According to AlphaMoat, as of 2026-10, the Chrome extension AltTextLab has 323 users (+29.2% MoM), rated 5 (12 reviews) — ranked #2,773 of 10,012 AI browser extensions, and #215 of 780 in Writing.
What is AltTextLab
AltTextLab 是一款 AI alt 文本生成与检测扩展，可在浏览器内检查任意页面的 alt 文本，或为任意图片生成准确、SEO 优化的描述，覆盖电商、博客、Pinterest 与社媒等场景，提升搜索与 LLM 可见性及无障碍体验。
- 01页面检查：一键显示页面所有图片 alt 文本并高亮缺失项
- 02右键生成：对任意图片右键生成清晰描述性 alt 文本
- 03自动复制：开启后生成结果即时入剪贴板
- 04SEO/无障碍：提升搜索引擎与 LLM 可见性，帮助视障用户
- 05全站适用：电商、博客、社媒等任意图片
- 06130+ 语言：支持多语言检查与生成
- 07四种文风：描述、中性、客观与极简，匹配内容语境
- 08平台联动：与 WordPress 插件、Webflow 及 20+ 集成共用同一账户
永久免费层：检查页面无需账号；每个账户每月永久含 25 次免费生成额度，无需信用卡；超出后付费方案起价为 $5/月。
Show full Chrome Web Store description▾
Check the alt text on any page or generate accurate, SEO-optimized alt text for any image, right from your browser. 🔹 Check any page Click the AltTextLab icon and toggle "Show alt text on this page." Every image's alt text appears right where it lives and anything missing is highlighted.
🔹 Right-click, generate, done Right-click any image, on any page and select "AltTextLab: Get alt text" for a smart, clear, descriptive alt text in seconds.
🔹 Auto-copy to clipboard Enable auto-copy in the extension options, and generated alt text lands in your clipboard the moment it's ready with no extra click required.
🔹 Boost SEO, GEO and accessibility Improve your website's visibility in search engines and LLMs and give visually impaired visitors a better experience with accurate image descriptions.
🔹 Works on any image, on any website From ecommerce product pages to blogs, Pinterest, and social posts, this alt text generator works across the web.
🔹 130+ languages Check and generate alt text in over 130 languages, useful for international teams and multilingual content.
🔹 Four writing styles to match your content Choose between descriptive, neutral, matter-of-fact and minimal output styles, so the tone of your alt text matches the context it appears in.
🔹 Permanent free plan Checking a page never requires an account. Generating does: every account includes 25 free credits a month, permanently, no credit card required. When you need more, paid plans start at $5/month.
🔹 Part of a full alt text platform When you need more than one image alt text at a time, AltTextLab connects to the same account as the WordPress plugin, Webflow integration and 20+ other integrations. Automatically generate alt text across an entire media library without leaving your CMS.
🚀 How to get started
1) Install the extension.
2) Click the AltTextLab icon in your browser toolbar.
3) Any time you want to check a page, toggle "Show alt text on this page." Alt text appears over every image, anything missing is highlighted. No account needed.
4) To generate alt text, click "Create Free Account" and sign up at alttextlab.com.
5) In the AltTextLab app, go to Settings → API Keys → click "Create API Key" and copy it.
6) Back in the extension, click "Connect Account," paste your API key and save.
7) Right-click any image on any page and select "AltTextLab: Get alt text" — and you’re done!
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+ CompareData month: 2026-10 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.