How to Bulk Update Image Alt Text in Shopify
To add Shopify alt text in bulk, export your products to CSV, fill in the Image Alt Text column for each image row and import the file with Overwrite products with matching handles selected. For large catalogs or ongoing updates, alt text apps can generate or apply alt text across your images automatically, and developers can update it through the Admin API.
Alt text describes an image for shoppers using screen readers and appears when an image fails to load. Writing it one image at a time quickly becomes impractical, so choosing the right bulk method saves hours while keeping descriptions accurate.
How to Add Alt Text in Bulk in Shopify
There are three main ways to update alt text for many images at once. This comparison shows how they differ:
| Method | How it works | Best for | Watch out for |
|---|---|---|---|
| Product CSV import | Edit the alt text column in a spreadsheet and re-import | Writing or templating alt text for many product images | Overwrite rules and possible image duplication, so test first |
| Alt text apps | Generate alt text with AI or templates and save it to your images | Large catalogs and new products added often | Credits, pricing and output that still needs review |
| Admin API | A script updates alt text on product media | Custom workflows or syncing from a product information system | Requires development work |
Update alt text with a product CSV
The CSV method is free and works for most stores. Each image in the export has its own row, so you can write alt text image by image:
- Go to Products > Export and export the products you want to update.
- Open the file in a spreadsheet and find the image URL column and the Image Alt Text column.
- Write alt text for each row that has an image URL, describing that specific image.
- Keep the Handle, image and alt text columns, and remove columns you aren’t changing.
- Import a few products first, then check that the alt text updated and no images were duplicated.
- Go to Products > Import, select Overwrite products with matching handles and import the full file.
Shopify allows alt text up to 512 characters but recommends 125 characters or fewer. Splitting large catalogs into smaller files also makes imports easier to check and less likely to time out.
Be careful with image URLs during re-imports. Shopify downloads images from CSV links during import, and its documentation notes that images linked from the Files area are redownloaded and duplicated, which is why a small test import matters.
Use an alt text app
Alt text apps handle the whole process inside Shopify, which suits stores with thousands of images or frequent new products. Many use AI to describe each image, often combined with product data such as the title, vendor, description and tags.
Typical features include bulk updates filtered by vendor, product type or tags, an option to skip images that already have alt text and automatic processing for new products. Some apps also support several languages, custom keywords and a history page where you can review and edit results.
Choose an app that saves alt text to your actual product images rather than adding it with a script on the storefront. Changes made only by an overlay don’t update your product data, so they may not carry over to other channels or survive uninstalling the app.
Use the Admin API
If you manage product content in another system, a developer can update image alt text through Shopify’s Admin API. This works well when alt text is written in a product information system and needs to sync to Shopify regularly.
API updates follow Shopify’s rate limits, so very large catalogs take time to process. Log which images were updated so you can retry any that fail.
Find Images Missing Alt Text
Before updating in bulk, it helps to know which images actually need alt text. In a product CSV export, filter the alt text column for blank cells on rows that have an image URL.
For images in your Files library, go to Content > Files and filter by alt text to find files without it. You can save this filter as a view and check it regularly as new files are uploaded.
Alt Text for Non-Product Images
Product photos aren’t the only images that need alt text. Banners, collection images and blog images also matter for accessibility, and they’re edited in different places:
- Files library. Open a file in Content > Files and add alt text to that image or video.
- Collection images. Open the collection and edit the alt text for its image.
- Blog and page images. Add alt text to featured images and to images inserted in the editor.
- Theme images. Check your theme’s image settings, since many theme images use the alt text saved on the file.
Files library alt text is edited one file at a time in the admin. For large libraries, an app that supports files or a script using the API can speed this up.
How to Write Good Alt Text at Scale
Bulk methods save time, but the descriptions still need to be useful. Keep these guidelines in mind when writing, templating or reviewing alt text:
- Describe what the image shows. Mention visible details such as color, material, angle or how the product is being used.
- Make each image’s alt text unique. Different angles and details deserve different descriptions.
- Keep it concise. Aim for 125 characters or fewer.
- Skip “image of” or “picture of.” Screen readers already announce that it’s an image.
- Use keywords naturally. Include relevant terms where they fit, without stuffing.
- Leave decorative images empty. Purely decorative images can use empty alt text so screen readers skip them.
Avoid filling every image with just the product title or variant name. This is a common shortcut in simple bulk tools, but it gives shoppers using screen readers little information about what each image actually shows.
Templates, AI or Manual: Which Should You Use?
Each approach trades speed against accuracy. This comparison helps you choose:
| Approach | Strengths | Limitations |
|---|---|---|
| Spreadsheet templates | Fast and free, using formulas built from product title, color or material | Repetitive, and can’t describe what each image shows |
| AI generation | Describes each image individually and scales to large catalogs | Costs credits and needs human review for accuracy and brand terms |
| Manual writing | Most accurate and on-brand | Time-consuming for large catalogs |
Many stores combine approaches, using AI or templates for a first draft and reviewing important products by hand. Your best sellers and hero images are a good place to start the review.
Common Bulk Alt Text Problems
Many issues come from import settings or the tools you use. Watch for these:
- Alt text didn’t update. The overwrite option wasn’t selected, or the alt text column wasn’t included in the file.
- Images were duplicated. Re-importing image links caused Shopify to download the images again.
- Alt text is identical everywhere. A simple template filled every image with the product title.
- Alt text disappeared after removing an app. The app added alt text with a storefront script instead of saving it to your images.
- Bulk processing stopped partway. The app ran out of credits or hit API rate limits.
- Text was cut off or rejected. Alt text exceeded the 512-character limit.
Conclusion
Managing Shopify alt text in bulk makes your store more accessible and saves hours of image-by-image editing. Whether you use a CSV import, an app or the API, reviewing the results keeps descriptions accurate and helpful for every shopper. We hope this guide helps you update Shopify alt text in bulk with confidence.
