Bulk Auto Image Alt Text (Alt tag, Alt attribute) optimizer (image SEO)

Bialty is a WordPress alt text automation plugin. Bialty adds alt text to images dynamically in the rendered frontend HTML. It does not rewrite the Media Library. It uses SEO and editorial context already present in WordPress, such as focus keywords, post titles, product titles, or cleaned image filenames. Bialty is designed for site owners who want broad alt text coverage without destructive database changes, bulk rewrites, or external AI APIs. 👉 Official documentation and product site: bialty.com Quick product facts

• Product type: WordPress alt text automation plugin
• How it works: injects alt text at render time in frontend HTML
• What it does not do: does not rewrite Media Library metadata
• Rule sources: focus keyword, title, image filename, combined modes, manual override
• SEO plugin support: Yoast SEO, Rank Math, SEOPress, All in One SEO
• WooCommerce support: available in Pro
• AI image analysis: not included
• External API calls: none
• Reversible: yes, instantly

What Bialty does Bialty applies a deterministic rule to images when a page is rendered. Depending on your settings and plan, Bialty can use:

• Focus keyword from Yoast SEO
• Focus keyword from Rank Math
• Target keyword from SEOPress
• Primary keyphrase from All in One SEO (AIOSEO)
• Post title
• Product title
• Cleaned image filename
• Combined values such as keyword + title
• Custom manual alt text set per post, page, or product

Bialty is useful for:

• adding alt text where none exists
• replacing existing alt text according to a defined rule
• standardizing alt text logic across a site
• covering WordPress posts and pages
• extending the same logic to WooCommerce and custom post types in Pro

What Bialty does not do Bialty does not do the following:

• it does not rewrite Media Library metadata
• it does not permanently write generated alt text into the database
• it does not visually analyze images
• it does not call any external AI API
• it does not generate unique descriptive captions for each image based on computer vision
• it does not process headers, footers, sidebars, or widget images by default

This distinction matters: Bialty is a contextual rule engine, not an AI vision plugin and not a bulk Media Library rewriting plugin. Why Bialty is different Most image alt text plugins follow one of two models:

1. Bulk rewrite model\ They rewrite alt text inside the Media Library or database.
2. AI vision model\ They send images to an external API and generate descriptive text from image analysis.

Bialty follows a third model:

1. Dynamic contextual injection model\ It injects alt text into frontend HTML at render time using rules and signals already available in WordPress.

This gives Bialty a distinct profile:

• Dynamic frontend injection — alt text is added to rendered HTML
• No Media Library rewrite — stored metadata remains unchanged
• Instant reversibility — disable the plugin and the injected alt text disappears
• No external API — no quota, no per-image cost, no API dependency
• Deterministic behavior — same rule, same output

SEO plugin compatibility Bialty reads keyword data from the SEO plugin already active on the site. Supported integrations:

• Yoast SEO — reads the focus keyword field
• Rank Math — reads the focus keyword field
• SEOPress — reads the target keyword field
• All in One SEO (AIOSEO) — reads the primary keyphrase

If no supported SEO plugin is active, Bialty can still use titles or image filenames as the alt text source. Free edition The free edition covers the core WordPress use case. Included in Free:

• Posts
• Pages
• Missing alt text rule
• Existing alt text rule
• Manual override per post or page
• Disable on homepage
• Debug mode
• Delete settings on deactivation

Free is intended for standard content sites that want dynamic alt text on posts and pages. Commercial edition (Pro) The commercial edition extends Bialty to larger and more complex WordPress stacks. Included in Pro:

• Custom post types
• WooCommerce support
• Product page coverage
• Product gallery controls
• Related products coverage
• Blacklist / exclusion rules
• Add Site Title
• Broader rule combinations
• Product-level manual override

Pro is intended for stores, agencies, and sites using WooCommerce or custom content models. 👉 Compare Free vs Pro\ 👉 WooCommerce documentation 7-day paid trial Bialty Pro offers a 7-day paid trial. Important:

• the trial is not free
• payment is required at checkout
• the trial gives access to the commercial scope so the plugin can be tested on a real site, theme, builder, and WooCommerce stack

This is useful when compatibility must be validated on a production-like environment. Builder and editor compatibility Bialty works when content is rendered through the standard WordPress frontend pipeline. Documented compatible editors and builders include:

• Gutenberg
• Classic Editor / TinyMCE
• Elementor
• SiteOrigin Page Builder

Important technical note: Bialty relies on WordPress rendering filters such as the_content, post_thumbnail_html, and WooCommerce-specific frontend hooks. If a theme, builder, widget, or template bypasses the standard frontend flow, Bialty may not affect those images. Known special case:

• Beaver Builder edit mode — Bialty is disabled in builder edit mode to avoid conflicts

Outside the default scope:

• header images
• footer images
• sidebar images
• widget images
• any image output that bypasses the supported frontend rendering flow

👉 Compatibility details How to verify Bialty is working Bialty changes the rendered frontend HTML. It does not change the Media Library field. To verify Bialty correctly:

1. Open the published page in a browser
2. Do not rely on the editor view
3. Clear all cache layers if caching is active
4. Inspect the <img> element in the rendered page
5. Check the alt attribute

If the alt attribute matches the configured rule, Bialty is working. If the Media Library still shows an empty or unchanged alt field, that is normal. Bialty does not write generated values back to stored metadata. 👉 Full troubleshooting guide Performance profile Bialty is designed to stay lightweight. It does not:

• run a bulk background process
• queue database rewrite jobs
• call external APIs
• add per-image API latency

Instead, Bialty processes the rendered page at request time using local WordPress context. Actual impact depends on theme, builder, caching, and page complexity. Accessibility and editorial note Bialty helps automate alt text coverage and consistency. However, context-specific manual alt text may still be preferable when highly descriptive, accessibility-focused, or editorially precise alt text is required for a particular image. Bialty is best understood as a scalable rule-based automation layer, not as a replacement for manual judgment in every image context. Languages Bialty is translated into 8 languages:

• English
• French
• Spanish
• Portuguese
• German
• Italian
• Dutch
• Russian

Links

• Official site and documentation
• Features
• How it works
• WooCommerce support
• Compatibility
• Pricing and plans
• FAQ
• Troubleshooting
• Blog

About the publisher BIALTY is developed by Pagup, a digital readability firm based in Quebec, Canada. Alt text is not just an accessibility requirement. It is a semantic signal that helps search engines and AI systems understand what your images represent and how they relate to your content. Missing or generic alt texts create interpretive gaps — the system sees an image but cannot determine its role, its subject, or its relationship to the page. BIALTY automates alt text management so that your visual content contributes to your site's overall digital readability instead of creating silent blind spots. Part of the Pagup ecosystem

• pagup.com — Digital readability firm. Diagnostic, semantic architecture, AI governance.
• gautierdorval.com — Doctrine, canonical definitions, interpretive governance research.
• interpretive-governance.org — Formal versioned standard for interpretive governance.

Installing from WordPress

1. Go to Plugins > Add New in WordPress admin
2. Search for "Bialty" or "Bulk Image Alt Text"
3. Click "Install Now"
4. Click "Activate"
5. Open the "Bulk Image Alt Text" menu in the admin sidebar

Installing manually

1. Download the plugin ZIP from this page
2. Unzip it into /wp-content/plugins/bulk-image-alt-text-with-yoast
3. Activate the plugin from the Plugins screen
4. Open "Bulk Image Alt Text" in the admin sidebar

After activation

1. Select the post types Bialty should cover
2. Choose the rule for missing alt text
3. Choose the rule for existing alt text
4. Save settings

No bulk job is required. The selected rule applies on the next frontend page load.

2.2.7

• Updated the bundled Freemius WordPress SDK from 2.13.1 to 2.13.4 for current pricing, payment-history currency, API-timeout, PHP compatibility, and add-on checkout behavior.
• Added contextual PAGUP Agent Control examples for controlled WordPress audits and draft workflows without changing BIALTY's deterministic alt-text model.
• Updated the 8 bundled admin locales for the new interface strings.

2.2.6

• Fix: BIALTY no longer processes the WooCommerce Cart, Checkout and My Account pages. Their markup is now left byte-for-byte unchanged, which prevents DOMDocument parser notices on the transactional forms.
• Fix: empty content (for example a post with no featured image) is now returned unchanged instead of being rewritten, removing a stray newline and related log noise.

2.2.5

• Add SEOPress focus keyword support for generated image alt text.

2.2.4

• Security hardening (metabox nonce) and admin UI maintenance.

2.2.3

• Update Freemius SDK to 2.13.1.

2.2.2

• 🐛 FIX: Security issue
• 👌 IMPROVE: Updated Freemius SDK to v2.13.0

2.2.1

• 🐛 FIX: PHP namespace resolution issue causing problems on specific servers
• 👌 IMPROVE: Updated Freemius SDK to v2.12.0

2.2.0

• 👌 IMPROVE: Frequently Asked Question (FAQ)
• 🐛 FIX: Security issue

2.1.1

• 🐛 FIX: Posts fetch

2.1.0

• 🔥 NEW: Support for All in One SEO (AIOSEO)
• 🔥 NEW: Support for WooCommerce Related Products with Post title as Alt Tag
• 👌 IMPROVE: Loading Blacklist posts via ajax search
• 👌 IMPROVE: Updated freemius to v2.9.0

2.0.2

• 🐛 FIX: Post types option issue with free version
• 🐛 FIX: @$dom->loadHTML issue if content are returning empty string
• 👌 IMPROVE: Updated freemius to v2.7.3

2.0.1

• 🐛 FIX: 500 Internal Server Error while saving options (Pro version)

2.0.0

• 👌 IMPROVE: Complete user interface revamp. Better experience with more features.
• 👌 IMPROVE: Image size removed from image name for alt tag in-case thumbnail is used.
• 👌 IMPROVE: Updated freemius to v2.6.2

1.4.7.2

• 🐛 FIX: Security issue
• 🐛 FIX: Issue with getting post id from global $post

1.4.7.1

• 🐛 FIX: Black List URLs issue (Pro version)

1.4.7

• 🐛 FIX: Issue with Beaver Builder
• 👌 IMPROVE: Updated freemius to v2.5.8
• 👌 IMPROVE: Disable Bialty on Homepage
• 👌 IMPROVE: Disable Bialty on Certain posts by adding URL's to Blacklist (Pro)