How To Optimize Images For WordPress, A Complete Guide

In Life Trends

People on the internet don’t have a lot time to eat knowledge – as a result of there’s a lot of the latter. There’s a lot knowledge that we merely don’t have the time to learn all of it! As a content material curator for the trendy net, your process is to maximize throughput. The extra you specific with lesser phrases, the higher you might be at your job.

Why are Images (so very) Important?

There are many, many the explanation why your would (and will) use photos in your posts and articles:

  • Images function visible stimuli for a call-to-action (CTA). A CTA may be any process you need your customer to carry out. Common CTAs include subscribing to your e-newsletter, sharing your article over social media or shopping for your product.
  • Images improve the connection the author seeks to set up with the reader.
  • Images convey extra via much less.

It is subsequently, quintessentially vital that we use the proper photos in our shows (weblog submit, casual report, precise PowerPoint presentation and so on.) so as to go away a mark within the reader thoughts!

But wait! There’s a Challenge!

Images take up round 63% of the bandwidth utilized by fashionable web sites, so it’s more and more vital that they’re correctly optimized for velocity.

A one second delay in web page load instances might scale back conversion charges by 7%

We’ve established that people have a brief consideration span (one of many downsides of the trendy content material manufacturing price). Even for those who use the proper photos, if they don’t load throughout the acceptable timeframe, the curiosity is misplaced.

10 Most Common Image Optimization Errors

The majority of web sites have a Challenge – they use wonderful photos, however the best way the picture is served to the customer is poor. Large measurement, poor optimization, incorrect format, unnecessarily giant dimensions (sizes), unresponsive photos and careless search engine optimization errors, are among the commonest Challenges the trendy net faces. In at present’s article, we’re going to tackle these points!

1. Large Dimensions

“Extra Fries” aren’t at all times good

This one’s a traditional. Suppose you want a 150×150 pixel picture in your website’s “Team” web page. Usually, you’ll use a 5MP headshot, edit it a bit and at last add it.

Did you notice the Challenge? Some of us immediately add the precise 5MP picture! The WordPress theme will load your complete 5MP picture (that’s 5 x 10^6 pixels) and ask the browser to shrink it to the required dimension of 150x150px. In essence, the browser shows solely 0.0045% of the unique picture!

You find yourself losing each your and your customer’s bandwidth (even for those who’re serving the picture by way of a Content Delivery Network like MaxCDN), consuming extra onerous disk area and rising the load time. None of the options are one thing you’d need in your website.

Always resize (and by resize I imply downsize) the picture to the required dimensions after which add it!

You don’t want fancy software program to do that – there are free on-line instruments like you need to use to rapidly resize and optimize your photos. Just add and tweak your picture settings. When you’re executed Download your optimized picture to use in your website. The additionally supply a fast Image Compressor is you simply need to lower down on file measurement.

Helpful Tools:

  • IrfanView is a wonderful freeware to batch-resize your photos with superior choices like optimization, watermark and borders.
  • ImageMagick is a complicated open-source software which can be utilized in quite a lot of programming languages and working methods. You can write your individual app or just use it by way of the command line.
  • ImageOptim (Mac) permits you to drag complete folders and rapidly optimize a number of photos.
  • TinyPNG is an internet picture compression software with an API.

2. Incorrect Image Format



The format used for the image performs an important function. As a basic rule of thumb, use PNG for vector graphics and computer-generated photos equivalent to clip artwork and so on. Use JPEG for images or photos with quite a lot of colors. For an in depth clarification, take a look at this awesome StackOverflow answer.

3. Not utilizing Progressive JPEGs

Baseline (Normal) JPG versus Progressive JPGBaseline (Normal) JPG versus Progressive JPG

Baseline (Normal) JPG versus Progressive JPG

For the frequent man, JPEGs are of two varieties – Baseline and Progressive. Visually, each are similar. The difference lies in the best way they’re loaded:

  • Baseline JPEG has just one layer – containing the entire picture. When requested, your complete picture is loaded at one go.
  • Progressive JPEGs compose the picture with a number of layers. A Progressive JPEG picture is loaded layer by layer, which progressively will increase in high quality, finally providing you with a lossless view.
IrfanView Supports Batch Conversion with Progressive JPEGIrfanView Supports Batch Conversion with Progressive JPEG

IrfanView Supports Batch Conversion with Progressive JPEG

All main picture resizers permit you to save photos as Progressive JPEG.

4. Not utilizing Lazy Load

Lazy-Loading is a wonderful useful resource saving method the place a picture is loaded solely when the customer scrolls down to the view-frame of the picture. Consider an article – “15 of the Most Fuel-Efficient Cars in 2014”. Naturally, this text will include not less than 15 photos. And irrespective of the peak of the show gadget – monitor, pill, or smartphone, you can’t match all 15 photos within the view-frame. You should scroll down to view all the pictures.

With Lazy Loading enabled, photos might be loaded solely when a customer is within the neighborhood of the picture. In different phrases, the pictures begin to load simply whenever you scroll down to view it. The first few photos, nevertheless, are loaded instantaneously, because you’re already within the view-frame. Lazy Loading saves bandwidth at each ends and improves load time! You can use Lazy Loading in WordPress with the BJ Lazy Load Plugin.

5. Not utilizing a CDN



Using a Content Delivery Network (CDN) will serve the picture from a server which is bodily closest to the customer’s location. If a customer from India requests a picture, and the CDN has a POP (level of presence, or just a server) in Tokyo and New York, the picture might be served from the server situated in Tokyo.

When you will have appreciable visitors, you need to setup a CDN with WordPress so as to decrease your load time and acquire total efficiency. Here at WPExplorer, we advocate Cloudflare. For new-born websites, we might advocate a list of free CDN services you could possibly strive.

6. Not declaring the ‘alt’ Attribute

The ‘alt’ attribute describes the picture for the search engine. The text you enter on this area might be displayed to the consumer in case the picture can’t be loaded. A lot of people have a tendency to go away these fields clean. This could be very detrimental for search engine optimization, and also you lose out on visitors. You ought to at all times strive to include your website’s key phrases in your photos’ alt tag.

7. Not Optimizing Images



Optimized photos are 40% lighter than regular photos. This improves load-time and saves bandwidth. From Freddy’s checklist of the Best WordPress Image Optimization Plugins, we might advocate to optimize your photos. can be an ideal on-line choice for compressing photos in a jiffy. We use it on a regular basis right here at WPExplorer to optimize featured photos earlier than importing them to posts and theme demos.

8. Responsive Images

Responsive Web Design is hereResponsive Web Design is here

Responsive Web Design is right here

Even in case your website is responsive, doesn’t imply your photos are. That means the header picture you utilize for a 22” desktop display can be served to a 5” iPhone. When you add a picture, WordPress resizes it into a number of variations – Thumbnail, Medium, Full Size, and so on. This may be modified by the developer. A effectively coded theme will serve the “Medium” sized model of the picture, thereby saving bandwidth.

The Picturefill.WP plugin will change picture tags with a brand new <image> aspect that will serve totally different photos primarily based on media queries. It’s pretty experimental (meaning there are bugs) and shouldn’t be used on a reside website.

9. Image Captions

Captions aren’t at all times obligatory, though in some instances, it’s required – equivalent to screenshots in a tutorial. Captioning photos helps readers perceive the subject higher, whereas boosting your search engine optimization.

10. Image Filename

Think in regards to the filename from a search engine’s viewpoint. Use the identical text as you’d within the ‘title’ tag of the picture. Also, strive to include your key phrases which can be most related to your website.




Image search engine optimization is critically vital for any web site – outdated or new. Folks who implement picture search engine optimization correctly (it may be fairly mundane at instances), stand to acquire a big quantity of natural visitors (the very best sort of visitors) within the long term.

Have an superior optimization method? Fire away!