Updated: 23 October 2026

Write helpful image alt text

This prompt writes alt text for images on a page about your topic, saying which images are decorative and need empty alt text and adding a longer description where needed.

text-alt-text-writer — chatgpt — 49 words

Write alt text for these images on a page about [TOPIC]:

[DESCRIBE EACH IMAGE AND ITS PURPOSE]

For each give a short alt text under 125 characters, say whether the image is decorative and needs empty alt text, and add a longer description for any complex chart or diagram.

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Describe what the image means on the page, not every visual detail.

Get a better result

What you will get

A short alt text under 125 characters for each image, a note on which images are decorative and need empty alt text, and a longer description for any complex chart or diagram.

Common mistake

Alt texts begin with “Image of” or “Picture of”.

Fix: Add “do not start with image of or picture of; start with the content”. Screen readers already announce an image as an image.

Also watch for

Every image is described in every visual detail. Use the tip and describe what the image means on the page. Say what each image is for in the list you give.
A chart gets a one-line description that misses the point. Say “for charts, state the main trend and the key numbers in 2 or 3 sentences”, and paste the data if you have it.

Try a variation: product page

Change the topic to “a product page for a kettle” and add “include the colour and the one feature the shopper cares about, in plain words”. Leave marketing slogans out of alt text.

Still not right? Reply with this

Make it shorter and more specific to my situation. If you need more detail, ask me up to 3 questions first.