diff --git a/addons/addon-canvas/src/Types.d.ts b/addons/addon-canvas/src/Types.ts
similarity index 100%
rename from addons/addon-canvas/src/Types.d.ts
rename to addons/addon-canvas/src/Types.ts
diff --git a/addons/addon-image/src/Types.d.ts b/addons/addon-image/src/Types.ts
similarity index 100%
rename from addons/addon-image/src/Types.d.ts
rename to addons/addon-image/src/Types.ts
diff --git a/addons/addon-image/test/ImageAddon.test.ts b/addons/addon-image/test/ImageAddon.test.ts
index 64d4fa22..c6f16d8c 100644
--- a/addons/addon-image/test/ImageAddon.test.ts
+++ b/addons/addon-image/test/ImageAddon.test.ts
@@ -7,9 +7,24 @@ import test from '@playwright/test';
 import { readFileSync } from 'fs';
 import { FINALIZER, introducer, sixelEncode } from 'sixel';
 import { ITestContext, createTestContext, openTerminal, pollFor } from '../../../out-test/playwright/TestUtils';
-import { IImageAddonOptions } from '../src/Types';
 import { deepStrictEqual, ok, strictEqual } from 'assert';
 
+/**
+ * Plugin ctor options.
+ */
+export interface IImageAddonOptions {
+  enableSizeReports: boolean;
+  pixelLimit: number;
+  storageLimit: number;
+  showPlaceholder: boolean;
+  sixelSupport: boolean;
+  sixelScrolling: boolean;
+  sixelPaletteLimit: number;
+  sixelSizeLimit: number;
+  iipSupport: boolean;
+  iipSizeLimit: number;
+}
+
 // eslint-disable-next-line
 declare const ImageAddon: {
   new(options?: Partial<IImageAddonOptions>): any;
diff --git a/addons/addon-ligatures/src/Types.d.ts b/addons/addon-ligatures/src/Types.ts
similarity index 100%
rename from addons/addon-ligatures/src/Types.d.ts
rename to addons/addon-ligatures/src/Types.ts
diff --git a/addons/addon-webgl/src/Types.d.ts b/addons/addon-webgl/src/Types.ts
similarity index 100%
rename from addons/addon-webgl/src/Types.d.ts
rename to addons/addon-webgl/src/Types.ts
diff --git a/src/browser/Types.d.ts b/src/browser/Types.ts
similarity index 97%
rename from src/browser/Types.d.ts
rename to src/browser/Types.ts
index 9ebc55d9..24f008a1 100644
--- a/src/browser/Types.d.ts
+++ b/src/browser/Types.ts
@@ -129,7 +129,7 @@ export interface ILinkifier2 extends IDisposable {
   readonly currentLink: ILinkWithState | undefined;
 }
 
-interface ILink {
+export interface ILink {
   range: IBufferRange;
   text: string;
   decorations?: ILinkDecorations;
@@ -139,17 +139,17 @@ interface ILink {
   dispose?(): void;
 }
 
-interface ILinkDecorations {
+export interface ILinkDecorations {
   pointerCursor: boolean;
   underline: boolean;
 }
 
-interface IBufferRange {
+export interface IBufferRange {
   start: IBufferCellPosition;
   end: IBufferCellPosition;
 }
 
-interface IBufferCellPosition {
+export interface IBufferCellPosition {
   x: number;
   y: number;
 }
diff --git a/src/browser/renderer/shared/Types.d.ts b/src/browser/renderer/shared/Types.ts
similarity index 100%
rename from src/browser/renderer/shared/Types.d.ts
rename to src/browser/renderer/shared/Types.ts
diff --git a/src/browser/selection/Types.d.ts b/src/browser/selection/Types.ts
similarity index 100%
rename from src/browser/selection/Types.d.ts
rename to src/browser/selection/Types.ts
diff --git a/src/common/InputHandler.test.ts b/src/common/InputHandler.test.ts
index 0f17a3e6..baae735c 100644
--- a/src/common/InputHandler.test.ts
+++ b/src/common/InputHandler.test.ts
@@ -5,7 +5,7 @@
 
 import { assert } from 'chai';
 import { InputHandler } from 'common/InputHandler';
-import { IBufferLine, IAttributeData, IColorEvent, ColorIndex, ColorRequestType, SpecialColorIndex } from 'common/Types';
+import { IBufferLine, IAttributeData, IColorEvent, ColorRequestType, SpecialColorIndex } from 'common/Types';
 import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
 import { CellData } from 'common/buffer/CellData';
 import { Attributes, BgFlags, UnderlineStyle } from 'common/buffer/Constants';
diff --git a/src/common/InputHandler.ts b/src/common/InputHandler.ts
index 6db8751e..bef0eaa7 100644
--- a/src/common/InputHandler.ts
+++ b/src/common/InputHandler.ts
@@ -3456,6 +3456,6 @@ class DirtyRowTracker implements IDirtyRowTracker {
   }
 }
 
-function isValidColorIndex(value: number): value is ColorIndex {
+export function isValidColorIndex(value: number): value is ColorIndex {
   return 0 <= value && value < 256;
 }
diff --git a/src/common/Types.d.ts b/src/common/Types.ts
similarity index 99%
rename from src/common/Types.d.ts
rename to src/common/Types.ts
index 17c7231a..8b32067e 100644
--- a/src/common/Types.d.ts
+++ b/src/common/Types.ts
@@ -425,8 +425,8 @@ type Enumerate<N extends number, Acc extends number[] = []> = Acc['length'] exte
   : Enumerate<N, [...Acc, Acc['length']]>;
 type IntRange<F extends number, T extends number> = Exclude<Enumerate<T>, Enumerate<F>>;
 
-type ColorIndex = IntRange<0, 256>; // number from 0 to 255
-type AllColorIndex = ColorIndex | SpecialColorIndex;
+export type ColorIndex = IntRange<0, 256>; // number from 0 to 255
+export type AllColorIndex = ColorIndex | SpecialColorIndex;
 export const enum SpecialColorIndex {
   FOREGROUND = 256,
   BACKGROUND = 257,
diff --git a/src/common/buffer/Types.d.ts b/src/common/buffer/Types.ts
similarity index 100%
rename from src/common/buffer/Types.d.ts
rename to src/common/buffer/Types.ts
diff --git a/src/common/parser/Types.d.ts b/src/common/parser/Types.ts
similarity index 100%
rename from src/common/parser/Types.d.ts
rename to src/common/parser/Types.ts