Best Image Size for Email Newsletters

Updated May 10, 2026 · 7 min read

There is no single magic number, but there is a sensible range for email newsletters. Newsletter images load inside email clients, often on mobile data, so every kilobyte counts toward a fast open.

Recommended settings for email newsletters

SettingStarting point
FormatJPEG (WebP where accepted)
Widthabout 1200 px on the long edge
Quality70
File size150 KB or less

These are practical defaults. If the platform or form you are using publishes its own limits, follow those instead.

Best Image Size

As a starting point, aim for roughly 1200 pixels on the long edge and a file size at or below 150 KB. That combination looks clean on modern screens without wasting bandwidth.

If the place you upload to publishes its own limits, those always win. Treat the numbers here as a practical default when no rule is given, and adjust down if uploads fail or pages feel slow.

Step by step with TheCompressJPEG

  1. Open the compress JPEG to 150 KB tool, or the main compressor for custom settings.
  2. Drop in your image. Nothing is uploaded; it is processed in your browser.
  3. Set the maximum width to 1200 and the target size to 150 KB.
  4. Press Compress, check the result and download it.
Ready to try it? Compress your JPEG to 150 KB now. It's free and private.

Quick tips

  • Check the result on a phone, where most people will see it.
  • Use consistent dimensions for a set of related images.
  • Resize before you compress; it improves quality at any file size.
  • Write a size limit slightly below the stated maximum to leave a margin.

FAQ

What JPEG quality should I use for e-learning courses?

Quality around 78 keeps photos looking natural while cutting file size substantially.

Will compressing reduce image quality for e-learning courses?

Some detail is removed, but at sensible settings the difference is not visible at normal viewing size.

How do I compress many images for e-learning courses at once?

Drop all of them into the tool together and use Download all to get a single ZIP.

Wrapping up

For email newsletters, the reliable recipe is simple: resize to around 1200 pixels, compress at quality 70 or to a 150 KB target, and check the result before you upload. Keep the original so you can always start again.

Related guides