Image Alt-Text Generator

Upload an image or paste an image URL, then generate concise, descriptive alt text with OpenAI Vision. If anything fails, the tool falls back to a basic filename-based description.

⚠️ Keep your API key secret. This page runs entirely in your browser.

Step 1: Upload an image (or drag a file into the box below) …or provide an image URL

Use URL for preview

Drag & drop an image here, or use the controls above.

Step 2: Generate Alt Text Clear

Captioning provider OpenAI (Vision) No API (fallback heuristic)

Tip: Uploads are resized (max 1280px) to keep requests small. If you use a URL, OpenAI fetches it directly.

OpenAI API Key Model

Alt-text style Neutral, objective (recommended) Very brief (≤ 8 words) More detail (1–2 sentences) Decorative (empty alt) Step 3: Copy your alt text

Copy to Clipboard Keep it concise and meaningful.

WCAG quick tips:

• Describe essential content or function, not every detail.
• Avoid “image of …” — screen readers announce it.
• Decorative images should use empty alt (alt="").