Title: Regenerate Thumbnails Author: viper007bond Published: 2008年8月28日 Last modified: 2025年8月20日 --- プラグインを検索 ![](https://ps.w.org/regenerate-thumbnails/assets/banner-772x250.jpg?rev=1753390) ![](https://ps.w.org/regenerate-thumbnails/assets/icon-128x128.png?rev=1753390) # Regenerate Thumbnails 作者: [viper007bond](https://profiles.wordpress.org/viper007bond/) [ダウンロード](https://downloads.wordpress.org/plugin/regenerate-thumbnails.3.1.6.zip) * [詳細](https://ja.wordpress.org/plugins/regenerate-thumbnails/#description) * [レビュー](https://ja.wordpress.org/plugins/regenerate-thumbnails/#reviews) * [インストール](https://ja.wordpress.org/plugins/regenerate-thumbnails/#installation) * [開発](https://ja.wordpress.org/plugins/regenerate-thumbnails/#developers) [サポート](https://wordpress.org/support/plugin/regenerate-thumbnails/) ## 説明 Regenerate Thumbnails は、メディアライブラリにアップされている1枚または複数の画像 から、すべてのサムネイルサイズの再生成を可能にします。 次のような場合に役立ちます : * 新しいサムネイルサイズが追加されて、過去のアップロードにもそのサムネイルサイズ が欲しい時。 * 「設定 メディア」などから、既存のサムネイルサイズの大きさを変更した時。 * 違うアイキャッチ画像サイズを使用する新しい WordPress テーマに変更した時。 サーバー容量削減のために、古い、使用されていないサムネイルを削除する機能も提供し ます。 #### Alex Mills を偲んで 2019年2月に、このプラグインの作者 Alex Mills は[亡くなりました](https://alex.blog/2019/02/27/from-alexs-family/)。 彼は多くのプラグインを残し、それらは Automattic や WordPress コミュニティのメンバー がメンテナンスしていきます。もしこのプラグインが役立つと感じて頂けたなら、オレゴン 健康科学大学への寄付を検討してください。詳しくは[こちら](https://alex.blog/2019/03/13/in-memory-of-alex-donation-link-update/) をご覧ください。 #### 代替案 **WP-CLI** もしサーバーのコマンドラインにアクセスできるなら、このプラグインの代わりに、大量 のサムネイル処理のために高速 (HTTPリクエストのオーバーヘッドが無い) かつ `スクリーン` の中で動作できる [WP-CLI](https://wp-cli.org/) の使用を強く推奨します。詳しくは [`media regenerate` コマンド](https://developer.wordpress.org/cli/commands/media/regenerate/) のドキュメントを参照してください。 **Jetpack の Photon モジュール** [Jetpack](https://jetpack.com/) は、WordPress.com を作成した Automattic によるプラグ インです。セルフホスティングの WordPress サイトに、WordPress.com でホストされたサイト で使用できる一部の機能を提供します。 [Photon モジュール](https://jetpack.com/support/photon/) を使うと、サイトの画像を WordPress.com の CDN 経由で配信するようになり、画像の読み込み速度を向上させます。 重要なのはその都度サムネイルが作成されることで、つまりこのプラグインが必要ないこと を意味します。 自分個人のサイトでは Photon を使用しています。 _注意: 私は Automattic で働いていますが、そうではなかったとしても Photon を勧めます。_ #### ヘルプが必要ですか？バグを見つけましたか？コードで貢献したいですか？ このプラグインのサポートは [WordPress.org のフォーラム](https://wordpress.org/support/plugin/regenerate-thumbnails) で行われています。 このプラグインのソースコードは [GitHub](https://github.com/automattic/regenerate-thumbnails) にあります。 ## スクリーンショット * [[ * プラグインのメイン画面 * [[ * 再生成が進行中。 * [[ * 個別の添付ファイルを再生成する画面。 * [[ * メディアライブラリのリストビューから個別に画像を再生成できます。 * [[ * 添付ファイルの編集画面からも再生成が可能です。 ## インストール 1. 管理画面に移動し、メニューからプラグイン 新規追加を選択してください。 2. “Regenerate Thumbnails” で検索します。 3. インストールをクリックします。 4. 有効化をクリックします。 5. ツール > Regenerate Thumbnails に移動してください。 ## FAQ ### このプラグインは GDPR (https://en.wikipedia.org/wiki/General_Data_Protection_Regulation) に準拠していますか？ このプラグインはユーザーのデータを保存も送信もしません。動くのは管理画面のみで、 ユーザーの見るサイトの部分では何もしません。つまり準拠しているということになります が、私は弁護士では無いです。 ## 評価 ![](https://secure.gravatar.com/avatar/7aa41005ae28f04bd8f01838d779b13a32a8a7126db03f47f2fd8ca753950fda? s=60&d=retro&r=g) ### 󠀁[Works Pretty Well](https://wordpress.org/support/topic/works-pretty-well-59/)󠁿 [zack00](https://profiles.wordpress.org/zack00/) 2026年3月13日 1 reply Used it to fix image sizes after changing my theme. Did the job without much hassle. Took some time but worked fine. Pretty useful plugin overall. tnx to the devs for keeping it simple. ![](https://secure.gravatar.com/avatar/1e7fa8c66b78dd104909825091009b61dc2278649482a2fbd9a8f08dcfa64dc6? s=60&d=retro&r=g) ### 󠀁[Very, very, very happy with the results](https://wordpress.org/support/topic/very-very-very-happy-with-the-results/)󠁿 [JHouse](https://profiles.wordpress.org/jhouse/) 2025年10月28日 1 reply For layout and design purposes, I opted to increase the size of all my featured image thumbnails moving forward, but you guessed it, I still had to resize the previous photos. Well, this plugin handled it like a champ! Even removed the ones I wasn’t using any longer so I could free up some server space. Admittedly, I was a bit scared running this plugin for the first time, however, I made backup of my website files and database before doing so in the event sh!t went south. Not only did it resize them perfectly, it restored some thumbnails that were missing. Now all is awesome! Thanks for such a great plugin! I will use this exclusively in the future. ![](https://secure.gravatar.com/avatar/092a97745e197831fa94a8f87f712bdea6f0de9961635a2bead86bf5d316b303? s=60&d=retro&r=g) ### 󠀁[Screwed all the references to images in a Portrait orientation](https://wordpress.org/support/topic/screwed-all-the-references-to-images-in-a-portrait-orientation/)󠁿 [chrisdubea](https://profiles.wordpress.org/chrisdubea/) 2025年9月5日 1 reply Yea, That was stupid. Foolishly used this, still don’t know why. Screwed up all my references to images in a Portrait orientation. Luckily I was able to figure it out and with Better Search Replace was able to fix 326 instances of the wrong reference. ![](https://secure.gravatar.com/avatar/d3eabb26a08f10b007449759158c4c9ad4da9560e0548f4fa9635c62e1682f61? s=60&d=retro&r=g) ### 󠀁[Thanks!](https://wordpress.org/support/topic/thanks-2580/)󠁿 [sjcm94](https://profiles.wordpress.org/sjcm94/) 2025年8月28日 1 reply Thank you, Alex, for still supporting us. ![](https://secure.gravatar.com/avatar/92d61e1e103b9a741e3a0c59c9f91f5ac0aa26ff3f6e0f799b75cd2e831ccbd8? s=60&d=retro&r=g) ### 󠀁[Works. Good info too](https://wordpress.org/support/topic/works-good-info-too/)󠁿 [moviemoon](https://profiles.wordpress.org/moviemoon/) 2025年3月12日 1 reply I really like this plug-in. I don’t need it very often but when I do it works great. For example when I changed the image size for my blog thumbnails and thought i would have a headache! It shows nice info about images and which sizes will be generated too. Useful. Thank you. ![](https://secure.gravatar.com/avatar/fff0c98ff4d4a93b60303319da74d158898e262d694144992f1bcba2cc2d2ad0? s=60&d=retro&r=g) ### 󠀁[Good cleanup tool](https://wordpress.org/support/topic/good-cleanup-tool/)󠁿 [Denny Müller](https://profiles.wordpress.org/redaquamedia/) 2024年11月20日 1 reply Works fine and does what it describes. And sorry to hear, that Alex has passed away. [ 395件のレビューをすべて表示 ](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/) ## 貢献者と開発者 Regenerate Thumbnails 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 * [ Alex Mills ](https://profiles.wordpress.org/viper007bond/) “Regenerate Thumbnails” は38ロケールに翻訳されています。 [翻訳者](https://translate.wordpress.org/projects/wp-plugins/regenerate-thumbnails/contributors) のみなさん、翻訳へのご協力ありがとうございます。 [“Regenerate Thumbnails” をあなたの言語に翻訳しましょう。](https://translate.wordpress.org/projects/wp-plugins/regenerate-thumbnails) ### 開発に興味がありますか ? [コードを閲覧](https://plugins.trac.wordpress.org/browser/regenerate-thumbnails/) するか、[SVN リポジトリ](https://plugins.svn.wordpress.org/regenerate-thumbnails/) をチェックするか、[開発ログ](https://plugins.trac.wordpress.org/log/regenerate-thumbnails/) を [RSS](https://plugins.trac.wordpress.org/log/regenerate-thumbnails/?limit=100&mode=stop_on_copy&format=rss) で購読してみてください。 ## 変更履歴 #### Version 3.1.6 * Fix: Respect “Skip regenerating existing correctly sized thumbnails” setting. * Fix: Don’t delete all thumbnails when deleting old unregistered thumbnails size. #### Version 3.1.5 * Fix: Don’t overwrite ‘All X Attachment’ button label with featured images count. * Tested successfully with PHP 8.1. * Tested successfully with PHP 8.2. #### Version 3.1.4 * Fix: Don’t attempt to regenerate SVG’s. * Bump tested version. * 依存関係を更新しました。 #### Version 3.1.3 * Update plugin dependencies to the latest version. #### Version 3.1.2 * Use wp_get_original_image_path() in WordPress 5.3 #### Version 3.1.1 * Minor fix to avoid a divide by zero error when displaying thumbnail filenames. #### Version 3.1.0 * Bring back the ability to delete old, unregistered thumbnail sizes. Support for updating post contents is still disabled (too buggy). * Various code improvements including string localization disambiguation. #### Version 3.0.2 * Fix slowdown in certain cases in the media library. * Fix not being able to regenerate existing thumbnails for single images. Props @idofri. * Fix JavaScript error that could occur if the REST API response was unexpected( empty or PHP error). * Fix bug related to multibyte filenames. * If an image is used as the featured image on multiple posts, only regenerate it once instead of once per post. #### Version 3.0.1 * Temporarily disable the update post functionality. I tested it a lot but it seems there’s still some bugs. * Temporarily disable the delete old thumbnails functionality. It seems to work fine but without the update post functionality, it’s not as useful. * Try to more gracefully handle cases where there’s missing metadata for attachments. * Wait until `init` to initialize the plugin so themes can filter the plugin’s capability. `plugins_loaded` is too early. * Fix a JavaScript error that would cause the whole regeneration process to stop if an individual image returned non-JSON, such as a 500 error code. * Accept GET requests for the regenerate REST API endpoint instead of just POSTs. For some reasons some people’s sites are using GET despite the code saying use POST. * Make the attachment ID clickable in error messages. * Fetch 25 attachments at a time instead of 5. I was using 5 for testing. * PHP notice fixes. #### Version 3.0.0 * Complete rewrite from scratch using Vue.js and the WordPress REST API. #### Version 2.2.4 * Better AJAX response error handling in the JavaScript. This should fix a long- standing bug in this plugin. Props Hew Sutton. #### Version 2.2.3 * Make the capability required to use this plugin filterable so themes and other plugins can change it. Props [Jackson Whelan](http://jacksonwhelan.com/). #### Version 2.2.2 * Don’t check the nonce until we’re sure that the action called was for this plugin. Fixes lots of “Are you sure you want to do this?” error messages. #### Version 2.2.1 * Fix the bottom bulk action dropdown. Thanks Stefan for pointing out the issue! #### Version 2.2.0 * Changes to the Bulk Action functionality were made shortly before the release of WordPress 3.1 which broke the way I implemented the specific multiple image regeneration feature. This version adds to the Bulk Action menu using Javascript as that’s the only way to do it currently. #### Version 2.1.3 * Move the `error_reporting()` call in the AJAX handler to the beginning so that we’re more sure that no PHP errors are outputted. Some hosts disable usage of` set_time_limit()` and calling it was causing a PHP warning to be outputted. #### Version 2.1.2 * When regenerating all images, newest images are done first rather than the oldest. * Fixed a bug with regeneration error reporting in some browsers. Thanks to pete- sch for reporting the error. * Supress PHP errors in the AJAX handler to avoid sending an invalid JSON response. Thanks to pete-sch for reporting the error. * Better and more detailed error reporting for when `wp_generate_attachment_metadata()` fails. #### Version 2.1.1 * Clean up the wording a bit to better match the new features and just be easier to understand. * スクリーンショットを更新。 #### Version 2.1.0 多くの新機能 * Thanks to a lot of jQuery help from [Boris Schapira](http://borisschapira.com/), a failed image regeneration will no longer stop the whole process. * The results of each image regeneration is now outputted. You can easily see which images were successfully regenerated and which failed. Was inspired by a concept by Boris. * There is now a button on the regeneration page that will allow you to abort resizing images for any reason. Based on code by Boris. * You can now regenerate single images from the Media page. The link to do so will show up in the actions list when you hover over the row. * You can now bulk regenerate multiple from the Media page. Check the boxes and then select “Regenerate Thumbnails” form the “Bulk Actions” dropdown. WordPress 3.1+ only. * The total time that the regeneration process took is now displayed in the final status message. * jQuery UI Progressbar version upgraded. #### Version 2.0.3 * Switch out deprecated function call. #### Version 2.0.2 * Directly query the database to only fetch what the plugin needs (the attachment ID). This will reduce the memory required as it’s not storing the whole row for each attachment. #### Version 2.0.1 * I accidentally left a `check_admin_referer()` (nonce check) commented out. #### Version 2.0.0 * Recoded from scratch. Now uses an AJAX request per attachment to do the resizing. No more PHP maximum execution time errors or anything like that. Also features a pretty progress bar to let the user know how it’s going. #### Version 1.1.0 * WordPress 2.7 updates — code + UI. Thanks to jdub and Patrick F. #### Version 1.0.0 * 最初のリリース。 #### Upgrade Notice WordPress 5.3に対応 ## メタ * バージョン **3.1.6** * 最終更新日 **8か月前** * 有効インストール数 **1百万以上** * WordPress バージョン ** 4.7またはそれ以降 ** * 検証済み最新バージョン: **6.8.5** * PHP バージョン ** 5.2.4またはそれ以降 ** * 言語 * [Albanian](https://sq.wordpress.org/plugins/regenerate-thumbnails/)、[Bulgarian](https://bg.wordpress.org/plugins/regenerate-thumbnails/)、 [Catalan](https://ca.wordpress.org/plugins/regenerate-thumbnails/)、[Chinese (China)](https://cn.wordpress.org/plugins/regenerate-thumbnails/)、 [Chinese (Taiwan)](https://tw.wordpress.org/plugins/regenerate-thumbnails/)、 [Croatian](https://hr.wordpress.org/plugins/regenerate-thumbnails/)、[Czech](https://cs.wordpress.org/plugins/regenerate-thumbnails/)、 [Danish](https://da.wordpress.org/plugins/regenerate-thumbnails/)、[Dutch](https://nl.wordpress.org/plugins/regenerate-thumbnails/)、 [English (Australia)](https://en-au.wordpress.org/plugins/regenerate-thumbnails/)、 [English (Canada)](https://en-ca.wordpress.org/plugins/regenerate-thumbnails/)、 [English (New Zealand)](https://en-nz.wordpress.org/plugins/regenerate-thumbnails/)、 [English (South Africa)](https://en-za.wordpress.org/plugins/regenerate-thumbnails/)、 [English (UK)](https://en-gb.wordpress.org/plugins/regenerate-thumbnails/)、[English (US)](https://wordpress.org/plugins/regenerate-thumbnails/)、 [Finnish](https://fi.wordpress.org/plugins/regenerate-thumbnails/)、[French (France)](https://fr.wordpress.org/plugins/regenerate-thumbnails/)、 [Galician](https://gl.wordpress.org/plugins/regenerate-thumbnails/)、[German](https://de.wordpress.org/plugins/regenerate-thumbnails/)、 [Greek](https://el.wordpress.org/plugins/regenerate-thumbnails/)、[Hungarian](https://hu.wordpress.org/plugins/regenerate-thumbnails/)、 [Italian](https://it.wordpress.org/plugins/regenerate-thumbnails/)、[Japanese](https://ja.wordpress.org/plugins/regenerate-thumbnails/)、 [Korean](https://ko.wordpress.org/plugins/regenerate-thumbnails/)、[Norwegian (Bokmål)](https://nb.wordpress.org/plugins/regenerate-thumbnails/)、 [Persian](https://fa.wordpress.org/plugins/regenerate-thumbnails/)、[Polish](https://pl.wordpress.org/plugins/regenerate-thumbnails/)、 [Portuguese (Brazil)](https://br.wordpress.org/plugins/regenerate-thumbnails/)、 [Portuguese (Portugal)](https://pt.wordpress.org/plugins/regenerate-thumbnails/)、 [Romanian](https://ro.wordpress.org/plugins/regenerate-thumbnails/)、[Russian](https://ru.wordpress.org/plugins/regenerate-thumbnails/)、 [Spanish (Argentina)](https://es-ar.wordpress.org/plugins/regenerate-thumbnails/)、 [Spanish (Chile)](https://cl.wordpress.org/plugins/regenerate-thumbnails/)、[Spanish (Colombia)](https://es-co.wordpress.org/plugins/regenerate-thumbnails/)、 [Spanish (Spain)](https://es.wordpress.org/plugins/regenerate-thumbnails/)、[Spanish (Venezuela)](https://ve.wordpress.org/plugins/regenerate-thumbnails/)、 [Swedish](https://sv.wordpress.org/plugins/regenerate-thumbnails/)、[Turkish](https://tr.wordpress.org/plugins/regenerate-thumbnails/)、 [Ukrainian](https://uk.wordpress.org/plugins/regenerate-thumbnails/). * [プラグインを翻訳](https://translate.wordpress.org/projects/wp-plugins/regenerate-thumbnails) * タグ * [post thumbnail](https://ja.wordpress.org/plugins/tags/post-thumbnail/)[post thumbnails](https://ja.wordpress.org/plugins/tags/post-thumbnails/) [thumbnail](https://ja.wordpress.org/plugins/tags/thumbnail/)[thumbnails](https://ja.wordpress.org/plugins/tags/thumbnails/) * [詳細を表示](https://ja.wordpress.org/plugins/regenerate-thumbnails/advanced/) ## 評価 5つ星中4.6つ星 * [ 340 5-星レビュー ](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/?filter=5) * [ 18 4-星レビュー ](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/?filter=4) * [ 3 3-星レビュー ](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/?filter=3) * [ 8 2-星レビュー ](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/?filter=2) * [ 26 1-星レビュー ](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/#new-post) [すべてのレビューを見る](https://wordpress.org/support/plugin/regenerate-thumbnails/reviews/) ## 貢献者 * [ Alex Mills ](https://profiles.wordpress.org/viper007bond/) ## 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/regenerate-thumbnails/)