How to Optimize an Image for Your Blog (3 Easy Steps)

Adam Smartschan

Partner & Chief Strategy Officer

Good photos and graphics can make your blog posts really sing. But doing it wrong hurts more than it helps. Here’s how to optimize an image for your blog in two easy steps.

First, we should cover why you should optimize images. Can you just drag it into your post editor and let the CMS figure it out?

I mean, sure.

But you shouldn’t.

First off, stock photos and raw graphics are huge. Check out the info on this simple download from Envato Elements:

Optimize images for your blog - info on stock photo

First off, it’s over 4,000 pixels wide. The most common desktop browser width is 1,366 pixels. You could probably display this thing high res on a 55-inch monitor. That’s great, right?

Well, no.

Each pixel in an image contains information. And information adds weight. As a result, this image is almost 4 megabytes in size. That’s huge in image terms. And even if you’re asking your CMS to “shrink” it for you, it’s still serving up the entire 3.9 MB to the user.

That means a slow page, and unhappy users. (To say nothing of Google.) It’s even worse on mobile!

So yes, you need to optimize website images.

How to Optimize Images for Your Blog (3 Steps)

Step 1: Acquire Imagery Legally

The first thing you need to do, obviously, is get your image. The most common sources are stock photo sites (like Envato and iStock). You can get free images on platforms like Unsplash. Or you can create your own images.

Whatever you do, don’t just grab something from Google Images. It’s almost certainly not licensed for you, and we’ve seen rights trolls hit companies with bills for thousands of dollars for unlicensed imagery. Pay a few bucks and resist the temptation.

Step 2: Size Your Image

Once you have your image, you’ll want to size it properly.

Most blog layouts are between 650 and 1,024 pixels wide. If you want a full-width image – quite common – use a screenshot app to highlight your entire column, like so:

Finding the right column size on your blog

This will tell you the column width in pixels.

If you want something smaller, you can choose just about anything. You typically can’t display an image wider than the content column itself.

Once you have an image size in mind, you’ll need to use software to shrink or crop it properly.

The most common software used to optimize images for blogs is Adobe Photoshop. It’s not cheap, but it’s the best of the bunch. (And it’s what we’ll be using in this tutorial.)

If you don’t want to invest in a Creative Cloud license to get Photoshop, you can also try free image sizing apps like:

(The process is basically the same in all of them.)

Steps for Blog Image Resizing in Photoshop

  • Open your image
  • Go to Image >> Image Size in the menu
  • Select your desired width (the height will adjust automatically)
  • Hit OK

That’s it! Your image is now the right size.

Sizing images in Photoshop for your blog

Now it’s time to save your image.

I still like the old-fashioned “Save for Web” command in Photoshop. There are other ways, but this is fine for most basic use cases.

Steps for Saving Blog Images in Photoshop

  • Go to File >> Export >> Save for Web (Legacy) in the menu
  • Pick your file type. Typically, you want a JPG for a photo and a PNG for a graphic.
  • Click Save

That’s it! Your properly sized blog image is now in whatever folder you saved it to.

Step 3: Compress Your Image

Your image is now properly sized and decent small. But there’s one last step to get it blog-ready: compression.

Compression removes as much file size as possible from images without compromising quality. An image saved from Photoshop is darn close to perfectly optimized, but this last step saves you precious page weight.

I like Optimizilla for quick online image compression. It’s fast and extremely easy. You just drag and drop your image, or pick it from an uploader. When it’s done, you download it.

You can see that that image was already pretty well optimized. Optimizilla only chopped 5% off it. But that’s still something!

Now that you’ve properly optimized an image for your blog, go ahead and post it! Your readers will thank you for not making them load a bunch of unnecessary data. And Google will reward you, too!

Adam Smartschan

Adam Smartschan heads Altitude's strategic marketing and branding efforts. An award-winning writer and editor by trade in a former life, he now specializes in data analytics, search engine optimization, digital advertising strategy, conversion rate optimization and technical integrations. He holds numerous industry certifications and is a frequent speaker on topics around B2B marketing strategy and SEO.