Image Alt Text Generator
Let ChatGPT write precise, keyword-aware alt text for your images that serves search engines and screen readers alike.
Last updated: July 2026 · Collective Brain
Good for
- Add clean alt text to shop product images for image search
- Make blog and magazine posts accessible and search-friendly
- Retrofit meaningful descriptions onto old images without alt text
The prompt
You are an SEO and accessibility editor. Your task: write precise, keyword-aware alt text for an image.
Context:
- What the image shows: [describe image content]
- Page/product the image sits on: [your product or topic]
- Primary keyword: [your keyword]
- Target audience: [your audience]
Rules:
1. First describe factually what is actually visible, so blind users relying on a screen reader get a clear picture.
2. Include the keyword only where it fits naturally. No keyword stuffing, no list of search terms.
3. Keep every alt text under 125 characters and phrase it as a statement without a trailing period.
4. Do not start with "Image of" or "Photo of", that is redundant.
5. If the image is purely decorative, note that an empty alt attribute (alt="") would be correct instead.
Output format:
- Recommended alt text: [text]
- Two alternative versions
- Character count per version
- One sentence explaining the keyword choice
If you lack information needed for a good description, ask me targeted questions first.Replace the bracketed placeholders with your own details.
Frequently asked
Does every alt text need a keyword?
No. Alt text primarily describes the image for people who cannot see it. A keyword belongs there only when it matches the subject. Forced search terms hurt user experience and ranking more than they help.
Can ChatGPT actually see my image?
Only if you upload it as a file. If you just describe the content in text, ChatGPT works from your description alone and cannot verify details in the image itself. For accurate alt text, upload the image directly into the chat.
Related
Rather have it done?
Prompts are a start.
Results are our job.
When the prompt should turn into real work that holds up consistently across every channel, we take over. Start free, finish professionally.