Title: WebP Optimizer
Author: maliktanveer
Published: <strong>2026年7月5日</strong>
Last modified: 2026年7月5日

---

プラグインを検索

![](https://ps.w.org/webp-optimizer/assets/banner-772x250.png?rev=3596770)

![](https://ps.w.org/webp-optimizer/assets/icon-256x256.png?rev=3596770)

# WebP Optimizer

 作者: [maliktanveer](https://profiles.wordpress.org/maliktanveer/)

[ダウンロード](https://downloads.wordpress.org/plugin/webp-optimizer.1.0.0.zip)

 * [詳細](https://ja.wordpress.org/plugins/webp-optimizer/#description)
 * [レビュー](https://ja.wordpress.org/plugins/webp-optimizer/#reviews)
 *  [インストール](https://ja.wordpress.org/plugins/webp-optimizer/#installation)
 * [開発](https://ja.wordpress.org/plugins/webp-optimizer/#developers)

 [サポート](https://wordpress.org/support/plugin/webp-optimizer/)

## 説明

WebP Optimizer converts WordPress media library JPEG and PNG images to WebP format
through the built-in optimization service. It supports individual attachment conversion,
batch conversion from a dedicated Media Library page, and conversion logs with basic
file-size statistics.

#### Features

 * **Single Image Conversion** – Convert individual images directly from the Media
   Library edit screen
 * **Bulk Conversion** – Convert multiple images at once from the dedicated Bulk
   Convert page
 * **Media Library Integration** – See WebP conversion status and statistics in 
   the Media Library
 * **Configurable Quality** – Adjust compression quality from 1-100
 * **Optimization Levels** – Choose from Ultra, High, Balanced, or Fast conversion
   preferences
 * **Conversion Logs** – Track all conversions with detailed statistics
 * **Supported Formats** – JPEG and PNG images can be converted to WebP

#### How It Works

 1. Install and activate the plugin
 2. Set your preferred quality and optimization level in Settings > WebP Optimizer
 3. Convert images individually from the Media Library or use the Bulk Convert page

#### Backend Requirements

This plugin uses a built-in WebP optimization service. You do not need to enter 
or configure a service endpoint.

### External services

This plugin connects to an external WebP conversion service to convert JPEG and 
PNG images into WebP files. The service is required for the single-image and bulk
conversion features because the image conversion is performed by that external service.

The service is hosted at https://convert-to-webp-delta.vercel.app/ and is provided
by maliktanveer.

When an authorized WordPress user starts a single-image or bulk conversion, the 
plugin sends the selected image file to the service. The request also includes the
original filename, selected quality setting, enhancement preference, optimization
level, and optimization priority. The service processes the submitted image and 
returns the converted WebP file to the WordPress site.

The plugin may also send a connection check request to the service health endpoint.
This request does not include image file data.

Terms of Service: https://convert-to-webp-delta.vercel.app/terms

Privacy Policy: https://convert-to-webp-delta.vercel.app/privacy

## スクリーンショット

[⌊Settings page with quality and optimization configuration⌉⌊Settings page with 
quality and optimization configuration⌉[

Settings page with quality and optimization configuration

[⌊Media Library with WebP status column⌉⌊Media Library with WebP status column⌉[

Media Library with WebP status column

## インストール

 1. Upload the `webp-optimizer` folder to the `/wp-content/plugins/` directory
 2. Activate the plugin through the ‘Plugins’ menu in WordPress
 3. Go to Settings > WebP Optimizer to configure optimization defaults
 4. Start converting images from the Media Library

## FAQ

### What image formats are supported?

JPEG and PNG images are supported for conversion to WebP.

### Does this replace my original images?

No. The plugin creates new WebP versions as separate attachments. Your original 
images remain unchanged.

### Can I revert to the original image?

Yes. Since the original images are preserved, you can always use them instead of
the WebP versions.

### Is there a bulk conversion limit?

There is no built-in limit. However, converting very large numbers of images may
take time depending on your server and the optimization service.

## 評価

このプラグインにはレビューがありません。

## 貢献者と開発者

WebP Optimizer はオープンソースソフトウェアです。以下の人々がこのプラグインに貢献
しています。

貢献者

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

[“WebP Optimizer” をあなたの言語に翻訳しましょう。](https://translate.wordpress.org/projects/wp-plugins/webp-optimizer)

### 開発に興味がありますか ?

[コードを閲覧](https://plugins.trac.wordpress.org/browser/webp-optimizer/)するか、
[SVN リポジトリ](https://plugins.svn.wordpress.org/webp-optimizer/)をチェックする
か、[開発ログ](https://plugins.trac.wordpress.org/log/webp-optimizer/)を [RSS](https://plugins.trac.wordpress.org/log/webp-optimizer/?limit=100&mode=stop_on_copy&format=rss)
で購読してみてください。

## 変更履歴

#### 1.0.0

 * Initial release
 * Single image conversion from Media Library
 * Bulk conversion page
 * Configurable quality and optimization levels
 * Conversion logging and statistics
 * Media Library WebP status column

## メタ

 *  バージョン **1.0.0**
 *  最終更新日 **3日前**
 *  有効インストール数 **10未満**
 *  WordPress バージョン ** 5.8またはそれ以降 **
 *  検証済み最新バージョン: **7.0**
 *  PHP バージョン ** 8.1またはそれ以降 **
 *  言語
 * [English (US)](https://wordpress.org/plugins/webp-optimizer/)
 * タグ
 * [compression](https://ja.wordpress.org/plugins/tags/compression/)[image optimization](https://ja.wordpress.org/plugins/tags/image-optimization/)
   [media library](https://ja.wordpress.org/plugins/tags/media-library/)[performance](https://ja.wordpress.org/plugins/tags/performance/)
   [webp](https://ja.wordpress.org/plugins/tags/webp/)
 *  [詳細を表示](https://ja.wordpress.org/plugins/webp-optimizer/advanced/)

## 評価

レビューはまだ送信されていません。

[Your review](https://wordpress.org/support/plugin/webp-optimizer/reviews/#new-post)

[すべてのレビューを見る](https://wordpress.org/support/plugin/webp-optimizer/reviews/)

## 貢献者

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

## サポート

意見や質問がありますか ?

 [サポートフォーラムを表示](https://wordpress.org/support/plugin/webp-optimizer/)