Your email header image is the first thing subscribers see when they open your email — it sets the tone, communicates your brand, and determines whether they read on. At imgresizr.com, you can create and resize professional email header images at the correct width for any email platform, completely free.
Email Header Image Specifications
| Platform | Recommended Width | Max Height |
|---|---|---|
| Mailchimp | 600px wide | 200px typical |
| Klaviyo | 600px wide | 200px typical |
| Campaign Monitor | 600px wide | 300px typical |
| HubSpot | 600px wide | 250px typical |
| ConvertKit | 600px wide | 200px typical |
How to Create Email Headers at imgresizr.com
Upload your brand image or campaign graphic to imgresizr.com. Use the Resize tool to set the width to 600px — this is the universal email content width that displays correctly in all major email clients without horizontal scrolling. Set the height based on your template — a 200×600px banner looks clean and professional without taking up too much of the email view. Use the Crop tool to compose the image correctly for this wide, narrow banner format. For promotional emails, use the Caption tool to add your campaign headline directly to the header image. Ensure text is large enough to read at banner scale. Compress to under 200KB — large email images slow loading and increase spam scores.
Email Header Design Tips
- 600px is the standard email content width — use it consistently across all headers
- Include your logo in the header for instant brand recognition
- Keep the header image under 200KB to ensure fast loading in all email clients
- Design for mobile — over 60% of emails are opened on smartphones
- Avoid putting critical information only in images — email clients may block image loading
Create professional email header images at the right size, free at imgresizr.com.