説明
Force Regenerate Thumbnails を使用すると、古い画像サイズをすべて削除し、本当に画像添付ファイルのサムネイルを再生成することができます。
Regenerate all thumbnails from the Tools admin menu. Regenerate batches of images via the Media Library list mode. Select the images to regenerate and then use the Bulk Actions drop-down menu to Force Regenerate Thumbnails. Use attachment actions to regenerate thumbnails for a single image.
Several filters exist for advanced usage. See more via this gist.
スクリーンショット
プラグインがサムネイルを再生成している様子 
チェックボックスと「一括操作」ドロップダウンメニューを使用して、特定の複数の画像サイズを変更できます。
インストール
- 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。
- “Force Regenerate Thumbnails” を検索。
- インストールをクリック。
- 有効化をクリック。
- Go to Tools -> Force Regenerate Thumbnails OR select specific images from the Media Library list mode to regenerate.
評価
2023年4月27日
A very useful plugin which really regenerates all thumbnails and removes the old unnecessary image sizes. Thank you very much!
2023年3月31日
It is MUCH more aggressive than the other thumbnails' regeneration plugins. I can see a great use case if you want to free up hosting storage, that's why I give 5 stars. Anyway, be careful because there are chance to have missing images on frontend depending on several factors. As dev says in the dashboard, take a backup before proceeding.
2023年3月22日
1 reply
As indicated in the title: actually removes unused thumbnails. This is one of the rarest functions in this field. I recommend this plugin!
2023年3月2日
1 reply
Great! everything works, but the previews in the library remain the same.
2022年8月31日
I rarely use plugins that haven't updated for years. But this plugin not only still works perfectly fine, it's even better than many newer products. I've just tried the plugin by Shortpixel, and it simply did not do the job. It is very likely a setting that was wrong. But common, I just wanted to regenerate all thumbnails after changing the thumbnail size. I don't want to read the documentation for that. "Force Regenerate Thumbnails" is still the winner for me. It's a pitty that it hasn't been updated for so long.
2022年2月17日
THE BEST PLUGIN EVER>THANK YOU
貢献者と開発者
変更履歴
2.1.2
- changed: improved i18n for page headings and menu entries, props @alexclassroom
2.1.1
- fixed: invalid trailing comma syntax in PHP 7.2
2.1.0
- added: PHP 8.0 compatibility
- added: support generating thumbnails from original (pre-scaled), on by default
- added: support for PDF thumbnail generation
- added: ability to skip an image by regenerate_thumbs_skip_image filter
- changed: escape all output, sanitize all input
- changed: ensure all strings are i18n
- changed: remove HTML from i18n strings
- changed: improve path lookup function
- fixed: call to set_time_limit() when it is not allowed
2.0.6
- PHP7 互換性を追加
2.0.5
- No timeout limit
2.0.4
- Fix issue when “opendir()” return FALSE (thanks Krody Robert)
2.0.3
- Add debug information on regenerate
- Fix issue with update “_wp_attachment_metadata” and “_wp_attached_file” on windows
2.0.2
- New style for results (thanks @justonarnar)
- Automatic update “_wp_attachment_metadata” and “_wp_attached_file” (thanks @norecipes)
2.0.1
- Fix issue with get_option(‘upload_path’) in WordPress 3.5+ (thanks @DavidLingren)
2.0.0
- Fix error handle
Earlier versions
Please refer to the separate changelog.txt file.