Tools & Wizards About Us
nefviewer.com screenshot

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

nefviewer.com

Free NEF Viewer - Free Nikon Digital RAW Image Viewer

Page Load Speed

730 ms in total

First Response

98 ms

Resources Loaded

528 ms

Page Rendered

104 ms

nefviewer.com screenshot

About Website

Click here to check amazing NEF Viewer content. Otherwise, check out these important facts you probably never knew about nefviewer.com

Free NEF Viewer – free software that lets you view .nef (Nikon Digital camera RAW images) files and convert them to other image formats (.bmp, .jpg, .gif, .png, .tiff)

Visit nefviewer.com

Key Findings

We analyzed Nefviewer.com page load time and found that the first response time was 98 ms and then it took 632 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

nefviewer.com performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value6.2 s

43/100

10%

TBT (Total Blocking Time)

Value5,220 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.523

15/100

15%

TTI (Time to Interactive)

Value12.9 s

13/100

10%

Network Requests Diagram

nefviewer.com

98 ms

style.css

37 ms

show_ads.js

6 ms

plusone.js

133 ms

ca-pub-0383171207177200.js

129 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 21% of them (5 requests) were addressed to the original Nefviewer.com, 29% (7 requests) were made to Apis.google.com and 17% (4 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (248 ms) relates to the external source Googleads.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 444.1 kB (61%)

Content Size

732.2 kB

After Optimization

288.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Nefviewer.com main page is 732.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 30% of websites need less resources to load. Javascripts take 690.4 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 20.0 kB

  • Original 25.2 kB
  • After minification 20.0 kB
  • After compression 5.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 5.2 kB, which is 21% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 20.0 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 3 B

  • Original 15.8 kB
  • After minification 15.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. NEF Viewer images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 423.5 kB

  • Original 690.4 kB
  • After minification 690.4 kB
  • After compression 266.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 423.5 kB or 61% of the original size.

CSS Optimization

-71%

Potential reduce by 530 B

  • Original 743 B
  • After minification 452 B
  • After compression 213 B

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Nefviewer.com needs all CSS files to be minified and compressed as it can save up to 530 B or 71% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (48%)

Requests Now

23

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NEF Viewer. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

nefviewer.com

nefviewer.com

98 ms

style.css

style.css

37 ms

show_ads.js

show_ads.js

6 ms

plusone.js

plusone.js

133 ms

ca-pub-0383171207177200.js

ca-pub-0383171207177200.js

129 ms

zrt_lookup.html

zrt_lookup.html

174 ms

show_ads_impl.js

show_ads_impl.js

73 ms

ga.js

ga.js

13 ms

nef_package_small.png

nef_package_small.png

110 ms

paypal.gif

paypal.gif

178 ms

pixel.gif

pixel.gif

162 ms

__utm.gif

__utm.gif

102 ms

ads

ads

244 ms

osd.js

osd.js

57 ms

ads

ads

248 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

49 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

70 ms

fastbutton

fastbutton

92 ms

ads

ads

203 ms

postmessageRelay

postmessageRelay

63 ms

rs=AGLTcCOnDxwX8-LbpDmaxOBIoHm7W_kGNA

rs=AGLTcCOnDxwX8-LbpDmaxOBIoHm7W_kGNA

11 ms

971028622-postmessagerelay.js

971028622-postmessagerelay.js

27 ms

rpc:shindig_random.js

rpc:shindig_random.js

25 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

2 ms

Accessibility Review

nefviewer.com accessibility score

87

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

Best Practices

nefviewer.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

nefviewer.com SEO score

100

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nefviewer.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Nefviewer.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

nefviewer.com

Open Graph description is not detected on the main page of NEF Viewer. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: