Erdo Image Optimizer: Compress & Convert to WebP/AVIF (SEO Audit, Alt Text, Lazy Load)

Erdo Image Optimizer is not just another image compression plugin. It is a complete Image SEO & Performance Suite that covers WebP/AVIF conversion, bulk alt text management, filename sanitization, lazy loading, unused media cleanup, and a 6-point SEO audit — all in a single, modern dashboard.

Most image optimization plugins stop at compression. Erdo goes further: every image in your media library receives a professional SEO health score (0 out of 6). You will know exactly which images are hurting your Google rankings and how to fix them, in bulk, in minutes.

Why Erdo Image Optimizer?

• Image SEO Audit (6 Points): Every image gets a score from 0 to 6 based on alt text, filename quality, title, contextual relevance, dimensions, and format. Fix failing criteria with one click — no guesswork.
• WebP & AVIF Converter: One-click conversion from JPEG, PNG, GIF, and HEIC/HEIF to WebP or AVIF. Smart Quality mode automatically finds the smallest file size that still looks great.
• Bulk Alt Text Generation: Automatically generate descriptive alt text from filenames for every image missing it. Fix hundreds of images in seconds — critical for accessibility and image SEO.
• Filename Sanitizer: Transforms messy uploads like IMG_1234 (copy).JPG into SEO-friendly professional-web-design.webp at upload time. Bulk-rename existing images with automatic database reference updates.
• Unused Media Cleanup: Scans your entire library to find images that appear nowhere on your site. Free up disk space and stop confusing search crawlers with orphaned files.
• Lazy Loading & WebP Serving: Inject loading="lazy" into content images automatically. Serve WebP to compatible browsers via .htaccess rewrite (Apache) or PHP <picture> fallback (all servers).
• Background Queue & WP-CLI: Bulk-convert thousands of images via WP-Cron — close the browser tab and let it run. Full CLI support: wp erdo convert, audit, restore, stats, clean-cache.
• BunnyCDN & REST API: Upload converted images directly to BunnyCDN storage. Headless access via /wp-json/erdo/v1/stats and /wp-json/erdo/v1/audit REST endpoints.

Full Feature List

Compression & Conversion

• One-click WebP and AVIF conversion with original backup and one-click restore
• HEIC/HEIF (iPhone photos) conversion to WebP/AVIF via Imagick
• Smart Quality mode — automatically finds the smallest file size that still looks great
• Lossless mode for zero-quality-loss compression
• Max Upload Width — automatically resize oversized images before conversion
• EXIF metadata stripper — reduce file weight and protect photographer privacy
• GIF, JPEG, PNG, HEIC → WebP/AVIF in one click

Image SEO & Alt Text

• Image SEO Auditor with 6-point health score for every image in your library
• Bulk Alt Text — generate alt text from filenames for all images missing it
• Automatic filename sanitization on upload (removes spaces, special chars, uppercase)
• Bulk rename all existing filenames with automatic database reference update
• SEO Audit CSV export — download a full spreadsheet for reporting
• Missing Alt Text filter — focus the dashboard on images that need fixing

Performance & Delivery

• Lazy loading (loading="lazy") injected into content, thumbnails, and gallery images
• WebP serving via .htaccess rewrite (Apache) or PHP <picture> element rewriter
• BunnyCDN integration — upload converted images directly to CDN storage
• Background Queue — bulk convert via WP-Cron, browser tab can be closed

Developer & Dashboard

• REST API: /wp-json/erdo/v1/stats and /wp-json/erdo/v1/audit endpoints
• WP-CLI commands: wp erdo convert, audit, restore, stats, clean-cache
• Dashboard widget — key stats visible from wp-admin home
• Before/After comparison slider — drag to compare original vs optimized
• Right-click context menu on every image card
• Grid size selector (Small / Medium / Large) with localStorage persistence
• SVG upload support with automatic XSS sanitization for administrators
• Multisite / network admin support
• Modern, clean dashboard with format badge and SEO score on every card