Resize Images for Email
Get the perfect email image dimensions — resize for newsletters, attachments, and email marketing. Works with Gmail, Outlook, Mailchimp, and more. Free, no account needed.
Resize Your Email Images Now
Open PicsSizer's free Image Resizer and set the perfect email dimensions in seconds.
Perfect for Every Email Type
Email Newsletters
- Hero banner images
- Article thumbnail photos
- Product showcases
- Footer images & logos
Email Marketing
- Mailchimp campaigns
- Klaviyo email templates
- Constant Contact layouts
- HubSpot email assets
Attachments & Business
- Photo attachments
- Portfolio images
- Invoice & report graphics
- Client presentation assets
How to Resize Images for Email
Open the Image Resizer
Click the button below to open PicsSizer's free Image Resizer. No account needed — works directly in your browser.
Enter Email Dimensions
Set the width to 600px for newsletters, or choose a custom size for attachments. Keep image file size under 1MB for reliable email delivery.
Download & Send
Download your email-ready image and attach it to your email or insert it into your email marketing template.
Email Image Size Guide: Dimensions That Work
Email clients like Outlook, Gmail, and Apple Mail render images differently depending on the screen size and client settings. Using the wrong image dimensions leads to horizontal scrollbars, broken layouts, and images that appear too large or too small for mobile readers. Resizing images before inserting them into emails ensures a consistent, professional appearance across all devices and email clients.
Why Image Size Matters in Emails
Most desktop email clients display content in a container 600px wide. Images wider than 600px overflow this container on older clients, creating horizontal scrollbars and broken layouts. On mobile, email clients scale images down, but oversized images still cause slower load times and can trigger spam filters due to large attachment sizes. Keeping images under 1MB reduces delivery failures and load times.
Recommended Email Image Dimensions
Email newsletter header/hero: 600px wide (height varies). Inline content image: 600px or 300px wide. Email thumbnail: 200×200px to 300×200px. Email footer logo: 200px wide or less. Email signature image: 100–200px wide. For mobile-first emails, use 320px wide images as a safe minimum. Always keep total email image size under 1MB combined for reliable delivery.
Best Practices for Email Images
Save images as JPEG for photos (quality 80–85%) and PNG for logos or graphics with transparency. Always add alt text to email images in case they are blocked by the email client. Use a white or matching background color so images blend smoothly with your template even if they load slowly. Test your email in both light and dark mode clients.
Getting email image dimensions right is a small step that makes a big difference in how professional your emails look across all devices. Resize your email images for free with PicsSizer — no account required, no uploads, and completely private. Your images are processed entirely in your browser.
More Tools for Email Images
Prepare the perfect images for your email campaigns
Image Compressor
Compress images to reduce email file size and improve deliverability.
Bulk Image Resizer
Resize all your newsletter images to the same dimensions at once.
Add Watermark
Add your logo or branding to email images before sending.
Image Metadata Viewer
Check image resolution and file details before attaching to email.
Frequently Asked Questions — Email Image Sizes
Common questions about resizing images for email