AltPost – Free AI Alt Text, No API Keys

AltPost is an AI alt text generator for WordPress that creates SEO-friendly image alt text for new uploads and your existing media library. There is no API key to create and no OpenAI account to manage — AltPost Managed handles the AI for you.

Start free (60 images in your first month, then 15/month), then scale with bulk generation built for WooCommerce stores, publishers, agencies, and image-heavy WordPress sites.

AltPost also includes optional AI image renaming so generic files like image-1.jpg , IMG_1234.png , or DSC0001.jpg become clear, descriptive, SEO-friendly filenames as part of the same workflow.

Built by A63 Digital, a working WordPress agency in Dublin, Ireland.

Included in this free plugin

• Vision-based alt text — the AI actually sees and describes your images
• Optional AI renaming of generic filenames (e.g. image-1.jpg → descriptive-slug.jpg)
• Batch runner with Start / Pause / Stop controls
• Inline editable results table with debounced autosave
• Rollback to previous alt text with one click
• Filename-as-alt detection (treats IMG_1234.jpg as missing)
• Alt Text Health Score — 0–100 site score with issue filters
• Compliance Report export (Print/PDF + CSV) for alt text documentation
• WPML and Polylang compatible — alt text in every language of your site
• Batch history with one-click undo for entire runs
• Optional sync of alt text into post content (Gutenberg, classic, Elementor) — off by default
• WP-CLI: wp altpost scan , generate , and rollback
• Compatibility with major page builders (Gutenberg, Elementor, Beaver Builder, Divi, WPBakery, Bricks, Oxygen)
• Cache plugin support (WP Rocket, W3 Total Cache, LiteSpeed Cache, and others)

Use AltPost as an alt text checker: it scans your media library for images with missing alt text or filename-based placeholders such as IMG_1234.jpg , then lets you generate proper descriptions for those images in bulk.