Desktop email layouts
Choose familiar 600px layouts, wider 640px templates or 660px email builder content.
Optimise email images for every inbox
Prepare sharp, lightweight campaign images for desktop, mobile and high-density screens. Choose a practical email layout, preview light and dark backgrounds, and download compatible JPG or PNG files without uploading your images.
20+campaign presets2xRetina-ready output0image uploads
Built for real email campaigns
Prepare images for every inbox
No upload
Drop your email images hereImages are resized and optimised automatically
JPEG, PNG, WebP or SVG · Up to 25 images · 25MB per image
Original size0 B
Email outputPending
Size changePending
Check before sending
Preview your email image
This checks your image on light and dark backgrounds. Individual email applications can still apply their own colour changes.
Ready for your template
Email-friendly image HTML
Upload the downloaded image to your email platform, then replace the example image address.
Desktop and mobile Useful campaign dimensionsRetina-ready 1x, 1.5x and 2x outputPrivate Images remain on your device
Designed for real campaigns
One image workflow for desktop and mobile
Prepare newsletters, promotions, brand graphics and product images with practical email delivery in mind.
Mobile-first images
Prepare assets for 320px, 360px, 375px, 390px and 414px mobile layouts.
High-density displays
Generate 1x, 1.5x or 2x image files while keeping the intended email display width.
Light and dark previews
Inspect the finished image on light and dark surfaces before adding it to your campaign.
Campaign images in three steps
Choose, optimise and add to your email
Each image is resized and encoded automatically inside the current browser tab.
Choose the email placement
Select a desktop, mobile, logo, product or custom preset and choose the output density.
Add your campaign images
Drop up to 25 JPEG, PNG, WebP or SVG files. Every image is processed immediately.
Preview and download
Check light and dark backgrounds, download your results and copy practical email image HTML.
Built for email compatibility
Use JPG for photographs and PNG for graphics
Email-safe output avoids relying on newer formats that are not consistently supported in older email applications.
Automatic email output
Photographs become JPG while PNG graphics and SVG logos create compatible PNG files.
JPG campaign photographs
Progressive MozJPEG creates efficient photographs with broad email application support.
PNG logos and artwork
Lossless PNG is suitable for brand graphics, readable text and transparent artwork.
Safe vector logo input
SVG files are checked and rasterised to email-friendly JPG or PNG output.
Sharp where it matters
Choose the right pixel density without stretching
A 600px email image can be delivered as a 1200px file and displayed at 600px. This 2x approach improves clarity on high-density desktop and mobile screens without changing the intended layout.
Fill and crop covers the selected frame while preserving the source proportions. Fit whole image keeps every part of the artwork visible and places it on your chosen background colour.
A light or dark preview is a helpful visual check, not a complete simulation of Gmail, Apple Mail or Outlook. Email applications and recipient settings can still change surrounding colours.
Current optimiser safeguards
✓Desktop and mobile display dimensions remain explicit.
✓1x, 1.5x and 2x output sizes are calculated correctly.
✓Photographs and graphics use compatible email formats.
✓A source image is never stretched out of proportion.
✓Small sources are flagged when a larger output is requested.
Made for email marketers
Prepare every important campaign image
Create practical assets for newsletters, automated flows, promotions and customer communications.
Newsletter hero images
Create 600px or 660px full-width images for editorial newsletters and announcements.
Promotional banners
Build lightweight campaign headers and seasonal offer graphics.
Mobile email content
Prepare narrower image variants for mobile-first email designs.
Product grids
Create consistent two-column and three-column product or category images.
Email logos and signatures
Export sharp brand marks and smaller graphics that remain clear at display size.
Outlook-friendly templates
Copy image HTML with an explicit width and responsive inline styles.
Keep campaign assets private
Your email images stay in your browser
Campaign photographs, product artwork and brand assets are decoded, resized and encoded locally. Image data and filenames are not sent to an ImageOptimise image-processing server.
- No registration or image upload is required.
- Each browser tab keeps its own separate batch.
- Other users and devices cannot access your campaign assets.
- Clear the batch or close the tab to release the temporary session.
Email image questions
Clear answers for email marketing teams
Useful guidance on campaign dimensions, image formats, Retina output and inbox compatibility.
What width should an email image be?＋
There is no single universal width. Many established email templates use a 600px content column, wider layouts can use 640px, and the newer Mailchimp email builder recommends images that are at least 660px wide.
What image sizes work for mobile email?＋
Common mobile email layouts include 320px, 360px, 375px, 390px and 414px. A responsive desktop image can also scale down inside a mobile layout when its email HTML is configured correctly.
What does 2x Retina output mean?＋
The downloaded file has twice the pixel width and height of its intended display size. For example, an image shown at 600 by 300 pixels can be delivered as a 1200 by 600 pixel file for sharper high-density screens.
Is Retina image optimisation only for iPhones?＋
No. High-density displays exist across Apple, Android and desktop devices. The 1x, 1.5x and 2x options describe image pixel density rather than one operating system.
Which image format is safest for email?＋
JPG is a practical choice for photographs and PNG is a practical choice for logos, graphics and transparency. WebP and SVG can be uploaded as source artwork, but this tool creates JPG or PNG because email application support is more consistent.
Will this fix every Outlook or dark mode issue?＋
No tool can guarantee identical appearance in every email application. The preview helps you check light and dark backgrounds, while the optional image HTML includes an explicit display width and responsive inline styles that are useful for many Outlook and mobile workflows.
Does Gmail clip emails because an image is larger than 102KB?＋
No. Gmail clipping is associated with the size of the email HTML itself, not the file size of separately hosted images. Smaller image files still matter because they can improve loading speed and reduce data usage.
Can I upload an SVG company logo?＋
Yes. SVG files are sanitised and converted into email-friendly PNG or JPG artwork at the selected display size and pixel density.
Can I optimise several email images together?＋
Yes. Process up to 25 images in one batch, with a maximum source size of 25MB per image. Download each result separately or collect the finished images in one ZIP file.
Does this tool support animated GIF files?＋
Not in the current release. Animated GIF preparation needs a separate workflow to preserve animation and account for older email applications that display only the first frame.
Ready for your next send
Optimise email images
Prepare your next email campaign image
Choose a practical layout and optimise privately inside your browser.