diff --git a/js/components/Debugger.tsx b/js/components/Debugger.tsx
index 2fbaca4..6c8790d 100644
--- a/js/components/Debugger.tsx
+++ b/js/components/Debugger.tsx
@@ -1,10 +1,15 @@
 import { h, JSX } from 'preact';
+import cs from 'classnames';
 import { useCallback, useEffect, useRef, useState } from 'preact/hooks';
 import { Apple2 as Apple2Impl } from '../apple2';
+import { ControlButton } from './ControlButton';
+import { FileChooser } from './FileChooser';
 import { Inset } from './Inset';
+import { loadLocalBinaryFile } from './util/files';
 
 import styles from './css/Debugger.module.css';
-import { ControlButton } from './ControlButton';
+import { spawn } from './util/promises';
+import { toHex } from 'js/util';
 
 export interface DebuggerProps {
     apple2: Apple2Impl | undefined;
@@ -20,10 +25,25 @@ interface DebugData {
     zeroPage: string;
 }
 
+const CIDERPRESS_EXTENSION = /#([0-9a-f]{2})([0-9a-f]{4})$/i;
+const VALID_PAGE = /^[0-9A-F]{1,2}$/i;
+const VALID_ADDRESS = /^[0-9A-F]{1,4}$/i;
+
+const ERROR_ICON = (
+    <div className={styles.invalid}>
+        <i
+            className="fa-solid fa-triangle-exclamation"
+            title="Invalid hex address"
+        />
+    </div>
+);
+
 export const Debugger = ({ apple2 }: DebuggerProps) => {
     const debug = apple2?.getDebugger();
     const [data, setData] = useState<DebugData>();
     const [memoryPage, setMemoryPage] = useState('08');
+    const [loadAddress, setLoadAddress] = useState('0800');
+    const [run, setRun] = useState(true);
     const animationRef = useRef<number>(0);
 
     const animate = useCallback(() => {
@@ -57,10 +77,38 @@ export const Debugger = ({ apple2 }: DebuggerProps) => {
         debug?.step();
     }, [debug]);
 
-    const doMemoryPage = useCallback((event: JSX.TargetedMouseEvent<HTMLInputElement>) => {
+    const doLoadAddress = useCallback((event: JSX.TargetedEvent<HTMLInputElement>) => {
+        setLoadAddress(event.currentTarget.value);
+    }, []);
+    const doRunCheck = useCallback((event: JSX.TargetedEvent<HTMLInputElement>) => {
+        setRun(event.currentTarget.checked);
+    }, []);
+
+    const doMemoryPage = useCallback((event: JSX.TargetedEvent<HTMLInputElement>) => {
         setMemoryPage(event.currentTarget.value);
     }, []);
 
+    const doChooseFile = useCallback((handles: FileSystemFileHandle[]) => {
+        if (debug && handles.length === 1) {
+            spawn(async () => {
+                const file = await handles[0].getFile();
+                let atAddress = parseInt(loadAddress, 16) || 0x800;
+
+                const matches = file.name.match(CIDERPRESS_EXTENSION);
+                if (matches && matches.length === 3) {
+                    const [, , aux] = matches;
+                    atAddress = parseInt(aux, 16);
+                }
+
+                await loadLocalBinaryFile(file, atAddress, debug);
+                setLoadAddress(toHex(atAddress, 4));
+                if (run) {
+                    debug?.runAt(atAddress);
+                }
+            });
+        }
+    }, [debug, loadAddress, run]);
+
     if (!data) {
         return null;
     }
@@ -74,9 +122,12 @@ export const Debugger = ({ apple2 }: DebuggerProps) => {
         zeroPage
     } = data;
 
+    const memoryPageValid = VALID_PAGE.test(memoryPage);
+    const loadAddressValid = VALID_ADDRESS.test(loadAddress);
+
     return (
         <Inset className={styles.inset}>
-            <div className={styles.debugger}>
+            <div className={cs(styles.debugger, styles.column)}>
                 <div className={styles.heading}>Debugger</div>
                 <span className={styles.subHeading}>Controls</span>
                 <div className={styles.controls}>
@@ -125,18 +176,36 @@ export const Debugger = ({ apple2 }: DebuggerProps) => {
                     </div>
                 </div>
                 <div>
-                    <span className={styles.subHeading}>Memory Page: $</span>
+                    <hr />
+                    <span className={styles.subHeading}>Memory Page: $ </span>
                     <input
-                        min={0x00}
-                        max={0xff}
                         value={memoryPage}
                         onChange={doMemoryPage}
                         maxLength={2}
+                        className={cs({ [styles.invalid]: !memoryPageValid })}
                     />
+                    {memoryPageValid ? null : ERROR_ICON}
                     <pre className={styles.zp}>
                         {memory}
                     </pre>
                 </div>
+                <div>
+                    <hr />
+                    <span className={styles.subHeading}>Load File: $ </span>
+                    <input
+                        type="text"
+                        value={loadAddress}
+                        maxLength={4}
+                        onChange={doLoadAddress}
+                        className={cs({ [styles.invalid]: !loadAddressValid })}
+                    />
+                    {loadAddressValid ? null : ERROR_ICON}
+                    {' '}
+                    <input type="checkbox" checked={run} onChange={doRunCheck} />Run
+                    <div className={styles.fileChooser}>
+                        <FileChooser onChange={doChooseFile} />
+                    </div>
+                </div>
             </div>
         </Inset>
     );
diff --git a/js/components/css/App.module.css b/js/components/css/App.module.css
index 957b13a..ac7c77d 100644
--- a/js/components/css/App.module.css
+++ b/js/components/css/App.module.css
@@ -49,3 +49,29 @@ input[type="file"]::file-selector-button {
     display: flex;
     flex-direction: column;
 }
+
+input[type="checkbox"] {
+    appearance: none;
+    background-color: #65594d;
+    border: 1px inset #65594d;
+    padding: 7px;
+    top: 7px;
+    border-radius: 3px;
+    display: inline-block;
+    position: relative;
+}
+
+input[type="checkbox"]:checked {
+    background-color: #65594d;
+    border: 1px inset #65594d;
+    color: #0d0;
+}
+
+input[type="checkbox"]:checked::after {
+    content: "\2716";
+    font-size: 12px;
+    position: absolute;
+    top: 0;
+    left: 2px;
+    color: #0d0;
+}
diff --git a/js/components/css/Debugger.module.css b/js/components/css/Debugger.module.css
index 7cc849e..1f66a56 100644
--- a/js/components/css/Debugger.module.css
+++ b/js/components/css/Debugger.module.css
@@ -7,19 +7,31 @@
     border: 1px inset;
 }
 
-.debugger input {
-    border: 1px inset;
+.debugger {
     font-size: 12px;
 }
 
+.debugger button,
+.debugger input {
+    font-size: 12px;
+}
+
+.debugger input[type="text"] {
+    border: 1px inset;
+}
+
+.debugger hr {
+    color: #c4c1a0;
+}
+
 .inset {
-    margin: 5px 10px;
+    margin: 5px 10px 0;
     width: auto;
 }
 
 .heading {
     font-weight: bold;
-    font-size: 16px;
+    font-size: 18px;
     margin-bottom: 10px;
 }
 
@@ -54,3 +66,22 @@
 .stack {
     width: 10em;
 }
+
+.fileChooser {
+    padding: 5px 0;
+}
+
+.invalid {
+    color: #f00;
+}
+
+div.invalid {
+    position: relative;
+    display: inline-block;
+}
+
+div.invalid i {
+    position: absolute;
+    top: -9px;
+    left: -16px;
+}
diff --git a/js/components/util/files.ts b/js/components/util/files.ts
index 3a3dbd3..f02d7bd 100644
--- a/js/components/util/files.ts
+++ b/js/components/util/files.ts
@@ -1,4 +1,4 @@
-import { includes } from 'js/types';
+import { includes, word } from 'js/types';
 import { initGamepad } from 'js/ui/gamepad';
 import {
     BlockFormat,
@@ -12,6 +12,7 @@ import {
 } from 'js/formats/types';
 import Disk2 from 'js/cards/disk2';
 import SmartPort from 'js/cards/smartport';
+import Debugger from 'js/debugger';
 
 type ProgressCallback = (current: number, total: number) => void;
 
@@ -255,3 +256,24 @@ export class SmartStorageBroker implements MassStorage<unknown> {
         return null;
     }
 }
+
+/**
+ * Load binary file into memory.
+ *
+ * @param file File object to read into memory
+ * @param address Address at which to start load
+ * @param debug Debugger object
+ * @returns resolves to true if successful
+ */
+export const loadLocalBinaryFile = (file: File, address: word, debug: Debugger) => {
+    return new Promise((resolve, _reject) => {
+        const fileReader = new FileReader();
+        fileReader.onload = function () {
+            const result = this.result as ArrayBuffer;
+            const bytes = new Uint8Array(result);
+            debug.setMemory(address, bytes);
+            resolve(true);
+        };
+        fileReader.readAsArrayBuffer(file);
+    });
+};
diff --git a/js/debugger.ts b/js/debugger.ts
index eff60ad..e8a0926 100644
--- a/js/debugger.ts
+++ b/js/debugger.ts
@@ -72,6 +72,17 @@ export default class Debugger {
         this.container.run();
     };
 
+    /**
+     * Restart at a given memory address.
+     *
+     * @param address Address to start execution
+     */
+
+    runAt = (address: word) => {
+        this.cpu.reset();
+        this.cpu.setPC(address);
+    };
+
     isRunning = () =>
         this.container.isRunning();
 
@@ -212,6 +223,35 @@ export default class Debugger {
         return result;
     };
 
+    /**
+     * Reads a range of memory. Will wrap at memory limit.
+     *
+     * @param address Starting address to read memory
+     * @param length Length of memory to read.
+     * @returns Byte array containing memory
+     */
+    getMemory(address: word, length: word) {
+        const bytes = new Uint8Array(length);
+        for (let idx = 0; idx < length; idx++) {
+            address &= 0xffff;
+            bytes[idx] = this.cpu.read(address++);
+        }
+        return bytes;
+    }
+
+    /**
+     * Writes a range of memory. Will wrap at memory limit.
+     *
+     * @param address Starting address to write memory
+     * @param bytes Data to write
+     */
+    setMemory(address: word, bytes: Uint8Array) {
+        for (const byte of bytes) {
+            address &= 0xffff;
+            this.cpu.write(address++, byte);
+        }
+    }
+
     list = (pc: word) => {
         const results = [];
         for (let idx = 0; idx < 20; idx++) {