Email image presets

Resize Images for Email

Center-crop one image to a useful hero, body, square, wide or thumbnail email preset in your browser.

Last updated: August 2026

5 Presets

Layout Options

Center Crop

Fill Method

JPEG 88

Fixed Output

Private

No Uploads

Upload image for Email

Tap to select or drag and drop. JPEG, PNG, WebP, AVIF, HEIC.

Your file never leaves this device.

How to resize an image for email

01

Choose one image

Drop or select one supported image. It stays on your device.

02

Choose a layout preset

Match the preset to the real width and aspect ratio of your email content block.

03

Inspect the center crop

Check that scaling and cropping did not remove text, products or faces near an edge.

04

Download and test

Download the JPEG, place it in the message and test the email in the clients your audience uses.

Email image preset guide

These are starting points, not standards enforced by every email builder. Match the real content block you will use.

Hero / header

Convenient 3:1 banner for a 600px content area.

600 × 200

Body image

Full-width 3:2 image for a roughly 600px legacy layout.

600 × 400

Square content

Square product, profile or content-card image.

600 × 600

Wide high-resolution

Separate 1.91:1 preset; it is not an exact 2× 600×200 banner.

1200 × 628

Two-column thumbnail

Half-width starting point before accounting for gaps and padding.

300 × 200

Before adding an image to an email

Match the actual template

Mailchimp documents 600px legacy templates and 660px newer templates, so there is no universal width.

Account for padding

A 600px template with side padding may need an image narrower than 600px.

Use higher-resolution sources carefully

A larger source can look sharper on high-density screens when constrained to the intended display size.

Keep downloads reasonable

This resizer does not target a KB limit. Check the downloaded file and compress separately when needed.

Use RGB images

Email and web images should use an RGB color workflow rather than print-oriented CMYK.

Test before sending

Cropping, scaling and client rendering should be checked in a real campaign preview or test email.

Guidance checked against Mailchimp's current template image recommendations. Your email service and template remain the final reference.

What the resizer actually does

The source scales until it fills the selected target. A different aspect ratio is cropped equally around the center, with no crop-position control.

Every preset exports JPEG at fixed quality 88. The tool does not preserve transparency or source metadata, add responsive email code, or enforce a target KB size.

Common email image-resize mistakes

Treating 600px as universal

The correct width depends on the builder, template, columns and padding.

Calling 1200×628 a 2× hero

It does not share the 3:1 aspect ratio of 600×200; a true 2× version would be 1200×400.

Missing the center crop

A different source aspect ratio loses pixels around opposite edges.

Expecting PNG or transparency

Every preset downloads as JPEG at fixed quality 88.

Assuming a preset guarantees a small file

The component reports the result size but does not enforce 80KB, 200KB or any other limit.

Skipping email-client tests

Pixel dimensions alone do not guarantee responsive or consistent display across email clients.

Why use ImgTweak?

✓Runs locally in your browser
✓No image uploads
✓Five useful layout presets
✓Clear dimensions and output size
✓Warns when a source is upscaled
✓Free with no account required

Frequently asked questions

Is 600 pixels the required width for every marketing email?

No. A 600px content area is common in legacy templates, but builders vary. For example, Mailchimp documents 600px legacy templates and 660px newer templates. Match the actual content block in your chosen builder or custom HTML.

Is the 1200 by 628 preset a Retina version of the 600 by 200 hero?

No. A true 2× version of 600 by 200 would be 1200 by 400. The 1200 by 628 option has a different, wider-content aspect ratio and is included as a separate high-resolution preset.

Will the tool crop my email image?

Yes, when the source and preset have different aspect ratios. The source scales to fill the target, then excess pixels are cropped equally around the center. There is no crop-position control.

What format and quality does the email resizer export?

Every preset exports JPEG at fixed quality 88. PNG transparency and the source format are not preserved, and there is no quality or exact-file-size control.

Does this tool make images responsive in an email?

No. It creates an image with fixed pixel dimensions. Responsive display depends on the image block, width attributes and CSS used by your email builder or HTML template.

Can I resize several newsletter images at once?

No. The interface accepts one source file and produces one preset result at a time. You can reuse the loaded source for another preset and download each result separately.

Are my email images uploaded?

No. Decoding, resizing, center-cropping and JPEG encoding happen locally in your browser.

Ready to resize your email image?

Choose one image above, inspect the crop, and download a private browser-generated JPEG.