diff --git a/admin/scripts/resizeImage.js b/admin/scripts/resizeImage.js
new file mode 100644
index 000000000..82a2a4785
--- /dev/null
+++ b/admin/scripts/resizeImage.js
@@ -0,0 +1,92 @@
+import fs from 'fs-extra';
+import path from 'path';
+import {fileURLToPath} from 'url';
+import {program} from 'commander';
+import logger from '@docusaurus/logger';
+import sharp from 'sharp';
+import imageSize from 'image-size';
+
+// You can use it as:
+//
+// # Resize all images in showcase (which is most likely)
+// node admin/scripts/resizeImage.js
+//
+// # Resize specified images / all images in a folder
+// # This does not read folders recursively as of now
+// node admin/scripts/resizeImage.js image1.png some-folder ...
+//
+// By default, showcase images are resized to 640×320; everything else is
+// resized to width 1000. You can explicitly give a width/height as arguments.
+// node admin/scripts/resizeImage.js --width 640 --height 320 image1.png
+
+function maybeParseInt(n) {
+  const res = Number.parseInt(n, 10);
+  if (Number.isNaN(res)) {
+    return undefined;
+  }
+  return res;
+}
+
+const showcasePath = 'src/data/showcase';
+
+program
+  .arguments('[imagePaths...]')
+  .option('-w, --width <width>', 'Image width', maybeParseInt)
+  .option('-h, --height <height>', 'Image height', maybeParseInt)
+  .action(async (imagePaths, options) => {
+    if (imagePaths.length === 0) {
+      imagePaths.push(showcasePath);
+    }
+    const rootDir = fileURLToPath(new URL('../..', import.meta.url));
+    const images = (
+      await Promise.all(
+        imagePaths.map(async (p) =>
+          path.extname(p)
+            ? [path.resolve(rootDir, p)]
+            : (await fs.readdir(p)).map((f) => path.resolve(rootDir, p, f)),
+        ),
+      )
+    )
+      .flat()
+      .filter((p) => ['.png', 'jpg', '.jpeg'].includes(path.extname(p)));
+
+    const stats = {
+      skipped: 0,
+      resized: 0,
+    };
+
+    await Promise.all(
+      images.map(async (imgPath) => {
+        const {width, height} = imageSize(imgPath);
+        const targetWidth =
+          options.width ?? (imgPath.includes(showcasePath) ? 640 : 1000);
+        const targetHeight =
+          options.height ?? (imgPath.includes(showcasePath) ? 320 : undefined);
+        if (
+          width <= targetWidth &&
+          (!targetHeight || height <= targetHeight) &&
+          imgPath.endsWith('.png')
+        ) {
+          // Do not emit if not resized. Important because we can't guarantee
+          // idempotency during resize -> optimization
+          stats.skipped += 1;
+          return;
+        }
+        logger.info`Resized path=${imgPath}: before number=${width}×number=${height}; now number=${targetWidth}×number=${
+          targetHeight ?? Math.floor((height / width) * targetWidth)
+        }`;
+        const data = await sharp(imgPath)
+          .resize(targetWidth, targetHeight, {fit: 'cover', position: 'top'})
+          .png()
+          .toBuffer();
+        await fs.writeFile(imgPath.replace(/jpe?g/, 'png'), data);
+        stats.resized += 1;
+      }),
+    );
+
+    logger.info`Images resizing complete.
+        resized: number=${stats.resized}
+        skipped: number=${stats.skipped}`;
+  });
+
+program.parse(process.argv);
\ No newline at end of file
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