Magnet Media Optimizer – Alt Text, Captions, Descriptions & Convert to WebP

Magnet Media Optimizer is an all-in-one WordPress image optimizer that enhances your media library by automatically filling in ALT text, captions, and descriptions — while also converting images to modern formats like WebP for maximum performance.

Created by Plugin Magnet, this plugin merges the best features of “Alt Bot” and “Upload Converter WebP” into a single, powerful image-optimization toolkit.

Improve your website’s SEO, accessibility, and page speed — automatically.

💻 Demo | 🚀 Get The PRO Version | 🛠 Support | 📄 Documentation

✨ Key Features

🔹 Automatic ALT Text Generation

Automatically generate meaningful ALT text using a configurable priority chain of: – EXIF metadata embedded in the image – File name (cleaned up automatically) – Post/attachment title

Supports: – Bulk generation – Single generation – Auto-generation on upload – Media Library buttons – Missing ALT finder

🔹 Automatic Captions & Descriptions

Fills in an image's caption and description whenever they are left empty, using the same source chain as ALT text, for: – Better SEO – Improved content clarity – Stronger accessibility compliance

Existing captions and descriptions are never overwritten.

🔹 WebP Image Conversion

Automatically convert JPEG/PNG images to WebP on upload.

Includes: – Bulk conversion tool – Adjustable quality slider – Option to keep or delete the original file after conversion – Folder exclusion list

🔹 Missing ALT Text Scanner

A complete admin UI showing: – Images without ALT text – Status indicators – Quick one-click fixes

🔹 Centralized Settings Page

Every behavior above — sources used, auto-generation toggles, WebP quality, original-file handling, excluded folders — is configurable from one Settings screen. No editing options in the database required.

🔹 Performance-Focused

• Lightweight
• No frontend bloat
• Optimized for large libraries
• Compatible with all cache plugins

🔹 Works Everywhere

Fully compatible with: – Media Library (grid & list) – Gutenberg – Elementor – Divi – Bricks – Classic Editor

🤖 AI-Powered Generation (Coming Soon)

A future release will let you connect an OpenAI or Anthropic Claude API key and choose which model generates your ALT text, captions, and descriptions — for richer, context-aware results beyond the current EXIF/filename/title chain. A preview of this option is already visible (disabled) on the plugin's Settings page.

💎 Pro Features (Planned)

• AVIF conversion support
• Batch scheduler for huge libraries
• Custom rules per folder/category
• Cloud compression