Don't Let Images Weigh Down Your Site

Slides from the presentation at WordCamp Miami 2018

Nobody likes a slow site. Every year the weight of an average site keeps increasing, mainly because of image sizes. Optimizing images is very important when it comes to your website speed.
In this presentation, we will focus on different image formats and steps to follow before uploading them to a website. We’ll discuss PNG, JPG, GIF, SVG and when to use each one.
We’ll set up a process to prepare images for the web, and go over tools to measure loading time. We’ll also look at some examples of before and after image optimization.

Transcript

1. DON’T LET IMAGES WEIGH DOWN YOUR SITE WordCamp Miami - 2018 IRINA BLUMENFELD @irinablumenfeld #wcmia Slides: netmagik.com/wordcamp-miami-2018
2. #wcmia - @irinablumenfeld netmagik.com
3. #wcmia - @irinablumenfeld netmagik.com 53% of visits to MOBILE sites are abandoned after 3 seconds Source: Google’s Double Click
4. #wcmia - @irinablumenfeld netmagik.com Etsy 160kb 12% bounce rate wpostats.com
5. #wcmia - @irinablumenfeld netmagik.com
6. #wcmia - @irinablumenfeld netmagik.com source: httparchive.org AVERAGE PAGE - 3.8 MB
7. I M A G E F O R M AT S JPEG PNG GIF SVG
8. #wcmia - @irinablumenfeld netmagik.com • Most Popular • Great for Photos • Lossy JPEG
9. #wcmia - @irinablumenfeld netmagik.com • DO NOT USE! • Big in size • Use PNG instead GIF
10. #wcmia - @irinablumenfeld netmagik.com • Great for Logos, 
 Images with few colors • Transparency • PNG-8 vs PNG-24 PNG
11. #wcmia - @irinablumenfeld netmagik.com • Vector graphics • Small in size • Great for logos, icons • Transparency • Can be used inline in HTML SVG
12. #wcmia - @irinablumenfeld netmagik.com I M A G E S I Z E 1.7 Mb 3264 x 2448 px
13. #wcmia - @irinablumenfeld netmagik.com S C A L E / R E S I Z E • Photoshop • Imsanity WordPress Plugin 3200 px 800 px
14. #wcmia - @irinablumenfeld netmagik.com S AV E F O R W E B J P E G Baseline vs Progressive
15. #wcmia - @irinablumenfeld netmagik.com S AV E F O R W E B Baseline JPEG Example
16. #wcmia - @irinablumenfeld netmagik.com S AV E F O R W E B Progressive JPEG Example
17. #wcmia - @irinablumenfeld netmagik.com O P T I M I Z E / C O M P R E S S Lossy vs Lossless
18. #wcmia - @irinablumenfeld netmagik.com O P T I M I Z E / C O M P R E S S • Tinypng.com • Kraken.io • EWWW WordPress Plugin • Compress JPG and PNG WordPress Plugin
19. #wcmia - @irinablumenfeld netmagik.com E X A M P L E Original Optimized Source: unsplash.com
20. #wcmia - @irinablumenfeld netmagik.com E X A M P L E Original - High Resolution 4951 x 3301 px 3.9 Mb 1. Resize / Save for Web 1600 x 1067 px 338 Kb 2. Optimize (tinypng.com) 1600 x 1067 px 207 Kb ( -40% )
21. #wcmia - @irinablumenfeld netmagik.com E X A M P L E Original - 3.9 Mb Optimized - 207 Kb Source: unsplash.com
22. #wcmia - @irinablumenfeld netmagik.com T E S T • gtmetrix.com • tools.pingdom.com/fpt • webpagetest.org
23. #wcmia - @irinablumenfeld netmagik.com W E B PA G E T E S T. O R G
24. #wcmia - @irinablumenfeld netmagik.com W E B PA G E T E S T. O R G
25. #wcmia - @irinablumenfeld netmagik.com T H A N K Y O U Slides: netmagik.com/wordcamp-miami-2018 Twitter: @irinablumenfeld E-Mail: irina@netmagik.com