diff --git a/server/src/lib/__tests__/image-resize.test.js b/server/src/lib/__tests__/image-resize.test.js
index 6e429ef..96d51de 100644
--- a/server/src/lib/__tests__/image-resize.test.js
+++ b/server/src/lib/__tests__/image-resize.test.js
@@ -97,3 +97,65 @@ describe('image-resize', () => {
     await fs.promises.unlink(first.path)
   })
 })
+
+describe('eager image processing', () => {
+  it('generateAllSizes creates all width+format combinations', async () => {
+    const { generateAllSizes } = await import('../image-resize.js')
+    const sharp = (await import('sharp')).default
+    const uuid = 'test-eager-uuid-1'
+    const testImagePath = path.join(UPLOADS_DIR, `${uuid}.png`)
+    await sharp({ create: { width: 2000, height: 1500, channels: 3, background: { r: 255, g: 0, b: 0 } } })
+      .png()
+      .toFile(testImagePath)
+
+    await generateAllSizes(uuid, '', testImagePath)
+
+    const cacheDir = path.join(UPLOADS_DIR, '.cache')
+    for (const width of [320, 640, 1024, 1600]) {
+      for (const format of ['avif', 'webp']) {
+        const cachePath = path.join(cacheDir, `${uuid}_w${width}.${format}`)
+        const exists = await fs.promises.access(cachePath).then(() => true).catch(() => false)
+        expect(exists).toBe(true)
+      }
+    }
+
+    // Cleanup
+    await fs.promises.unlink(testImagePath)
+    for (const width of [320, 640, 1024, 1600]) {
+      for (const format of ['avif', 'webp']) {
+        const cachePath = path.join(cacheDir, `${uuid}_w${width}.${format}`)
+        try {
+          await fs.promises.unlink(cachePath)
+        } catch {
+          // ignore
+        }
+      }
+    }
+  })
+
+  it('convertOriginalToWebp converts and deletes original', async () => {
+    const { convertOriginalToWebp } = await import('../image-resize.js')
+    const sharp = (await import('sharp')).default
+    const uuid = 'test-eager-uuid-2'
+    const testImagePath = path.join(UPLOADS_DIR, `${uuid}.png`)
+    await sharp({ create: { width: 800, height: 600, channels: 3, background: { r: 0, g: 255, b: 0 } } })
+      .png()
+      .toFile(testImagePath)
+
+    const result = await convertOriginalToWebp(uuid, '')
+
+    expect(result).toBe(`/uploads/${uuid}.webp`)
+    const pngExists = await fs.promises.access(testImagePath).then(() => true).catch(() => false)
+    expect(pngExists).toBe(false)
+    const webpPath = path.join(UPLOADS_DIR, `${uuid}.webp`)
+    const webpExists = await fs.promises.access(webpPath).then(() => true).catch(() => false)
+    expect(webpExists).toBe(true)
+
+    // Cleanup
+    try {
+      await fs.promises.unlink(webpPath)
+    } catch {
+      // ignore
+    }
+  })
+})
diff --git a/server/src/lib/image-resize.js b/server/src/lib/image-resize.js
index e0b5d08..4bd7c0f 100644
--- a/server/src/lib/image-resize.js
+++ b/server/src/lib/image-resize.js
@@ -64,3 +64,56 @@ export async function getOrCreateResized(uuid, width, format, subdir = '') {
 }
 
 export { VALID_WIDTHS, SUPPORTED_FORMATS }
+
+/**
+ * Generate all resize widths in AVIF + WebP for eager processing.
+ * @param {string} uuid - UUID without extension
+ * @param {string} subdir - Subdirectory (e.g., 'reviews') or empty
+ * @param {string} originalPath - Full path to the original file
+ */
+export async function generateAllSizes(uuid, subdir, originalPath) {
+  const cacheSubdir = subdir ? subdir : ''
+  const cacheDir = path.join(CACHE_DIR, cacheSubdir)
+  await fs.promises.mkdir(cacheDir, { recursive: true })
+
+  const sharp = (await import('sharp')).default
+
+  for (const width of VALID_WIDTHS) {
+    for (const format of SUPPORTED_FORMATS) {
+      const cacheFileName = `${uuid}_w${width}.${format}`
+      const cachePath = path.join(CACHE_DIR, cacheSubdir, cacheFileName)
+
+      const pipeline = sharp(originalPath).resize(width, null, { withoutEnlargement: true })
+      const options = format === 'avif' ? { quality: 75, effort: 4 } : { quality: 80 }
+      await pipeline[format](options).toFile(cachePath)
+    }
+  }
+}
+
+/**
+ * Convert original file to WebP and delete the source file.
+ * @param {string} uuid - UUID without extension
+ * @param {string} subdir - Subdirectory (e.g., 'reviews') or empty
+ * @returns {string} New URL path like `/uploads/<uuid>.webp`
+ */
+export async function convertOriginalToWebp(uuid, subdir) {
+  const uploadsDir = path.join(process.cwd(), 'uploads')
+  const targetDir = subdir ? path.join(uploadsDir, subdir) : uploadsDir
+
+  const originalPath = await findOriginalFile(uuid, subdir)
+  if (!originalPath) {
+    throw new Error(`Original file not found for UUID: ${uuid}`)
+  }
+
+  const originalExt = path.extname(originalPath).toLowerCase()
+  const webpPath = path.join(targetDir, `${uuid}.webp`)
+
+  const sharp = (await import('sharp')).default
+  await sharp(originalPath).webp({ quality: 80 }).toFile(webpPath)
+
+  if (originalExt !== '.webp') {
+    await fs.promises.unlink(originalPath)
+  }
+
+  return subdir ? `/uploads/${subdir}/${uuid}.webp` : `/uploads/${uuid}.webp`
+}