Altivo: AI Alt Text Generator

Altivo is a WordPress plugin that uses Microsoft Florence-2 AI to automatically generate alt text, captions, and descriptions for images directly in the browser, eliminating server load and API costs.

What is Altivo?

Altivo is a WordPress plugin for automated image SEO. It takes images from your media library or user uploads and outputs optimized alt text, captions, titles, and descriptions. It runs entirely client-side using WebAssembly and ONNX, leveraging Microsoft Florence-2 models without any server-side processing or per-image fees. The plugin is developed by Palleon, the team behind the Palleon WordPress image editor, and integrates with DeepL for multilingual translation.

Key Features

• Zero-cost AI analysis — Florence-2 models run locally in the browser via Web Workers, generating alt text and captions at no cost per image.
• Multiple AI tasks — Supports short captions, object detection, dense region descriptions, and more for rich metadata.
• Bulk alt text generation — Scans the entire media library, identifies images with missing alt text, and processes them in batches with real-time progress.
• DeepL translation integration — Automatically translates generated English captions into over 25 languages using your own DeepL API key (free tier available — 500,000 characters/month).
• WooCommerce support — Generates descriptive alt text for product galleries, variations, and categories to improve product visibility in search.
• Native Media Library workflow — Adds "Analyze with Altivo" buttons to the WordPress Media Library for one-click analysis and metadata saving.
• Frontend shortcode [altivo] — Allows site visitors to upload and analyze their own images, with drag-and-drop and instant results, all running client-side.
• File renaming — Optionally transforms complex, unreadable filenames into clean, keyword-optimized structures.

Who is it for?

• WordPress site owners and SEO specialists who need to automate alt text generation for large media libraries to improve search rankings and accessibility.
• E-commerce store managers using WooCommerce who want to ensure product images have descriptive, keyword-rich alt text for better Google Image search performance.
• Multilingual website operators who require automated translation of image metadata across many languages via DeepL integration.

What can you do with Altivo?

• Bulk SEO fix: Run the bulk processor to scan your entire media library and automatically generate missing alt text for thousands of images in minutes.
• E-commerce optimization: Automatically populate alt text for WooCommerce product galleries, variations, and category images to boost click-through rates from image searches.
• User engagement: Embed the [altivo] shortcode on any page to let visitors upload their own images and get AI-generated descriptions, all running on their device with zero server cost.

How does Altivo work?

Altivo downloads Florence-2 models (Base or Large) into the browser cache via WebAssembly. When you click "Analyze with Altivo" on an image, the model processes the image locally and generates a caption. You can then save it to the Alt Text, Caption, or Description field with one click. For bulk processing, the plugin queues all images with missing alt text and processes them sequentially, showing real-time progress. DeepL translation happens after generation if an API key is configured.

Pricing

Altivo is a paid plugin with a one-time purchase price of $14.99. No subscription fees or per-image charges. DeepL translation requires a separate DeepL API key (free tier available for up to 500,000 characters/month).

Pros and cons

• Pros: Zero per-image costs, runs entirely client-side (no server load), supports multiple AI analysis modes, integrates with DeepL for multilingual output, includes bulk processing and WooCommerce support.
• Cons: Requires a modern browser with WebAssembly support (no older browser compatibility noted); translation requires a separate DeepL API key; file renaming is an optional feature not detailed in the interface.

FAQ

How does Altivo improve my website's SEO?

By generating descriptive alt text, Altivo helps search engines index your images accurately, boosting rankings in Google Image Search and improving accessibility for screen reader users.

Is there a monthly fee for image analysis?

No. Altivo processes images entirely in your browser using local Web Workers, so there are no per-image API costs. The plugin is a one-time purchase.

Can my visitors use the AI tool?

Yes. You can place the [altivo] shortcode on any post or page. Visitors can upload their own images and get instant AI descriptions, all running on their device at no cost to you.

Do I need a DeepL API key?

Only if you want to translate generated captions into languages other than English. Altivo's core AI outputs English descriptions natively. DeepL’s free API plan includes 500,000 characters per month.

What are dense region captions?

Dense Region Caption identifies and describes multiple objects and areas within a single image, providing richer metadata than a single global caption.