Email Alt Text Checker

Why Alt Text Matters in Email

Alt text (alternative text) serves two critical purposes in email marketing. First, it makes your email accessible to visually impaired subscribers who use screen readers — these tools read the alt text aloud to describe the image. Second, when images are blocked by email clients (which is still common), the alt text is displayed in place of the image, providing context for what the subscriber cannot see.

Best practices for email alt text include: describing the image accurately and concisely (under 125 characters), including call-to-action text for button images, avoiding phrases like "image of" or "picture of," and ensuring decorative images have empty alt text (alt="") so screen readers skip them.

Use this checker alongside our Email Readability Score and Preheader Optimizer to ensure your email content is optimised for all readers. For campaign performance tracking, see our Open Rate Calculator.