diff --git a/ui/package-lock.json b/ui/package-lock.json
index 25d4050..2ee7479 100644
--- a/ui/package-lock.json
+++ b/ui/package-lock.json
@@ -19,7 +19,8 @@
     },
     "../pkg": {
       "name": "word_grid",
-      "version": "0.1.0"
+      "version": "0.1.0",
+      "license": "AGPL-3"
     },
     "node_modules/@babel/code-frame": {
       "version": "7.22.5",
diff --git a/ui/src/Modal.tsx b/ui/src/Modal.tsx
index 041a13e..d043788 100644
--- a/ui/src/Modal.tsx
+++ b/ui/src/Modal.tsx
@@ -2,7 +2,7 @@ import {useEffect, useRef} from "react";
 
 export function Modal(props: {
     isOpen: boolean;
-    setClosed: () => void;
+    setOpen: (isOpen: boolean) => void;
     children: any;
 }){
 
@@ -27,7 +27,7 @@ export function Modal(props: {
                     // we manually trigger a close anyway because the children can get updated before the dialog gets closed otherwise
                     // @ts-ignore
                     ref.current.close();
-                    props.setClosed();
+                    props.setOpen(false);
                 }}>✕</button>
             </div>
             <div>
diff --git a/ui/src/elements.tsx b/ui/src/elements.tsx
index e34672c..1db9dd2 100644
--- a/ui/src/elements.tsx
+++ b/ui/src/elements.tsx
@@ -1,6 +1,8 @@
 import * as React from "react";
 import {GameWasm, Letter as LetterData, MyResult, PlayedTile, PlayerAndScore, Tray, WordResult} from "word_grid";
 import {ChangeEvent, JSX, useEffect, useMemo, useReducer, useRef, useState} from "react";
+import {Modal} from "./Modal";
+import {addNTimes} from "./utils";
 
 export interface Settings {
     trayLength: number;
@@ -181,8 +183,6 @@ export function Game(props: {wasm: GameWasm, settings: Settings}) {
     }
 
     const [playerLetters, trayDispatch] = useReducer(movePlayableLetters, []);
-
-
     const [logInfo, logDispatch] = useReducer(addLogInfo, []);
 
     const [turnCount, setTurnCount] = useState<number>(1);
@@ -202,6 +202,7 @@ export function Game(props: {wasm: GameWasm, settings: Settings}) {
 
     const logDivRef = useRef(null);
 
+    const [isTileExchangeOpen, setIsTileExchangeOpen] = useState<boolean>(false);
 
     useEffect(() => {
         // Effect is to keep the log window scrolled down
@@ -214,6 +215,7 @@ export function Game(props: {wasm: GameWasm, settings: Settings}) {
 
 
     return <>
+        <TileExchangeModal playerLetters={playerLetters} isOpen={isTileExchangeOpen} setOpen={setIsTileExchangeOpen} />
         <div className="board-log">
             <Grid cellTypes={cellTypes} playerLetters={playerLetters} boardLetters={boardLetters} dispatch={trayDispatch}/>
             <div className="message-log">
@@ -273,6 +275,7 @@ export function Game(props: {wasm: GameWasm, settings: Settings}) {
 
 
         }}>{confirmedScorePoints > -1 ? `Score ${confirmedScorePoints} points ✅` : "Check"}</button>
+        <button onClick={(e) => {setIsTileExchangeOpen(true);}}>Open Tile Exchange</button>
     </>;
 
 
@@ -465,4 +468,115 @@ function Scores(props: {playerScores: Array<PlayerAndScore>}){
     return <div className="scoring">
         {elements}
     </div>
-}
\ No newline at end of file
+}
+
+function TileExchangeModal(props: {playerLetters: PlayableLetterData[], isOpen: boolean, setOpen: (isOpen: boolean) => void}) {
+
+    function clearExchangeTiles() {
+        const array: boolean[] = [];
+        addNTimes(array, false, props.playerLetters.length);
+        return array;
+    }
+
+    const [tilesToExchange, setTilesToExchange] = useState<boolean[]>(clearExchangeTiles);
+
+    let tilesExchangedSelected = 0;
+    for (let i of tilesToExchange) {
+        if(i) {
+            tilesExchangedSelected++;
+        }
+    }
+
+    return <Modal isOpen={props.isOpen} setOpen={(isOpen) => {
+        setTilesToExchange(clearExchangeTiles());
+        props.setOpen(isOpen);
+    }}>
+        <div className="tile-exchange-dialog">
+        <div className="instructions">
+            Click on each tile you'd like to exchange. You currently have {tilesExchangedSelected} tiles selected.
+        </div>
+        <div className="selection-buttons">
+            <button onClick={(e) => {
+                const array: boolean[] = [];
+                addNTimes(array, true, props.playerLetters.length);
+                setTilesToExchange(array);
+            }}>Select All</button>
+            <button onClick={(e) => {
+                setTilesToExchange(clearExchangeTiles());
+            }}>Select None</button>
+        </div>
+
+        <TilesExchangedTray
+            tray={props.playerLetters}
+            selectedArray={tilesToExchange}
+            setSelectedArray={setTilesToExchange}
+            trayLength={props.playerLetters.length}
+        />
+        <div className="finish-buttons">
+            <button onClick={() => {
+                setTilesToExchange(clearExchangeTiles());
+                props.setOpen(false);
+            }}>Cancel</button>
+            <button disabled = {tilesExchangedSelected == 0} onClick={(e) => {
+                // TODO exchange code
+
+            }}>Exchange</button>
+        </div>
+    </div>
+    </Modal>;
+
+}
+
+function TilesExchangedTray(props: {
+    tray: Array<PlayableLetterData>,
+    trayLength: number,
+    selectedArray: Array<boolean>,
+    setSelectedArray: (x: Array<boolean>) => void,
+}){
+
+    const divContent = [];
+    for(let i = 0; i<props.trayLength; i++){
+        const tileData = props.tray[i];
+
+        const toggleFunction = () => {
+            props.selectedArray[i] = !props.selectedArray[i];
+            props.setSelectedArray(props.selectedArray.slice());
+        }
+
+        if(tileData != null){
+            divContent.push(
+                <DummyExchangeTile key={i} letter={tileData} isSelected={props.selectedArray[i]} onClick={toggleFunction}/>
+            );
+        } else{
+            divContent.push(<span key={i} />);
+        }
+    }
+
+    return  <div className="tray">
+                {divContent}
+            </div>;
+
+}
+
+function DummyExchangeTile(props: {
+    letter: LetterData,
+    isSelected: boolean,
+    onClick: () => void,
+}){
+
+    let textClassName = "text";
+    if(props.letter.is_blank) {
+        textClassName += " prev-blank";
+    }
+
+    let letterClassName = "letter";
+    if(props.isSelected){
+        letterClassName += ' selected-tile';
+    }
+
+
+    return <div className={letterClassName} onClick={props.onClick}>
+        <div className={textClassName}>{props.letter.text}</div>
+        <div className="letter-points">{props.letter.points}</div>
+    </div>;
+}
diff --git a/ui/src/style.less b/ui/src/style.less
index a205905..b5d837f 100644
--- a/ui/src/style.less
+++ b/ui/src/style.less
@@ -188,4 +188,31 @@ dialog {
     }
   }
 
+  .tile-exchange-dialog {
+
+    .selection-buttons {
+      display: flex;
+      justify-content: space-around;
+
+      button {
+        width: 40%;
+      }
+    }
+
+    .finish-buttons {
+      .selection-buttons();
+    }
+
+    .tray-container {
+      display: flex;
+      justify-content: center;
+      margin: 20px;
+    }
+
+    .selected-tile {
+      bottom: 10px;
+    }
+
+  }
+
 }
\ No newline at end of file
diff --git a/ui/src/utils.ts b/ui/src/utils.ts
new file mode 100644
index 0000000..bc070f3
--- /dev/null
+++ b/ui/src/utils.ts
@@ -0,0 +1,6 @@
+
+export function addNTimes<T>(array: T[], toAdd: T, times: number) {
+    for (let i=0; i<times; i++) {
+        array.push(toAdd);
+    }
+}
\ No newline at end of file