內容簡介
Bialty 是一款 WordPress 的自動化 alt 文字外掛，能在前端 HTML 渲染時動態添加 alt 文字，無需對媒體庫進行重寫，適合希望廣泛覆蓋 alt 文字的網站擁有者。
【主要功能】
• 動態添加 alt 文字至圖片
• 支援 Yoast SEO、Rank Math 和 All in One SEO
• 可依據文章標題或產品標題生成 alt 文字
• 不會重寫媒體庫的元數據
• 可自訂每篇文章或產品的 alt 文字
外掛標籤
開發者團隊
② 後台搜尋「Bulk Auto Image Alt Text (Alt tag, Alt attribute) optimizer (image SEO)」→ 直接安裝（推薦）
原文外掛簡介
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, 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
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:
Bulk rewrite model
They rewrite alt text inside the Media Library or database.
AI vision model
They send images to an external API and generate descriptive text from image analysis.
Bialty follows a third model:
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
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:
Open the published page in a browser
Do not rely on the editor view
Clear all cache layers if caching is active
Inspect the element in the rendered page
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 6 languages:
English
French
Spanish
Portuguese
German
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.
