diff --git a/gui/src/api/client.ts b/gui/src/api/client.ts
index 4584baa2..b14be99d 100644
--- a/gui/src/api/client.ts
+++ b/gui/src/api/client.ts
@@ -1,4 +1,4 @@
-import { doesExist, NotImplementedError } from '@apextoaster/js-utils';
+import { doesExist } from '@apextoaster/js-utils';
 
 import { ConfigParams } from '../config.js';
 
@@ -43,13 +43,11 @@ export type Txt2ImgResponse = Required<Txt2ImgParams>;
 export interface InpaintParams extends BaseImgParams {
   mask: Blob;
   source: Blob;
-}
 
-export interface OutpaintParams extends Img2ImgParams {
-  up: boolean;
-  down: boolean;
-  left: boolean;
-  right: boolean;
+  left?: number;
+  right?: number;
+  top?: number;
+  bottom?: number;
 }
 
 export interface ApiResponse {
@@ -72,9 +70,7 @@ export interface ApiClient {
 
   img2img(params: Img2ImgParams): Promise<ApiResponse>;
   txt2img(params: Txt2ImgParams): Promise<ApiResponse>;
-
   inpaint(params: InpaintParams): Promise<ApiResponse>;
-  outpaint(params: OutpaintParams): Promise<ApiResponse>;
 
   ready(params: ApiResponse): Promise<ApiReady>;
 }
@@ -214,6 +210,23 @@ export function makeClient(root: string, f = fetch): ApiClient {
 
       const url = makeImageURL(root, 'inpaint', params);
 
+      if (doesExist(params.left)) {
+        url.searchParams.append('left', params.left.toFixed(0));
+      }
+
+
+      if (doesExist(params.right)) {
+        url.searchParams.append('right', params.right.toFixed(0));
+      }
+
+      if (doesExist(params.top)) {
+        url.searchParams.append('top', params.top.toFixed(0));
+      }
+
+      if (doesExist(params.bottom)) {
+        url.searchParams.append('bottom', params.bottom.toFixed(0));
+      }
+
       const body = new FormData();
       body.append('mask', params.mask, 'mask');
       body.append('source', params.source, 'source');
@@ -226,9 +239,6 @@ export function makeClient(root: string, f = fetch): ApiClient {
       // eslint-disable-next-line no-return-await
       return await pending;
     },
-    async outpaint() {
-      throw new NotImplementedError();
-    },
     async ready(params: ApiResponse): Promise<ApiReady> {
       const path = makeApiUrl(root, 'ready');
       path.searchParams.append('output', params.output.key);
@@ -240,7 +250,7 @@ export function makeClient(root: string, f = fetch): ApiClient {
 }
 
 export async function parseApiResponse(root: string, res: Response): Promise<ApiResponse> {
-  type LimitedResponse = Omit<ApiResponse, 'output'> & {output: string};
+  type LimitedResponse = Omit<ApiResponse, 'output'> & { output: string };
 
   if (res.status === STATUS_SUCCESS) {
     const data = await res.json() as LimitedResponse;
diff --git a/gui/src/components/Inpaint.tsx b/gui/src/components/Inpaint.tsx
index f84d4f55..f441937d 100644
--- a/gui/src/components/Inpaint.tsx
+++ b/gui/src/components/Inpaint.tsx
@@ -9,6 +9,7 @@ import { ClientContext, StateContext } from '../state.js';
 import { ImageControl } from './ImageControl.js';
 import { ImageInput } from './ImageInput.js';
 import { MaskCanvas } from './MaskCanvas.js';
+import { OutpaintControl } from './OutpaintControl.js';
 
 const { useContext } = React;
 
@@ -88,6 +89,7 @@ export function Inpaint(props: InpaintProps) {
           setInpaint(newParams);
         }}
       />
+      <OutpaintControl config={config} />
       <Button onClick={() => upload.mutate()}>Generate</Button>
     </Stack>
   </Box>;
diff --git a/gui/src/components/OutpaintControl.tsx b/gui/src/components/OutpaintControl.tsx
new file mode 100644
index 00000000..d620936c
--- /dev/null
+++ b/gui/src/components/OutpaintControl.tsx
@@ -0,0 +1,73 @@
+import { mustExist } from '@apextoaster/js-utils';
+import { Stack } from '@mui/material';
+import * as React from 'react';
+import { useContext } from 'react';
+import { useStore } from 'zustand';
+
+import { ConfigParams } from '../config.js';
+import { StateContext } from '../state.js';
+import { NumericField } from './NumericField.js';
+
+export interface OutpaintControlProps {
+  config: ConfigParams;
+}
+
+export function OutpaintControl(props: OutpaintControlProps) {
+  const { config } = props;
+
+  const state = mustExist(useContext(StateContext));
+  const params = useStore(state, (s) => s.inpaint);
+  // eslint-disable-next-line @typescript-eslint/unbound-method
+  const setInpaint = useStore(state, (s) => s.setInpaint);
+
+  return <Stack direction='row' spacing={4}>
+    <NumericField
+      label='Left'
+      min={0}
+      max={config.width.max}
+      step={config.width.step}
+      value={params.left}
+      onChange={(left) => {
+        setInpaint({
+          left,
+        });
+      }}
+    />
+    <NumericField
+      label='Right'
+      min={0}
+      max={config.width.max}
+      step={config.width.step}
+      value={params.right}
+      onChange={(right) => {
+        setInpaint({
+          right,
+        });
+      }}
+    />
+    <NumericField
+      label='Top'
+      min={0}
+      max={config.height.max}
+      step={config.height.step}
+      value={params.top}
+      onChange={(top) => {
+        setInpaint({
+          top,
+        });
+      }}
+    />
+    <NumericField
+      label='Bottom'
+      min={0}
+      max={config.height.max}
+      step={config.height.step}
+      value={params.bottom}
+      onChange={(bottom) => {
+        setInpaint({
+          bottom,
+        });
+      }}
+    />
+  </Stack>;
+}
diff --git a/gui/src/state.ts b/gui/src/state.ts
index 22e2bed6..89887090 100644
--- a/gui/src/state.ts
+++ b/gui/src/state.ts
@@ -114,6 +114,10 @@ export function createStateSlices(base: ConfigParams) {
       ...defaults,
       mask: null,
       source: null,
+      left: 0,
+      right: 0,
+      top: 0,
+      bottom: 0,
     },
     setInpaint(params) {
       set((prev) => ({
@@ -129,6 +133,10 @@ export function createStateSlices(base: ConfigParams) {
           ...defaults,
           mask: null,
           source: null,
+          left: 0,
+          right: 0,
+          top: 0,
+          bottom: 0,
         },
       });
     },