Digital Hub Lab
Image SEO & Accessibility Checker
Review an image’s filename, dimensions, file size and alternative text before uploading it to a website.
Check an image locally before uploading it. The tool reviews its technical details alongside the proposed filename and alternative text without sending the file anywhere.
Preparing the interactive tool…
How to use this tool
- Choose an image stored on your device.
- Review or edit the proposed filename.
- Write alternative text for the image’s purpose in context.
- Use the review notes to improve size, naming or description before uploading.
Understanding the result
Alternative text should replace the useful information supplied by an image. Decorative images normally need empty alt text, while informative images need concise wording that fits their context.
Practical guidance
Avoid camera filenames, keyword lists and descriptions that begin with ‘image of’ unless that wording is genuinely useful. Resize and compress large files before placing them on a page.
Related guides
Learn more about the ideas behind this tool: