Image Alt Text Generator

Generate descriptive alt text for images using AI. Runs locally in your browser — nothing is uploaded.

Drop an image here

or click to select a file

PNG, JPG, WebP

How to use

  1. Drop an image or click to select one — PNG, JPG, or WebP.
  2. Wait for the AI model to generate a description (first use downloads ~50 MB, then cached).
  3. Edit the alt text if needed, then copy it for your HTML or Markdown.

Frequently asked questions

How does the alt text generator work?

It uses a vision-language AI model (ViT-GPT2) that runs in your browser. It analyzes the image and generates a description. The model (~50 MB) is downloaded once and cached.

Is my image uploaded to a server?

No. The AI model runs entirely in your browser using WebAssembly. Your images never leave your device.

What makes good alt text?

Good alt text is specific, concise (under 125 characters), describes content and purpose, and avoids starting with "image of".

Can I edit the generated alt text?

Yes. The generated text appears in an editable box. Refine it, then copy for your HTML or Markdown.

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