AI Alt Text Generator for Webflow

AltTextLab generates accurate, SEO-optimized alt text for every image on your Webflow site, right inside the Designer. Unlike generic captioning tools, it reads each image in the context of your page, so descriptions sound like something a human SEO or accessibility specialist would write. Generate one image at a time, or scan a whole page to bulk-generate alt text.

What makes AltTextLab different

Context-aware, not just captioning. It reads the page around each image instead of labeling pixels in isolation, so descriptions are relevant, not generic.

You control the SEO. Add target keywords, and they appear naturally in the alt text, so the phrases you care about show up in image search.

Accessibility done right. Mark decorative images as decorative so screen readers skip them, instead of forcing a description onto images that carry no meaning. Most tools can't tell the difference.

You keep the final say. Review and edit any description in place before it's saved, and choose whether it applies to one page or everywhere the image is used.

Key features

One-click alt text generation

Select any image in the Designer and click Generate. AltTextLab reads the image in context and writes an accurate, relevant description straight to the image element's alt attribute.

Bulk generation

Generate or update alt text for many images, or the entire page, in one pass. Open the Page images tab, select the images you want, and use Bulk actions. Built for image-heavy pages.

SEO keyword control

Specify target keywords, and they are woven naturally into the description, not stuffed or appended, so the output reads well for both people and search engines.

See and manage all your alt text in one place

AltTextLab scans the page and lists every image with its current alt text, so you can review the whole page at a glance, spot what's missing or weak, and fix it, by editing it yourself or generating it with AI. One screen instead of one click per image.

Decorative image support

Flag purely decorative images so screen readers skip them, exactly what WCAG expects for images that carry no meaning.

Customizable writing styles

Choose between descriptive, neutral, minimal, or matter-of-fact tones. Set a preferred style per project, and every generated description follows it.

Audit-ready output

Descriptions are written to WCAG 2.1 AA standards for length, natural language, and meaningful context, so your Webflow site is ready for ADA, EAA, and Section 508 accessibility reviews.

130+ languages

Generate alt text in over 130 languages directly from the app settings. Useful for Webflow sites serving multiple locales or international audiences.

Works across all your sites

One account covers any number of domains with no per-site fees, and credits are pooled across projects. Practical for agencies and freelancers running alt text across multiple client sites.

Privacy-first and GDPR-aligned

Images processed by URL are never stored on our servers. Only the generated alt text is saved to your account for reference. No data is ever used to train AI models, and no visitor or site data is ever accessed.

Supports JPG, PNG, SVG, AVIF, and WebP.

How to add alt text in Webflow with AltTextLab

1. Install AltTextLab by clicking the Install App button in the top-right corner of this page.
2. Open the app inside the Webflow Designer and connect your account with your API key in Settings. While you're there, set your default language and writing style once, and every description follows them.
3. On the Selected image tab, click any image on the canvas, add keywords for it if you want to steer the description, and click Generate alt text.
4. Or open the Page images tab, scan the page to list every image, and generate, edit, or mark images as decorative, one by one or with Bulk actions. You can add keywords to any image here using its keyword icon.
5. Edit any description in place and click Update to apply it. Choose whether it applies to this page only or to all pages using the image.

Who it's for

1. Web designers automating accessibility on the sites they build
2. Agencies and freelancers keeping every client site compliant and discoverable
3. Content and marketing teams maintaining media-rich pages
4. SEO specialists optimizing Webflow sites for image search rankings and AI visibility
5. Anyone looking for a reliable alt text generator without leaving Webflow

Start free

Start with 25 free credits per month. Save hours of manual work, improve your SEO, and make your Webflow site accessible to everyone.