Email clients have strict image size limits and rendering quirks. This tool helps you resize images to dimensions that display correctly across Gmail, Outlook, Apple Mail, and all major clients.
Images that are too large get blocked or slow down email loading. Many corporate email systems block images over 100KB. Properly sized images ensure your emails look professional everywhere.
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Dimensions pre-set to 600×400px. Upload your image and resize instantly.
Resize Image to 600×400px Now100% browser-based • No upload to server • No sign-up required
How to Resize Image for Email — Newsletter & Signature Optimized
- Upload your image
- Choose: Newsletter (600×400) or Signature (300×100)
- Click Resize to optimize
- Download and insert into your email
Pro Tips
- Newsletter hero image: 600×400px, under 100KB
- Email signature logo: 300×100px or 200×50px, under 20KB
- Most email content areas are 600px wide — never exceed this
- Use JPG for photos, PNG for logos with transparency
Frequently Asked Questions
What size should email images be?
Newsletter images: 600px wide maximum (height varies). Email signature logos: 200-300px wide, 50-100px tall. Keep all images under 100KB.
Why do my email images not show?
Many email clients block images by default. Keep images under 100KB, use alt text, and avoid images as the only content. Some corporate firewalls block images over certain sizes.
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