Title: Auto WebP & Alt Optimizer
Author: wodey
Published: <strong>2026 年 1 月 5 日</strong>
Last modified: 2026 年 3 月 26 日

---

搜尋外掛

![](https://ps.w.org/auto-webp-alt-optimizer/assets/banner-772x250.png?rev=3432469)

![](https://ps.w.org/auto-webp-alt-optimizer/assets/icon-256x256.png?rev=3432469)

# Auto WebP & Alt Optimizer

 由 [wodey](https://profiles.wordpress.org/wodey/) 開發

[下載](https://downloads.wordpress.org/plugin/auto-webp-alt-optimizer.zip)

 * [詳細資料](https://tw.wordpress.org/plugins/auto-webp-alt-optimizer/#description)
 * [使用者評論](https://tw.wordpress.org/plugins/auto-webp-alt-optimizer/#reviews)
 *  [安裝方式](https://tw.wordpress.org/plugins/auto-webp-alt-optimizer/#installation)
 * [開發資訊](https://tw.wordpress.org/plugins/auto-webp-alt-optimizer/#developers)

 [技術支援](https://wordpress.org/support/plugin/auto-webp-alt-optimizer/)

## 外掛說明

You know that **Site Speed** and **SEO** are the keys to success.

**Auto WebP & Alt Optimizer** is a lightweight yet powerful tool designed to solve
two major problems automatically:

 1. **Image Size (Speed):** It automatically converts your uploaded JPG/PNG images 
    into the modern **WebP** format. WebP images are significantly smaller (often 30-
    50% smaller) than standard JPEGs.
 2.  * **New in 1.4:** We now use the native PHP GD library (`imagewebp`) to ensure
       compression settings work on all server environments, bypassing common WordPress
       cache issues.
 3. **Image SEO (Ranking):** It automatically cleans up your image filenames (removing
    hyphens and underscores) and sets them as the **Alt Text**. Google relies on Alt
    text to understand images, and this plugin ensures you never forget to fill it 
    in.

### Key Features

 * **Native WebP Conversion:** Uses low-level GD functions to guarantee file size
   reduction.
 * **4 Quality Levels:** Choose from Low (20), Medium (50), High (80), or Very High(
   90) quality presets to suit your needs.
 * **Auto Alt Tags:** Converts `my-product-photo.jpg` to “My Product Photo” automatically.
 * **Zero Bloat:** No complex configuration. Just install, select a level, and forget.

### Why use this plugin?

 * **Boost Core Web Vitals:** Smaller images mean faster LCP (Largest Contentful
   Paint).
 * **Save Storage:** Stop storing duplicate versions of images. original files are
   replaced to save space.
 * **Automate SEO:** Save hours of manual work filling in Alt tags.

> **Note:** This plugin processes images upon upload. It does not currently process
> images already existing in your Media Library.

## 安裝方式

 1. Upload the plugin files to the `/wp-content/plugins/auto-webp-alt-optimizer` directory,
    or install the plugin through the WordPress plugins screen directly.
 2. Activate the plugin through the ‘Plugins’ screen in WordPress.
 3. Go to **Settings -> WebP & Alt Settings** to configure the plugin.
 4. Enable the switch and select your desired Quality Level (Recommended: High – 80).
 5. Done! Upload a new image to test it out.

## 使用者評論

這個外掛目前沒有任何使用者評論。

## 參與者及開發者

以下人員參與了開源軟體〈Auto WebP & Alt Optimizer〉的開發相關工作。

參與者

 *   [ wodey ](https://profiles.wordpress.org/wodey/)

[將〈Auto WebP & Alt Optimizer〉外掛本地化為台灣繁體中文版](https://translate.wordpress.org/projects/wp-plugins/auto-webp-alt-optimizer)

### 對開發相關資訊感興趣？

任何人均可[瀏覽程式碼](https://plugins.trac.wordpress.org/browser/auto-webp-alt-optimizer/)、
查看 [SVN 存放庫](https://plugins.svn.wordpress.org/auto-webp-alt-optimizer/)，或
透過 [RSS](https://plugins.trac.wordpress.org/log/auto-webp-alt-optimizer/?limit=100&mode=stop_on_copy&format=rss)
訂閱[開發記錄](https://plugins.trac.wordpress.org/log/auto-webp-alt-optimizer/)。

## 變更記錄

#### 1.4

 * Changed quality selection to fixed presets (Low, Medium, High, Very High) for
   better usability.
 * Switched to native PHP GD library functions (`imagewebp`) to solve server compatibility
   and caching issues.
 * Added support for retaining PNG transparency.

#### 1.3

 * Improved image resizing logic to force cache refresh.

#### 1.2

 * Fixed Text Domain mismatch issues.
 * Improved sanitization and security.

#### 1.0

 * Initial release.

## 中繼資料

 *  版本 **1.5**
 *  最後更新 **6 個月前**
 *  啟用安裝數 **20+**
 *  WordPress 版本需求 ** 6.0 或更新版本 **
 *  已測試相容的 WordPress 版本 **6.9.9**
 *  PHP 版本需求 ** 7.4 或更新版本 **
 *  語言
 * [English (US)](https://wordpress.org/plugins/auto-webp-alt-optimizer/)
 * 標籤:
 * [auto alt](https://tw.wordpress.org/plugins/tags/auto-alt/)[image compression](https://tw.wordpress.org/plugins/tags/image-compression/)
   [image optimizer](https://tw.wordpress.org/plugins/tags/image-optimizer/)[seo](https://tw.wordpress.org/plugins/tags/seo/)
   [webp](https://tw.wordpress.org/plugins/tags/webp/)
 *  [進階檢視](https://tw.wordpress.org/plugins/auto-webp-alt-optimizer/advanced/)

## 評分

這個項目尚無任何評論記錄。

[撰寫評分](https://wordpress.org/support/plugin/auto-webp-alt-optimizer/reviews/#new-post)

[查看全部使用者評論](https://wordpress.org/support/plugin/auto-webp-alt-optimizer/reviews/)

## 參與者

 *   [ wodey ](https://profiles.wordpress.org/wodey/)

## 技術支援

使用者可在技術支援論壇提出意見反應或使用問題。

 [檢視技術支援論壇](https://wordpress.org/support/plugin/auto-webp-alt-optimizer/)