內容簡介
W3ctrl Smart Image Optimizer 是一款專為 WordPress 設計的圖像優化外掛，能有效減少媒體庫中圖像的大小，並在本地伺服器上進行處理，無需將檔案傳送至遠端優化 API。
【主要功能】
• 支援 JPEG 和 PNG 圖像優化
• 自動優化上傳的圖像
• 提供原始檔案備份與恢復功能
• 支援批次優化與進度追蹤
• 可選擇性連接 Cloudflare 進行快取清除
• 提供 WP-CLI 和 REST API 支援
外掛標籤
開發者團隊
② 後台搜尋「W3ctrl Smart Image Optimizer」→ 直接安裝（推薦）
原文外掛簡介
W3ctrl Smart Image Optimizer reduces Media Library image size on your WordPress server. Files are not sent to a remote optimization API.
It uses WordPress image editors (Imagick or GD). Originals can be backed up before a file is replaced, and a file is replaced only when the result is smaller.
Features
JPEG and PNG optimization, including optional EXIF/metadata stripping
WebP copies next to originals, with optional front-end delivery via a picture element
AVIF copies next to originals when the server can encode AVIF, with optional front-end delivery
Resize oversized originals during optimize, plus a manual resize control on the plugin Media screen
Convert opaque PNG files to JPEG
Skip files above a maximum size or below a minimum size
Exclude JPEG, PNG, WebP, or selected uploads folders
Automatic optimization when images are uploaded
Bulk optimization with progress, pause, cancel, and retry failed
Dry-run savings estimate before a bulk run
Per-image optimize, restore, and resize
Original backups; restore one image, restore all, or delete backups
Dashboard statistics and server capability checks
WP-Cron scheduled optimization
Optional LiteSpeed Cache and Cloudflare URL purge after optimize or restore
Media Library column, row actions, and bulk actions
WP-CLI and a REST API for optimize, stats, and restore
Optional removal of plugin stats and backups on uninstall (Media Library files are never deleted)
Privacy
Images are processed on your own server. The plugin does not phone home and does not add telemetry.
LiteSpeed cache purge (when enabled) runs only on this server when LiteSpeed Cache is present. It does not send data to a remote LiteSpeed service.
External services
This plugin can optionally connect to Cloudflare to purge cached image URLs after an attachment is optimized, restored, or resized.
It sends only the affected media file URLs to api.cloudflare.com, and only when an administrator enables Cloudflare purge and saves a Cloudflare Zone ID and API token in Settings. Image files themselves are not uploaded to Cloudflare. The feature is off by default.
This service is provided by Cloudflare, Inc.:
Terms of Service
Privacy Policy
WP-CLI
wp sio optimize
wp sio optimize --limit=100
wp sio stats
wp sio restore
Developers
Filters and actions include w3ctrl_sio_booted, w3ctrl_sio_after_optimize, w3ctrl_sio_after_restore, w3ctrl_sio_after_resize, and w3ctrl_sio_supported_mime_types.
The admin menu parent slug is w3ctrl. Other W3ctrl plugins can add a submenu under that slug and register themselves on the w3ctrl_admin_plugins filter.
