mailEmail Tool

Email Signature Image Optimizer

Resize and compress logos, banners, and headshots for professional email signatures. Control exact dimensions and file size for Gmail, Outlook, and Apple Mail.

Presets

Logo, Banner, Avatar

Max Target

500 KB

Output

PNG or JPEG

Processing

100% Local

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cloud_upload

Drop your logo or photo here

Supports JPEG, PNG, WebP, SVG

Select File

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Key details

Supported Inputs

JPEG, PNG, WebP, SVG

Supported Outputs

PNG, JPEG

Max Initial File Size

No limit (local processing)

Min Output Size

~10 KB

Data Privacy

Processed locally in browser

How it works

Upload Image

Drag and drop your logo, banner, or headshot.

Choose Preset

Select a common size or enter custom dimensions.

Set Target Size

Use the slider to compress the file to your desired size limit.

Download or Copy

Save the optimized image or copy it directly to your clipboard.

Frequently asked questions

What is the best logo size for an email signature?

For a standard email signature logo, a width of 150px to 300px and a height of 50px to 100px is ideal. We provide a 200x50 preset which works well in most layouts.

Why does my signature image look blurry in Outlook?

Outlook can sometimes rescale images poorly. It is recommended to use the exact dimensions you want displayed, rather than relying on HTML width/height attributes to shrink a larger image.

Should I use PNG or JPEG for my signature?

Use PNG (Transparent) if your logo needs to appear over different background colors. Use JPEG (White) if your logo has a solid background and you want the smallest possible file size.

How do I support Retina displays?

To make your logo crisp on high-resolution screens, upload an image that is exactly twice the dimensions you want it displayed at, then set the display dimensions in your email clients HTML signature code.

Is my image uploaded to your servers?

No. The Email Signature Image Optimizer processes everything locally in your web browser. Your images are never uploaded or stored on our servers, ensuring complete privacy.

What file size should an email signature image be?

Aim for a small file that still looks sharp, often under 100KB for a logo. The right limit depends on your company mail policy and the number of images in the signature.

Will the result work in Gmail and Outlook?

The exported PNG or JPEG can be inserted into most mail clients. Check the final signature in both desktop and mobile clients because rendering and scaling can differ.

Bharat Kumar G.verified

Technical SEO & Document Processing Expert

Bharat is the founder of ReadyToSubmit. With years of experience in technical web development, he builds privacy-first, client-side tools to help Indian government exam aspirants format their applications accurately and securely without server uploads.

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