What size should images be for email?

For inline images in email body: 600px wide is the standard (most email templates are 600px wide). For email signature logos: 150–300px wide. For photo attachments: scale to 1200–1600px wide, which gives good quality at reasonable file size.

What is the maximum image size for email attachments?

Gmail allows 25MB total per email, Outlook allows 20MB, and Yahoo Mail allows 25MB. A single large photo attachment can easily hit these limits. Resizing and compressing images is the simplest way to stay under the limit.

Should I use JPG or PNG for email images?

JPG is recommended for email because JPG files are smaller than PNG equivalents. Smaller attachments are faster to send and receive, and less likely to hit size limits.

How do I reduce an image file size for email without resizing?

Use the FixTools Image Compressor to reduce file size without changing dimensions. For typical photos, compression can reduce size by 50–80% with minimal visible quality loss.

Can I resize multiple images for email at once?

Yes. The FixTools Image Resizer supports batch resizing. Upload multiple images and apply the same dimensions to all of them in one operation.

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Resize Image for Email

Large image files cause email delivery problems — attachments may exceed size limits, slow download times, and display too large in the email body. Resizing images to email-appropriate dimensions solves all three issues. FixTools resizes your images for email in seconds, free and without a watermark.

⚡ Use Tool Now How it works

Cost: Free forever
Sign-up: Not required
Processing: In your browser
Privacy: Files stay local

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Reduce attachment file size for email limits

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Inline email images: 600px wide recommended

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Email signature photos: 150–300px wide

Image Tool

Image Resizer

All processing happens in your browser — your files are never uploaded to any server.

🚀Open Image Resizer

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How to use this tool

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For inline email images, resize to 600px wide. For email signatures, resize to 150–300px wide. For attachments you want to reduce, scale to 50–75% of original size.

How It Works

Step-by-step guide to resize image for email:

1
Determine your email image purpose
Inline body images: resize to 600px wide (most email clients render 600px content). Email signature images: 150–300px wide. Attachments: scale to 50–75% of original to reduce file size while maintaining usability.
2
Upload your image to FixTools
Open the Image Resizer and upload your image.
3
Enter the target width
Enter 600 as the width and enable Lock Aspect Ratio to auto-calculate the correct height.
4
Resize the image
Click Resize. The resulting image will be correctly sized for email.
5
Compress if still too large
If the attachment is still larger than needed, use the Image Compressor to reduce file size further without changing dimensions.