Alt Text for Shopify Product Images: The Complete 2026 Guide

Published 2026-07-12 · by the AltGenie team

Alt text is one of the most consistently overlooked levers in Shopify SEO. It costs nothing extra to get right, yet most stores either skip it entirely or fill it with keyword-stuffed gibberish that helps no one. This guide covers everything you need to know — what alt text actually does, how to write it well, and how to manage it at scale without losing your mind.

What Is Alt Text for Shopify Product Images?

Alt text (short for alternative text) is an HTML attribute on image tags that describes what the image shows. In a Shopify store, it looks like this in the source code:

<img src="red-running-shoe.jpg" alt="Men's red running shoe with white sole, side view">

It serves three distinct purposes:

• Accessibility: Screen readers read alt text aloud for visually impaired shoppers.
• SEO: Google uses alt text to understand image content since it cannot "see" photos the way humans do.
• Fallback display: If an image fails to load, the browser displays the alt text in its place.

All three matter, but for most merchants the SEO angle is the primary motivation — and it's a legitimate one.

Why Alt Text Matters for Shopify SEO in 2026

Google Images is a real traffic source. Shoppers searching for "navy linen blazer women" or "mid-century oak coffee table" regularly click through from image results to product pages. Without descriptive alt text, your images are essentially invisible to Google's crawlers.

Beyond image search, alt text reinforces the topical relevance of your product pages. A page about a leather wallet becomes more semantically clear when every product image is labelled accurately — which can modestly improve rankings in regular web search too.

Two other 2026-specific reasons to care:

• AI Overviews and visual search: Google's AI-generated answers increasingly pull product information from structured, well-described pages. Images with clear alt text are more likely to be understood and surfaced.
• Accessibility compliance: WCAG 2.1 guidelines require meaningful alt text for informative images. While enforcement varies by jurisdiction, accessibility lawsuits targeting e-commerce stores have become more common, and good alt text is a simple safeguard.

How to Write Good Alt Text: Practical Rules

Good alt text is specific, honest, and written for a human first. Here are the rules that actually matter:

Be descriptive but concise

Aim for 8–15 words in most cases. Describe what is visually present in the image — the product, its key attributes (colour, material, style), and the angle or context if relevant.

• Bad: "shoe"
• Bad: "buy cheap running shoes online free shipping best price"
• Good: "Women's grey trail running shoe with cushioned sole, top-down view"

Include your natural keyword — once

If the page targets "ceramic pour-over coffee dripper," work that phrase into the alt text naturally where it's accurate. Don't repeat it across every image; variation is fine and actually better.

Don't start with "Image of" or "Photo of"

Screen readers already announce it's an image. Starting with the actual description is cleaner and uses your character allowance better.

Treat variant images differently

If you have six colour variants of the same product, each alt text should reflect what's actually shown: "Linen tote bag in sage green" vs "Linen tote bag in terracotta." Identical alt text across all variants wastes the SEO opportunity.

Decorative images can be empty

If an image is purely decorative (a texture background, a divider graphic), an empty alt attribute (alt="") is correct. Screen readers then skip it entirely, which is the right behaviour.

Alt Text Formula by Product Type

A reliable formula: [Product type] + [Key descriptor(s)] + [Variant/colour/material] + [View/context if helpful]

How to Add and Edit Alt Text in Shopify

Shopify makes this straightforward, though the process is manual by default:

1. Go to Products in your Shopify admin.
2. Open a product and click on a product image.
3. A panel appears on the right with an "Alt text" field.
4. Type your description and click Save alt text.

You can also update alt text from the Files section under Content, though the product-level editor is usually faster for product images specifically.

The obvious problem: if you have hundreds or thousands of products, doing this manually is extremely time-consuming. This is where an app like AltGenie fills a real gap — it uses AI to generate accurate, SEO-friendly alt text for all your product images automatically, handles both English and Japanese, and applies to newly added products without any manual intervention.

Common Mistakes to Avoid

• Leaving alt text blank on product images: Shopify sometimes defaults to the filename (e.g., "DSC_04521.jpg"), which is useless. Always override it.
• Using the same alt text for all images of a product: Google sees this as thin or duplicate content at the image level.
• Keyword stuffing: Google's image quality guidelines explicitly penalise this. It also makes your store less accessible.
• Ignoring lifestyle images: That shot of the candle burning on a marble countertop still deserves alt text: "Soy wax vanilla candle burning on marble surface, atmospheric shot."
• Setting and forgetting: When you refresh product photography or add new SKUs, the alt text needs updating too.

Prioritising Your Alt Text Work

If you're starting from scratch on an existing store, don't try to do everything at once. Prioritise in this order:

1. Best-selling products — highest traffic potential, highest ROI.
2. Products ranking on page 2–3 in Google — alt text improvements can help push these over the line.
3. New arrivals — get these right from day one.
4. Everything else — work through remaining products systematically.

In many cases, merchants find that fixing alt text on their top 20–30 products alone produces a noticeable uptick in image search impressions within a few weeks (visible in Google Search Console under the "Search type: Image" filter).

Frequently Asked Questions

Does alt text directly affect my Shopify store's Google ranking?

Alt text is a confirmed ranking signal for Google Images. For standard web search, it contributes to a page's overall topical relevance but is one of many factors. It's unlikely to single-handedly move a page from position 20 to position 1, but it consistently helps — particularly for image-heavy stores in visual niches like fashion, home décor, and jewellery.

How long should alt text be for product images?

There is no hard character limit enforced by Google, but most SEO practitioners recommend keeping alt text under 125 characters. Screen readers typically truncate beyond this, and concise descriptions are generally more useful. Aim for 8–15 words as a practical guideline.

Should alt text include my brand name or store name?

Only if it's genuinely relevant — for example, if you're a brand whose name is part of the product identity (e.g., "Nike Air Max 90 in white"). Adding your store name to every image's alt text for SEO purposes is considered keyword stuffing and can do more harm than good.

What's the difference between alt text and image file names in Shopify?

Both matter, but serve slightly different purposes. The image file name (e.g., "womens-red-wool-coat.jpg") is read by crawlers before the image loads and can reinforce keyword relevance. Alt text is read during and after rendering and is the primary signal for image search and accessibility. When possible, optimise both — rename images descriptively before uploading, then add accurate alt text in the product editor.