diff --git a/gui/src/components/ImageControl.tsx b/gui/src/components/ImageControl.tsx
index 8a8ac64f..3f86720d 100644
--- a/gui/src/components/ImageControl.tsx
+++ b/gui/src/components/ImageControl.tsx
@@ -1,10 +1,11 @@
 import { doesExist } from '@apextoaster/js-utils';
-import { IconButton, Stack, TextField } from '@mui/material';
 import { Casino } from '@mui/icons-material';
+import { IconButton, Stack, TextField } from '@mui/material';
 import * as React from 'react';
 
-import { NumericField } from './NumericField.js';
 import { BaseImgParams } from '../api/client.js';
+import { CONFIG_DEFAULTS } from '../config.js';
+import { NumericField } from './NumericField.js';
 
 export interface ImageControlProps {
   params: BaseImgParams;
@@ -18,9 +19,9 @@ export function ImageControl(props: ImageControlProps) {
     <Stack direction='row' spacing={4}>
       <NumericField
         label='CFG'
-        min={0}
-        max={30}
-        step={1}
+        min={CONFIG_DEFAULTS.cfg.min}
+        max={CONFIG_DEFAULTS.cfg.max}
+        step={CONFIG_DEFAULTS.cfg.step}
         value={params.cfg}
         onChange={(cfg) => {
           if (doesExist(props.onChange)) {
@@ -33,9 +34,9 @@ export function ImageControl(props: ImageControlProps) {
       />
       <NumericField
         label='Steps'
-        min={1}
-        max={150}
-        step={1}
+        min={CONFIG_DEFAULTS.steps.min}
+        max={CONFIG_DEFAULTS.steps.max}
+        step={CONFIG_DEFAULTS.steps.step}
         value={params.steps}
         onChange={(steps) => {
           if (doesExist(props.onChange)) {
@@ -50,9 +51,9 @@ export function ImageControl(props: ImageControlProps) {
     <Stack direction='row' spacing={4}>
       <NumericField
         label='Seed'
-        min={-1}
-        max={Number.MAX_SAFE_INTEGER}
-        step={1}
+        min={CONFIG_DEFAULTS.seed.min}
+        max={CONFIG_DEFAULTS.seed.max}
+        step={CONFIG_DEFAULTS.seed.step}
         value={params.seed}
         onChange={(seed) => {
           if (doesExist(props.onChange)) {
@@ -64,7 +65,7 @@ export function ImageControl(props: ImageControlProps) {
         }}
       />
       <IconButton onClick={() => {
-        const seed = Math.floor(Math.random() * Number.MAX_SAFE_INTEGER);
+        const seed = Math.floor(Math.random() * CONFIG_DEFAULTS.seed.max);
         if (doesExist(props.onChange)) {
           props.onChange({
             ...params,
diff --git a/gui/src/components/Img2Img.tsx b/gui/src/components/Img2Img.tsx
index 4013f8ce..6d8c7445 100644
--- a/gui/src/components/Img2Img.tsx
+++ b/gui/src/components/Img2Img.tsx
@@ -4,7 +4,7 @@ import * as React from 'react';
 import { useMutation, useQuery } from 'react-query';
 
 import { ApiClient, BaseImgParams } from '../api/client.js';
-import { Config } from '../config.js';
+import { Config, CONFIG_DEFAULTS, STALE_TIME } from '../config.js';
 import { SCHEDULER_LABELS } from '../strings.js';
 import { ImageCard } from './ImageCard.js';
 import { ImageControl } from './ImageControl.js';
@@ -14,7 +14,6 @@ import { QueryList } from './QueryList.js';
 
 const { useState } = React;
 
-export const STALE_TIME = 3_000;
 export interface Img2ImgProps {
   client: ApiClient;
   config: Config;
@@ -52,11 +51,11 @@ export function Img2Img(props: Img2ImgProps) {
   });
 
   const [source, setSource] = useState<File>();
-  const [strength, setStrength] = useState(0.5);
+  const [strength, setStrength] = useState(CONFIG_DEFAULTS.strength.default);
   const [params, setParams] = useState<BaseImgParams>({
-    cfg: 6,
-    seed: -1,
-    steps: 25,
+    cfg: CONFIG_DEFAULTS.cfg.default,
+    seed: CONFIG_DEFAULTS.seed.default,
+    steps: CONFIG_DEFAULTS.steps.default,
     prompt: config.default.prompt,
   });
   const [scheduler, setScheduler] = useState(config.default.scheduler);
@@ -81,10 +80,10 @@ export function Img2Img(props: Img2ImgProps) {
       }} />
       <NumericField
         decimal
-        label='Weight'
-        min={0}
-        max={1}
-        step={0.01}
+        label='Strength'
+        min={CONFIG_DEFAULTS.strength.min}
+        max={CONFIG_DEFAULTS.strength.max}
+        step={CONFIG_DEFAULTS.strength.step}
         value={strength}
         onChange={(value) => {
           setStrength(value);
diff --git a/gui/src/components/OnnxWeb.tsx b/gui/src/components/OnnxWeb.tsx
index 05a1da24..f570dd43 100644
--- a/gui/src/components/OnnxWeb.tsx
+++ b/gui/src/components/OnnxWeb.tsx
@@ -4,11 +4,11 @@ import * as React from 'react';
 import { useQuery } from 'react-query';
 
 import { ApiClient } from '../api/client.js';
-import { Config } from '../config.js';
+import { Config, STALE_TIME } from '../config.js';
 import { MODEL_LABELS, PLATFORM_LABELS } from '../strings.js';
 import { Img2Img } from './Img2Img.js';
 import { QueryList } from './QueryList.js';
-import { STALE_TIME, Txt2Img } from './Txt2Img.js';
+import { Txt2Img } from './Txt2Img.js';
 
 const { useState } = React;
 
diff --git a/gui/src/components/Txt2Img.tsx b/gui/src/components/Txt2Img.tsx
index c68b40f7..a299e13c 100644
--- a/gui/src/components/Txt2Img.tsx
+++ b/gui/src/components/Txt2Img.tsx
@@ -3,7 +3,7 @@ import * as React from 'react';
 import { useMutation, useQuery } from 'react-query';
 
 import { ApiClient, BaseImgParams } from '../api/client.js';
-import { Config } from '../config.js';
+import { Config, CONFIG_DEFAULTS, STALE_TIME } from '../config.js';
 import { SCHEDULER_LABELS } from '../strings.js';
 import { ImageCard } from './ImageCard.js';
 import { ImageControl } from './ImageControl.js';
@@ -13,7 +13,6 @@ import { QueryList } from './QueryList.js';
 
 const { useState } = React;
 
-export const STALE_TIME = 3_000;
 export interface Txt2ImgProps {
   client: ApiClient;
   config: Config;
@@ -41,12 +40,12 @@ export function Txt2Img(props: Txt2ImgProps) {
     staleTime: STALE_TIME,
   });
 
-  const [height, setHeight] = useState(512);
-  const [width, setWidth] = useState(512);
+  const [height, setHeight] = useState(CONFIG_DEFAULTS.height.default);
+  const [width, setWidth] = useState(CONFIG_DEFAULTS.width.default);
   const [params, setParams] = useState<BaseImgParams>({
-    cfg: 6,
-    seed: -1,
-    steps: 25,
+    cfg: CONFIG_DEFAULTS.cfg.default,
+    seed: CONFIG_DEFAULTS.seed.default,
+    steps: CONFIG_DEFAULTS.steps.default,
     prompt: config.default.prompt,
   });
   const [scheduler, setScheduler] = useState(config.default.scheduler);
@@ -71,9 +70,9 @@ export function Txt2Img(props: Txt2ImgProps) {
       <Stack direction='row' spacing={4}>
         <NumericField
           label='Width'
-          min={8}
-          max={512}
-          step={8}
+          min={CONFIG_DEFAULTS.width.min}
+          max={CONFIG_DEFAULTS.width.max}
+          step={CONFIG_DEFAULTS.width.step}
           value={width}
           onChange={(value) => {
             setWidth(value);
@@ -81,9 +80,9 @@ export function Txt2Img(props: Txt2ImgProps) {
         />
         <NumericField
           label='Height'
-          min={8}
-          max={512}
-          step={8}
+          min={CONFIG_DEFAULTS.height.min}
+          max={CONFIG_DEFAULTS.height.max}
+          step={CONFIG_DEFAULTS.height.step}
           value={height}
           onChange={(value) => {
             setHeight(value);
diff --git a/gui/src/config.ts b/gui/src/config.ts
index 9017563d..6b964769 100644
--- a/gui/src/config.ts
+++ b/gui/src/config.ts
@@ -1,4 +1,4 @@
-import { STATUS_SUCCESS } from './api/client.js';
+import { Img2ImgParams, STATUS_SUCCESS, Txt2ImgParams } from './api/client.js';
 
 export interface Config {
   api: {
@@ -21,3 +21,67 @@ export async function loadConfig(): Promise<Config> {
     throw new Error('could not load config');
   }
 }
+
+export interface ConfigRange {
+  default: number;
+  min: number;
+  max: number;
+  step: number;
+}
+
+export type KeyFilter<T extends object> = {
+  [K in keyof T]: T[K] extends number ? K : T[K] extends string ? K : never;
+}[keyof T];
+
+export type ConfigRanges<T extends object> = {
+  [K in KeyFilter<T>]: T[K] extends number ? ConfigRange : T[K] extends string ? string : never;
+};
+
+export const IMAGE_STEP = 8;
+export const IMAGE_MAX = 512;
+
+export const CONFIG_DEFAULTS: ConfigRanges<Required<Img2ImgParams & Txt2ImgParams>> = {
+  cfg: {
+    default: 6,
+    min: 1,
+    max: 30,
+    step: 0.1,
+  },
+  height: {
+    default: IMAGE_MAX,
+    min: IMAGE_STEP,
+    max: IMAGE_MAX,
+    step: IMAGE_STEP,
+  },
+  model: '',
+  negativePrompt: '',
+  platform: '',
+  prompt: 'an astronaut eating a hamburger',
+  scheduler: '',
+  steps: {
+    default: 25,
+    min: 1,
+    max: 200,
+    step: 1,
+  },
+  seed: {
+    default: -1,
+    min: -1,
+    max: (2 ** 32) - 1,
+    step: 1,
+  },
+  strength: {
+    default: 0.5,
+    min: 0,
+    max: 1,
+    step: 0.01,
+  },
+  width: {
+    default: IMAGE_MAX,
+    min: IMAGE_STEP,
+    max: IMAGE_MAX,
+    step: IMAGE_STEP,
+  },
+};
+
+export const STALE_TIME = 3_000;