number.
+         */
+        readSignedNumber(n: number): number;
+        /**
+         * This returns n bytes as a sub-array, advancing the pointer if movePointers
+         * is true.
+         * @param {number} n The number of bytes to read.  Must be a positive integer.
+         * @param {boolean} movePointers Whether to move the pointers.
+         * @returns {Uint8Array} The subarray.
+         */
+        peekBytes(n: number, movePointers: boolean): Uint8Array;
+        /**
+         * Reads the next n bytes as a sub-array.
+         * @param {number} n The number of bytes to read.  Must be a positive integer.
+         * @returns {Uint8Array} The subarray.
+         */
+        readBytes(n: number): Uint8Array;
+        /**
+         * Peeks at the next n bytes as an ASCII string but does not advance the pointer.
+         * @param {number} n The number of bytes to peek at.  Must be a positive integer.
+         * @returns {string} The next n bytes as a string.
+         */
+        peekString(n: number): string;
+        /**
+         * Returns the next n bytes as an ASCII string and advances the stream pointer
+         * n bytes.
+         * @param {number} n The number of bytes to read.  Must be a positive integer.
+         * @returns {string} The next n bytes as a string.
+         */
+        readString(n: number): string;
+        /**
+         * Feeds more bytes into the back of the stream.
+         * @param {ArrayBuffer} ab
+         */
+        push(ab: ArrayBuffer): void;
+        /**
+         * Creates a new ByteStream from this ByteStream that can be read / peeked.
+         * @returns {ByteStream} A clone of this ByteStream.
+         */
+        tee(): any;
+    };
+};
+//# sourceMappingURL=bytestream.d.ts.map
\ No newline at end of file
diff --git a/types/io/bytestream.d.ts.map b/types/io/bytestream.d.ts.map
new file mode 100644
index 0000000..b9b05f5
--- /dev/null
+++ b/types/io/bytestream.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"bytestream.d.ts","sourceRoot":"","sources":["../../io/bytestream.js"],"names":[],"mappings":"AACA;aAoBe,WAAW,eACX,MAAM,2BACN,MAAM;QAUf;;;;WAIG;eAFO,UAAU;QAKpB;;;;WAIG;gBAFO,MAAM,UAAU,CAAC;QAK3B;;;;WAIG;;QAGH;;;;WAIG;;QAIL;;WAEG;;QAKH;;WAEG;;QAMH;;;;;;WAMG;wBAFQ,MAAM;QAYjB;;;;;WAKG;sBAFQ,MAAM,GACJ,MAAM;QAqCnB;;;;;WAKG;sBAFQ,MAAM,GACJ,MAAM;QASnB;;;;;WAKG;4BAFQ,MAAM,GACJ,MAAM;QAanB;;;;WAIG;4BAFQ,MAAM,GACJ,MAAM;QASnB;;;;;;WAMG;qBAHQ,MAAM,gBACN,OAAO,GACL,UAAU;QA2CvB;;;;WAIG;qBAFQ,MAAM,GACJ,UAAU;QAMvB;;;;WAIG;sBAFQ,MAAM,GACJ,MAAM;QA+BnB;;;;;WAKG;sBAFQ,MAAM,GACJ,MAAM;QAQnB;;;WAGG;iBADQ,WAAW;QAatB;;;WAGG;;;EAYF"}
\ No newline at end of file