Heads-up
Many email clients block remote images by default until the reader opts in. That's a client behaviour, not a hosting issue — any image host has the same caveat.
Step by step
1. Upload the hero image
Drop it at /upload. Anonymous uploads work, but signing in lets you keep a library of newsletter assets you can reuse.
2. Paste the URL into your newsletter editor
Substack, Buttondown, Mailchimp, and ConvertKit all accept external image URLs in their editors and inline an <img src=…> for you.
3. Pre-size for retina
Generate a 2× width variant for retina screens and let the email client downscale.
Pre-sized retina variant https://i.swiftimg.com/abc123.png?w=1200&fm=webp&sig=...
Email newsletters — FAQ
Does swiftimg work as an SMTP / sending provider?
No — it only hosts the images. Use your existing newsletter tool to send; just embed the swiftimg URL.
Will the link still work in archived issues?
Yes. Uploads don't expire, so a newsletter you sent years ago keeps rendering its images.
Should I use WebP in emails?
WebP is supported in Apple Mail, Gmail, and modern Outlook; older clients fall back. If you want maximum reach, serve PNG/JPEG and let swiftimg deliver from its global cache.
See also
Image hosting for LinkedIn
Host images on swiftimg and embed them in LinkedIn articles via Markdown or as a link with an OG card. Permanent URL, globally cached, no expiry.
Image hosting for Ghost
Host Ghost post images on swiftimg. Stable URLs, automatic WebP, and on-the-fly resize — without configuring an S3 + CloudFront pipeline.
swiftimg vs Cloudinary
A simpler, far cheaper Cloudinary alternative for image & GIF hosting and on-the-fly transforms.
Ready to host your Email newsletters images?
Start free, then unlock the full API, transforms, signed URLs, and a custom domain on the Developer plan.