Free tool
Product Image SEO Checker — File & Alt Text
Your product images and alt text, audited for search visibility — file quality, wording, and Google Lens readiness.
Test Your Product Image SEO
Upload image + alt text — instant audit & AI suggestion.
Click or drag a product image here
Paste the alt text you currently use. Leave it empty to check the image alone — AI can still write one for you.
About this tool
Upload a product image and the alt text you use for it. The checker audits both at once: the file itself (resolution, file size, format, filename, aspect ratio) and your alt text (missing, too short, too long, or starting with a redundant prefix). AI then reads the image and writes an optimized alt text you can copy straight into your listing — each AI suggestion costs 1 credit, and new accounts start with 5 free credits.
What this checker tests
- Alt text: present, descriptive, and under 125 characters
- Alt text doesn't repeat the filename or start with 'image of'
- File size under 300 KB for fast loading on mobile
- SEO-friendly format: JPEG, WebP, PNG, or AVIF
- Descriptive filename, not a generic IMG_ or DSC_ label
- Resolution of 1500×1500 or higher for reliable Lens matching
- Square 1:1 aspect ratio for gallery and shopping graph display
Image SEO checker FAQ
- Why does image alt text matter for SEO?
- Alt text is how search engines, Google Lens, and screen readers understand what an image shows. A descriptive alt text helps your product appear in image search and visual search results, and it's also an on-page ranking factor. Missing or generic alt text like 'image1.jpg' wastes one of the easiest wins on your product page.
- How do I write a good product image alt text?
- Describe what the image actually shows in plain language: product type, color, material, and key features, in that order of importance. Naturally include the product's main keyword but don't stuff. Keep it under 125 characters and never start with 'image of' or 'photo of'. Example: 'Red ceramic coffee mug with a matte finish on a white background'.
- Is this checker free?
- The rule-based file and alt text audit is completely free with no signup. The AI alt text suggestion costs 1 credit per use — new accounts start with 5 free credits, enough to try it 5 times. For full product page optimization — titles, bullets, descriptions, and AI-enhanced images — try the AI Product Page Optimizer.
Related resources
Other tools
Run it on a real listing
Install the Browser extension, sign in, and use 5 free credits on a product page you need to fix anyway.