Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 91% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

pdfmerger.biz

Split and merge PDF files. Free and open source - PDFsam

Page Load Speed

2.8 sec in total

First Response

345 ms

Resources Loaded

1.9 sec

Page Rendered

569 ms

pdfmerger.biz screenshot

About Website

Click here to check amazing PDF Merge R content. Otherwise, check out these important facts you probably never knew about pdfmerger.biz

A free and open source software to merge, split, rotate and extract pages from PDF files. For Windows, Linux and Mac

Visit pdfmerger.biz

Key Findings

We analyzed Pdfmerger.biz page load time and found that the first response time was 345 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

pdfmerger.biz performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

17/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

5/100

25%

SI (Speed Index)

Value5.8 s

50/100

10%

TBT (Total Blocking Time)

Value370 ms

71/100

30%

CLS (Cumulative Layout Shift)

Value0.583

11/100

15%

TTI (Time to Interactive)

Value10.0 s

27/100

10%

Network Requests Diagram

pdfmerger.biz

345 ms

www.pdfsam.org

41 ms

www.pdfsam.org

155 ms

pdfsam.org

27 ms

pdfsam.org

173 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Pdfmerger.biz, 64% (27 requests) were made to Pdfsam.org and 10% (4 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (655 ms) relates to the external source Pdfsam.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 74.8 kB (9%)

Content Size

816.4 kB

After Optimization

741.6 kB

In fact, the total size of Pdfmerger.biz main page is 816.4 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. 50% of websites need less resources to load. Images take 684.3 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 63.9 kB

  • Original 80.5 kB
  • After minification 68.4 kB
  • After compression 16.7 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 12.1 kB, which is 15% 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 63.9 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 3.6 kB

  • Original 684.3 kB
  • After minification 680.7 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. PDF Merge R images are well optimized though.

JavaScript Optimization

-14%

Potential reduce by 7.4 kB

  • Original 51.6 kB
  • After minification 51.6 kB
  • After compression 44.2 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 7.4 kB or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (48%)

Requests Now

33

After Optimization

17

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PDF Merge R. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

pdfmerger.biz accessibility score

97

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

pdfmerger.biz 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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

pdfmerger.biz SEO score

88

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Pdfmerger.biz can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Pdfmerger.biz 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

Open Graph data is detected on the main page of PDF Merge R. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: