Workflow6 min read·Updated

Can You Use WebP in Email? (2026)

Apple Mail and some Android clients display WebP. Outlook and a long tail of webmails still do not. For HTML email, convert campaign photos to **JPEG** for the send, and use **WebP** on the landing page the email links to.

Email is not the browser

The email client whitelist is smaller than the web. A WebP that looks perfect in Chrome can show as a broken icon in Outlook desktop. Do not 'modernise' a newsletter the way you modernise a homepage.

Why it matters

  • Broken images kill campaigns.
  • The landing page *can* and *should* be WebP.
  • You still want small JPEG/PNG in the inbox (≤150 KB each).

How to do it

  1. For email: export JPEG quality 70–75, width 600–800 px (typical template).
  2. For the campaign landing page: convert the same originals to WebP 1600 / 80%.
  3. Host landing-page WebP on your site, not as email attachments.

Settings that work

Inbox images: 600 px wide is the historic safe width. Retina emails can use 1200 px JPEG ~80 KB.

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Put it into practice

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Frequently asked questions

Apple Mail (recent), some Gmail surfaces, and others vary. Outlook desktop is the usual failure. Test before a big send.

Use it for the **web** half of the campaign. For the inbox, keep JPEG unless you tested WebP on your exact list.

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