Product Image Alt Text Checklist: 9 Things to Check

Product image alt text should tell a shopper what a photo shows when the photo is unavailable. It also gives search engines useful context. For an online store, the best description is specific to that one image, not a copied product title.

This checklist uses a cobalt blue insulated water bottle as a sample product made for this article. The same product needs different words in a counter photo, a clean catalog shot, and a lifestyle scene. That difference is where most catalog alt text goes wrong.

In this checklist

• Start with the image purpose
• Describe the product a shopper needs to identify
• Keep useful context
• Leave out filler and keyword lists
• Build a review workflow for the catalog

1. Product image alt text starts with the purpose of the image

Before writing a description, ask what the image adds to the page. A product photo gives a shopper visual evidence. A close-up may show texture or a fastener. A lifestyle photo may explain scale or use. If the image repeats information already available in text and adds no useful detail, it may be decorative instead.

That distinction matters for accessibility. A screen reader should not announce the same phrase five times because a product gallery has five near-identical angles. Keep the first image descriptive, then make each additional description earn its place by naming what changes.

Google recommends standard image elements with a source URL so it can discover images. Its image SEO guidance also makes clear that page context, image quality, and crawlable image markup all matter. Product image alt text helps, but it cannot repair a weak product page or a hidden image.

2. Name the product and the visible details that identify it

Start with the item type. Then add the details that help distinguish it: color, material, pattern, size, style, or a visible feature. Do not write what the product might do unless the photo proves it. A bottle beside a towel does not prove it is leakproof, dishwasher safe, or insulated for a set number of hours.

For the sample product, “blue water bottle” is usable but incomplete. “Cobalt blue insulated water bottle with a silver screw cap” gives a shopper a clearer picture. The phrase names only details visible in the image.

3. Write product image alt text for the photo, not the SKU

A product title can be a useful starting point, but it is rarely the finished description. Titles often include a brand, a collection name, a color, and a capacity. An image description needs to say what a person would miss if the photo did not load.

The weak examples are not wrong because they are short. They fail because they leave out the visual information. They also read like a product feed field instead of a description for a person.

4. Keep the context when it changes the meaning

Context is worth adding when it helps a shopper understand use, scale, or the difference between images. The kitchen counter image shows a casual home setting. The park-bench image suggests a carry-along use case. The clean studio image removes context on purpose so the product shape and color are easy to judge.

Do not describe every prop when it does not matter. “Cobalt blue insulated water bottle on a kitchen counter” may be enough for a smaller gallery. Add the folded towel and wooden spoon only when those details appear in the image and help distinguish it from another product photo.

5. Skip phrases that do not add information

Cut “image of,” “picture of,” and “product photo of” in most cases. A screen reader already announces the image element. Use that space for information instead. Also skip sales language such as “beautiful,” “premium,” or “best” unless the image itself contains a fact that supports the claim.

Keyword stuffing creates a worse experience. “Water bottle, blue water bottle, insulated bottle, sports bottle” tells a shopper less than one complete sentence. Shopify advises store owners to use concise, specific descriptions and to include keywords only when they accurately describe the image. Its image alt text guide is a useful check when a store team needs examples for product, lifestyle, and functional images.

6. Use an empty alt attribute for purely decorative repeats

Not every image needs a spoken description. A background flourish, a repeated divider, or an icon that duplicates nearby text can use an empty alt attribute. That tells assistive technology to skip it instead of reading a meaningless filename.

Be careful with product galleries. A second angle is usually not decorative if it reveals a handle, a closure, a texture, or the back of the item. Product image alt text should change with the visual detail. When two photos are truly identical, keep one useful description and avoid repetition elsewhere on the page.

7. Match the description to the page language

Translate the meaning, not a list of keywords. A shopper in another market should hear the same product, color, and visible context in natural local language. Check local naming for product types, measurements, and colors before publishing. A literal translation can make a page sound strange or change the meaning of a material.

Keep the product data behind the translation consistent. If one market calls the item a flask and another calls it a bottle, the visible item, product title, and attributes still need to refer to the same catalog record. That consistency matters when stores publish the same listing to several channels.

8. Review alt text with the image open, not from a spreadsheet alone

Bulk editing is fast, but it invites copy-and-paste errors. Open the image beside the proposed description. Ask two simple questions: Could a shopper identify the product from this sentence? Does the sentence mention only what this image shows? If either answer is no, revise it.

Also check the rendered product page on a phone. A strong image description does not replace a clear product title, a readable price, or useful specifications. The page needs all of them. The guide to white-background product photos can help teams improve the main catalog view before they write descriptions for it.

9. Make product image alt text part of the publishing checklist

Store the description with the image, not in a separate note that will be lost after launch. For each new product, make the workflow simple: approve the image, write the description, check it against the visible photo, publish it with the product record, then review it after any image replacement.

• Write one distinct description for each informative product image.
• Name the product first, then the visible details that matter.
• Keep context when it shows use, scale, or a different product angle.
• Remove filler, duplicated phrases, and keyword strings.
• Use empty alt text only for images that add no information.
• Review translations against the image, not only the source sentence.

Product image alt text is a small field with a real job. It helps a product page keep meaning when images fail and gives search engines a clearer signal about what the page shows. Teams that need to apply the same checks across a large catalog can use Agerta to prepare product images, descriptions, and listing updates for review under the rules they set.

For more page-level checks, browse the E-commerce SEO category and compare image work with the right product description length for the purchase decision.