Write Alt Text and Caption Together
Added 2026-11-02
One serves screen readers, the other serves readers — do not write the same sentence twice.
Here are images from my page, described in words. For each, write both alt text and a caption: 1) alt states what someone who cannot see the image needs to know, under 120 characters; 2) the caption adds the one thing a seeing reader would want, and can be more conversational; 3) do not repeat one in the other; 4) point out which image does not need a caption; 5) give a rule for when alt alone is enough and when both are warranted.
Site original
Chinese original
How to use
alt 和图注是两种读者，不是两种说法。
Try tweaking it
- Swap style words for measurable parameters: light, lens, material, composition.
- Ask for three variants of one prompt, then compare the differences.
What you should get
- A parameter sheet you can act on (light, lens, material, framing)
- Two or three alternatives with trade-offs
Common mistakes
- Stacking words like "premium, cinematic, 8K" — no two results match.
- Asking for a real brand or celebrity look and getting something close but unusable.
How to check the output
- Parameters are executable — ready to use in a tool or hand to a designer.
- It explains the trade-offs, not just the final look.
Where it works
- Good for: breaking vague "premium feel" into concrete light, material, lens and composition parameters.
- Watch out: for real brands, celebrities or third-party work, use equivalent descriptions to avoid infringement.