diff --git a/src/analytics/features/types.ts b/src/analytics/features/types.ts
index 2905969fc9..d851b00ead 100644
--- a/src/analytics/features/types.ts
+++ b/src/analytics/features/types.ts
@@ -9,6 +9,7 @@ export enum Features {
   ImportContactsOnboardingDisable = 'import_contacts:onboarding:disable',
   ImportContactsSettingsDisable = 'import_contacts:settings:disable',
   LiveNowBetaDisable = 'live_now_beta:disable',
+  ImageUploadsHighResolution = 'image_uploads:high_resolution',
 
   AATest = 'aa-test',
 }
diff --git a/src/analytics/metrics/types.ts b/src/analytics/metrics/types.ts
index 248965fd6d..ae1217df85 100644
--- a/src/analytics/metrics/types.ts
+++ b/src/analytics/metrics/types.ts
@@ -230,6 +230,9 @@ export type Events = {
 
   'composer:gif:open': {}
   'composer:gif:select': {}
+  'composer:image:edit': {
+    platform: Platform['OS']
+  }
   'composerPrompt:press': {}
   'composerPrompt:camera:press': {}
   'composerPrompt:gallery:press': {}
diff --git a/src/lib/api/index.ts b/src/lib/api/index.ts
index 9eac9d6d4a..8755da5a23 100644
--- a/src/lib/api/index.ts
+++ b/src/lib/api/index.ts
@@ -51,10 +51,15 @@ interface PostOpts {
   langs?: string[]
 }
 
+type FeatureFlags = {
+  highResolutionImages?: boolean
+}
+
 export async function post(
   agent: BskyAgent,
   queryClient: QueryClient,
   opts: PostOpts,
+  featureFlags?: FeatureFlags,
 ) {
   const thread = opts.thread
   opts.onStateChange?.(t`Processing...`)
@@ -91,6 +96,7 @@ export async function post(
       queryClient,
       draft,
       opts.onStateChange,
+      featureFlags,
     )
     let labels: $Typed<ComAtprotoLabelDefs.SelfLabels> | undefined
     if (draft.labels.length) {
@@ -230,6 +236,7 @@ async function resolveEmbed(
   queryClient: QueryClient,
   draft: PostDraft,
   onStateChange: ((state: string) => void) | undefined,
+  featureFlags?: FeatureFlags,
 ): Promise<
   | $Typed<AppBskyEmbedImages.Main>
   | $Typed<AppBskyEmbedVideo.Main>
@@ -240,7 +247,13 @@ async function resolveEmbed(
 > {
   if (draft.embed.quote) {
     const [resolvedMedia, resolvedQuote] = await Promise.all([
-      resolveMedia(agent, queryClient, draft.embed, onStateChange),
+      resolveMedia(
+        agent,
+        queryClient,
+        draft.embed,
+        onStateChange,
+        featureFlags,
+      ),
       resolveRecord(agent, queryClient, draft.embed.quote.uri),
     ])
     if (resolvedMedia) {
@@ -263,6 +276,7 @@ async function resolveEmbed(
     queryClient,
     draft.embed,
     onStateChange,
+    featureFlags,
   )
   if (resolvedMedia) {
     return resolvedMedia
@@ -288,6 +302,7 @@ async function resolveMedia(
   queryClient: QueryClient,
   embedDraft: EmbedDraft,
   onStateChange: ((state: string) => void) | undefined,
+  featureFlags?: FeatureFlags,
 ): Promise<
   | $Typed<AppBskyEmbedExternal.Main>
   | $Typed<AppBskyEmbedImages.Main>
@@ -303,7 +318,9 @@ async function resolveMedia(
     const images: AppBskyEmbedImages.Image[] = await Promise.all(
       imagesDraft.map(async (image, i) => {
         logger.debug(`Compressing image #${i}`)
-        const {path, width, height, mime} = await compressImage(image)
+        const {path, width, height, mime} = await compressImage(image, {
+          highResolution: featureFlags?.highResolutionImages,
+        })
         logger.debug(`Uploading image #${i}`)
         const res = await uploadBlob(agent, path, mime)
         return {
diff --git a/src/state/gallery.ts b/src/state/gallery.ts
index a3e35ac26c..d6977817a2 100644
--- a/src/state/gallery.ts
+++ b/src/state/gallery.ts
@@ -200,10 +200,24 @@ export function resetImageManipulation(
   return img
 }
 
-export async function compressImage(img: ComposerImage): Promise<PickerImage> {
+export async function compressImage(
+  img: ComposerImage,
+  options?: {
+    highResolution?: boolean
+  },
+): Promise<PickerImage> {
   const source = img.transformed || img.source
 
-  const [w, h] = containImageRes(source.width, source.height, POST_IMG_MAX)
+  const [w, h] = containImageRes(
+    source.width,
+    source.height,
+    options?.highResolution
+      ? {
+          width: 4000,
+          height: 4000,
+        }
+      : POST_IMG_MAX,
+  )
 
   let minQualityPercentage = 0
   let maxQualityPercentage = 101 // exclusive
diff --git a/src/view/com/composer/Composer.tsx b/src/view/com/composer/Composer.tsx
index 04d2145e10..2d076690d2 100644
--- a/src/view/com/composer/Composer.tsx
+++ b/src/view/com/composer/Composer.tsx
@@ -825,12 +825,21 @@ export const ComposePost = ({
     try {
       logger.info(`composer: posting...`)
       postUri = (
-        await apilib.post(agent, queryClient, {
-          thread,
-          replyTo: replyTo?.uri,
-          onStateChange: setPublishingStage,
-          langs: currentLanguages,
-        })
+        await apilib.post(
+          agent,
+          queryClient,
+          {
+            thread,
+            replyTo: replyTo?.uri,
+            onStateChange: setPublishingStage,
+            langs: currentLanguages,
+          },
+          {
+            highResolutionImages: ax.features.enabled(
+              ax.features.ImageUploadsHighResolution,
+            ),
+          },
+        )
       ).uris[0]
 
       /*
diff --git a/src/view/com/composer/photos/Gallery.tsx b/src/view/com/composer/photos/Gallery.tsx
index a99bdac394..2ad91fa594 100644
--- a/src/view/com/composer/photos/Gallery.tsx
+++ b/src/view/com/composer/photos/Gallery.tsx
@@ -4,6 +4,7 @@ import {
   type ImageStyle,
   Keyboard,
   type LayoutChangeEvent,
+  Platform,
   StyleSheet,
   TouchableOpacity,
   View,
@@ -24,6 +25,7 @@ import {Admonition} from '#/components/Admonition'
 import * as Dialog from '#/components/Dialog'
 import {MediaInsetBorder} from '#/components/MediaInsetBorder'
 import {Text} from '#/components/Typography'
+import {useAnalytics} from '#/analytics'
 import {IS_IOS, IS_NATIVE} from '#/env'
 import {type PostAction} from '../state/composer'
 import {EditImageDialog} from './EditImageDialog'
@@ -147,6 +149,7 @@ const GalleryItem = ({
 }: GalleryItemProps): React.ReactNode => {
   const {_} = useLingui()
   const t = useTheme()
+  const ax = useAnalytics()
 
   const altTextControl = Dialog.useDialogControl()
   const editControl = Dialog.useDialogControl()
@@ -161,6 +164,10 @@ const GalleryItem = ({
   }
 
   const onImageEdit = () => {
+    ax.metric('composer:image:edit', {
+      platform: Platform.OS,
+    })
+
     if (IS_NATIVE) {
       cropImage(image).then(next => {
         onChange(next)