Image SEO fundamentals beyond alt text: file names, captions, context and EXIF data on Wix

Most Wix site owners believe image SEO begins and ends with alt text. In reality, alt text is just one of at least eight signals Google uses to understand and rank images. File names, surrounding text context, captions, EXIF metadata, image sitemaps, structured data, page title, and URL all contribute to how Google interprets and ranks your images. This lesson covers every factor comprehensively, with specific implementation instructions for Wix websites.

Signal 1: File Names Matter More Than Most Wix Users Realise

Google has explicitly stated that image file names are used as a ranking signal for image search. A file named wix-seo-audit-checklist-2026.jpg tells Google exactly what the image contains, while IMG_3847.jpg tells Google nothing. Despite this, the vast majority of images uploaded to Wix sites retain their default camera file names.

Image file naming best practices for Wix

• Rename every image BEFORE uploading to Wix, this is the only opportunity to set the file name
• Use lowercase letters and hyphens to separate words, never underscores or spaces
• Include the primary keyword the image relates to naturally in the file name
• Be descriptive: handmade-oak-dining-table-6-seater.jpg is better than dining-table.jpg
• Include location keywords for local businesses: seo-agency-manchester-office.jpg
• Avoid keyword stuffing: one to three keywords per file name is sufficient
• Keep file names under 60 characters for readability and URL compatibility
• Develop a consistent naming convention and document it in your SOP for anyone who uploads images

Signal 2: Alt Text Done Properly

Alt text (alternative text) is the most well-known image SEO signal, but it is frequently done poorly. Good alt text serves two purposes simultaneously: it describes the image for screen readers (accessibility) and it tells search engines what the image contains (SEO). The best alt text accomplishes both in a single natural sentence.

• Write alt text as a natural description of what the image shows, as if describing it to someone who cannot see it
• Include the primary keyword naturally if it accurately describes the image, do not force keywords into unrelated images
• Keep alt text between 8 and 25 words, long enough to be descriptive but not so long it becomes a keyword dump
• Never start with "image of" or "picture of" as screen readers already announce it as an image
• For product images: include the product name, key features, colour, and any distinguishing characteristics
• For infographics: describe the main takeaway or topic of the infographic rather than trying to describe every detail
• For decorative images that add no informational value, use empty alt text (alt="") so screen readers skip them

Signal 3: Captions and Surrounding Text Context

Google uses the text immediately surrounding an image as a strong contextual signal for understanding what the image is about. This includes image captions, the paragraph directly above and below the image, and the heading under which the image appears. Captions are particularly powerful because users read captions more than any other text on a page, and Google knows this.

Optimising surrounding context on Wix

• Place every important image near text content that is topically relevant to the image
• Add a descriptive caption to every significant image using the Wix image caption feature
• Ensure the heading above the image section relates to the image topic
• Include relevant keywords in the paragraph immediately preceding or following the image
• Do not isolate images from text, an image surrounded by empty space has weaker contextual signals
• For gallery pages, add descriptive text between image groups rather than presenting images with no text context

Signal 4: EXIF Metadata for Local and Product Image SEO

EXIF (Exchangeable Image File Format) metadata is data embedded in image files by cameras and editing software. It can include location coordinates, camera settings, date taken, copyright information, and more. Google has confirmed that it reads EXIF data from images, and for local SEO in particular, location data embedded in images can help associate your content with a specific geographic area.

• For local businesses, ensure location EXIF data (GPS coordinates) is embedded in photos of your premises, products, or service area
• Use EXIF editing tools like ExifTool or online EXIF editors to add or modify metadata before uploading to Wix
• Add copyright information to your EXIF data to establish image ownership
• Include descriptive keywords in the EXIF title and description fields
• Be aware that Wix may strip some EXIF data during image processing, test by downloading your uploaded image and checking the EXIF data
• For product images, include the product name in the EXIF title field

Signal 5: Image Sitemap Optimisation on Wix

Wix automatically includes images in your XML sitemap, but understanding how this works helps you ensure all your important images are discoverable by Google. The image sitemap tells Google which images exist on each page, making it easier for Googlebot to find and index them.

Verifying and optimising your Wix image sitemap

• Visit yourdomain.com/sitemap.xml to view your Wix sitemap
• Check that important image-heavy pages are listed in the sitemap
• Verify that image elements appear within the page entries in the sitemap
• Submit or resubmit your sitemap in Google Search Console after adding new image content
• Check Google Search Console Coverage report for any image indexing issues

Signals 6-8: Page Title, URL and Structured Data

Google also uses the page title, URL and any structured data on the page to understand image context. An image on a page titled "Handmade Oak Dining Tables | Custom Furniture" at the URL /handmade-oak-dining-tables is much more likely to rank for oak dining table image searches than the same image on a page with a generic title and URL.

• Ensure page titles accurately reflect the image content on the page
• Use keyword-optimised URLs for pages that contain important images
• Implement ImageObject schema markup for key images on your Wix site
• Include image properties in your Product schema for eCommerce product images
• Use WebPage schema that references the primary image on each page

Complete How-To Guide: The Full Image SEO Audit for Your Wix Site

Audit and optimise every image on your Wix site

• Create an image audit spreadsheet with columns: Page URL, Image Description, Current File Name, Optimised File Name, Current Alt Text, Optimised Alt Text, Has Caption (Y/N), Has Surrounding Context (Y/N), Image Size (KB), Format
• Crawl your Wix site with Screaming Frog to extract all image URLs, file names and alt text automatically
• Identify all images with default camera file names (IMG_, DSC_, Screenshot_) and plan to replace them with properly named versions
• Identify all images with missing or generic alt text and write optimised alt text for each
• For each important image without a caption, write and add a descriptive caption in the Wix editor
• Check that every important image is surrounded by relevant text content, not isolated in empty sections
• For local business images, add location EXIF data before re-uploading to Wix
• Verify your image sitemap is working by checking yourdomain.com/sitemap.xml
• Implement ImageObject schema for your most important images using Wix Custom Code
• Compress all images over 200KB using Squoosh before re-uploading to Wix
• Convert images to WebP format where possible for better compression and faster loading
• Resubmit your sitemap in Google Search Console after completing all image optimisations