Analyze Outlook PST Viewer to Open or Read PST File Without Outlook

Outlook PST Viewer also known as PST File Opener is a free utility that allows user to read Outlook emails, contacts & calendar even if they are corrupted or inaccessible.

Page load speed analysis

  • 52/100

    Normal result
  • 5

    Successful tests
  • 3

    Failed tests
  • First response

    261 ms

  • Resources loaded

    1.6 sec

  • Page rendered

    309 ms

  • Total page load time

    2.2 sec

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We analyzed page load time and found that the first response time was 261 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Page optimization

  • HTML 23.0 kB
    Images 184.2 kB
    Javascripts 219.6 kB
    CSS 307.9 kB

    In fact, the total size of main page is 734.8 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. 40% of websites need less resources to load. CSS take 307.9 kB which makes up the majority of the site volume.

    • Original 23.0 kB
    • After minification 23.0 kB
    • After compression 5.1 kB

    HTML optimization

    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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 17.9 kB or 78% of the original size.

    • Original 184.2 kB
    • After optimization 162.2 kB

    Image optimization

    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. Obviously, Outlook PST Viewer needs image optimization as it can save up to 22.1 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

    • Original 219.6 kB
    • After minification 195.1 kB
    • After compression 66.3 kB

    JavaScript optimization

    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 153.4 kB or 70% of the original size.

    • Original 307.9 kB
    • After minification 275.4 kB
    • After compression 36.8 kB

    CSS optimization

    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. needs all CSS files to be minified and compressed as it can save up to 271.1 kB or 88% of the original size.

Network requests diagram

  • global.min.css
  • typo.min.css
  • fontello.css
  • tabs.min.css
  • accordion.min.css
  • tables.min.css
  • testimonials.min.css
  • jquery.fancybox.css
  • owl.carousel.css
  • owl.theme.css
  • logo.gif
  • pst-viewer.png
  • windows10-outlook-2016.png
  • preview-items-with-attributes.png
  • scan-&-recover-corrupt-pst-file.png
  • preview-items-with-all-details.png
  • switch-screen-mode.png
  • outlook-style-interface.png
  • no-ms-outlook-installation-required.png
  • pst-viewer.gif
  • scan-mode.gif
  • preview-mail.gif
  • switch-view.gif
  • secure.png
  • feature-1.png
  • system-specification.png
  • feature-2.png
  • feature-3.png
  • feature-4.png
  • feature-5.png
  • feature-6.png
  • feature-7.png
  • feature-8.png
  • feature-9.png
  • feature-9-a.png
  • feature-10.png
  • jquery.min.js
  • jquery.easing.js
  • global.min.js
  • tab.min.js
  • accordion.min.js
  • jquery.fancybox.js
  • fancybox.init.js
  • owl.carousel.min.js
  • custom-a.js
  • feature-11.png
  • analytics.js
  • html-bg.gif
  • hexagon.png
  • cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff
  • DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff
  • k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff
  • fontello.woff
  • xjAJXh38I15wypJXxuGMBobN6UDyHWBl620a-IRfuBk.woff
  • analytics.js
  • triangle-testimonials.png
  • icon-man.png
  • collect

Our browser made a total of 61 requests to load all elements on the main page. We found that 70% of them (43 requests) were addressed to the original, 20% (12 requests) were made to and 7% (4 requests) were made to The less responsive or slowest element that took the longest time to load (862 ms) belongs to the original domain

Additional info on


The browser has sent 51 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Outlook PST 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 from 10 to 1 for CSS and as a result speed up the page load time.









Possible request optimization











Normal result


As for redirects, our browser was forwarded to before it reached this domain.

IP address uses IP address which is currently shared with 4 other domains. The more sites share the same IP address, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Poor result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 14397
NS 86400
NS 86400

86400 Mname:
Serial: 2021071102
Refresh: 3600
Retry: 1800
Expire: 1209600
Minimum-ttl: 86400
MX 14400 Pri: 0

Language and encoding

Normal result


EN en language flag


N/A  language flag





Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 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 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.

HTTPS certificate

SSL Certificate has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

The server of is located in United States, but, unfortunately, we cannot identify the countries where the visitors come from and thus it’s impossible to define if the distance can potentially affect the page load time.

Good result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of Outlook PST 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:

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