SEO6 min read·Updated

Does WebP Affect Accessibility?

Screen readers do not 'see' WebP vs JPEG. They hear alt text. WebP can even help users on slow connections. The risk is a sloppy replace that strips alt or uses a tiny mushy file for important content.

Codec ≠ a11y

Keep contrast in the photo, do not smash quality to 40%, and keep text that matters as real HTML — not inside a compressed screenshot.

Why it matters

  • Low-vision users zoom; mushy 50% WebP fails them.
  • Missing alt fails WCAG regardless of format.
  • Faster loads help motor and cognitive users who wait on each page.

How to do it

  1. Convert at quality that keeps faces and UI text readable (80–90%).
  2. Preserve alt during replace.
  3. Prefer HTML text over text-in-image.
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Put it into practice

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Frequently asked questions

They announce the alt (or filename if alt is missing). Format is irrelevant.

Only if you over-compress and flatten the image. That is a quality setting issue.

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