內容簡介
EffortLess Simple Image Optimiser 是一款能夠自動壓縮、調整大小及轉換圖片的 WordPress 外掛，能在上傳時即時優化圖片，並提供管理工具來處理媒體庫中的現有圖片，提升網站性能與載入速度。
【主要功能】
• 上傳時自動優化圖片
• JPEG、PNG 格式壓縮
• 支援 PNG 轉 JPEG 轉換
• 圖片大小調整與比例維持
• 批次優化媒體庫中的圖片
• 找出並移除重複檔案
外掛標籤
開發者團隊
② 後台搜尋「EffortLess Simple Image Optimiser」→ 直接安裝（推薦）
原文外掛簡介
Effortless Simple Image Optimiser hooks directly into the WordPress Media Library upload pipeline and compresses, resizes and (optionally) converts images the moment they are uploaded — all using the built-in PHP GD extension. It also provides admin tools under Settings → Image Optimiser to process images already in your Media Library, find and remove duplicate files, regenerate thumbnails, and manage the original-file backups the plugin keeps automatically.
Upload-time optimisation
JPEG compression — re-encodes JPEGs at a configurable quality level (default: 82). GD strips EXIF metadata automatically, further reducing file size.
PNG compression — applies lossless GD compression to PNG files.
PNG → JPEG conversion — converts opaque (non-transparent) PNGs to JPEG for significant space savings. Transparent PNGs are always kept as PNG.
Image resizing — scales down images that exceed a configurable maximum width or height while maintaining the original aspect ratio.
WebP generation — optionally saves a .webp sidecar file alongside every optimised image (requires GD compiled with WebP support).
Automatic original backup — before any image is optimised, the plugin saves an untouched copy of the original file. This happens every time, with no setting to turn it off — see the Originals tab below to restore or discard these backups.
Graceful degradation — if GD is not available the plugin skips processing and logs a notice; uploads are never blocked.
Bulk Optimise tab
Processes every image already in your Media Library using your current settings, one image at a time. Shows total / optimised / pending counts, offers a “re-optimise all” option to force reprocessing, and includes a ghost-attachment scanner (finds and lets you delete Media Library records whose file no longer exists on disk). On a large library, both counting and processing automatically continue across as many requests as needed rather than stopping partway through.
Regenerate Thumbnails tab
Regenerates every registered thumbnail size for existing Media Library images — useful after a theme changes its image sizes or adds new crop dimensions. Also scales across a library of any size the same way as Bulk Optimise.
Find Duplicates tab
Scans the Media Library for exact duplicate image files (compared by file hash). The oldest copy (lowest attachment ID) is always kept; the “Fix all duplicates” action updates every reference to a duplicate in post content, post meta and featured images to point at the kept copy, then deletes the redundant files.
Originals tab
Shows how many original backups are stored and how much disk space they use. Restore all originals copies every stored original back over its optimised version, removes any WebP sidecar, and regenerates thumbnails. Discard all originals permanently deletes the stored backups to free disk space — do this only once you are satisfied with the optimised results, since restoring is no longer possible afterwards for a discarded image.
Settings
Navigate to Settings → Image Optimiser to configure:
Enable / disable automatic optimisation on upload
JPEG quality (1–100, default 82)
Enable PNG → JPEG conversion
Enable WebP sidecar generation + WebP quality
Enable / disable resizing
Maximum width in pixels (default 1920)
Maximum height in pixels (default 1920)
Requirements
PHP 7.4 or higher
PHP GD extension (enabled on virtually all shared hosting)
WordPress 5.9 or higher
