Report for


The overall score for this website.


How accessible the website is to mobile and disabled users.

The following tests contribute to this score:


How satisfying the website is likely to be for users.


How well marketed and popular the website is.


How well designed and built the website is.

Screenshot of

Nibbler tested a sample of 5 pages from this website at 11:57 AM on Jun 30, 2020 (BST).

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Top priorities for website improvement

  • Add printable stylesheets for all pages, wherever possible. In most cases, websites can share printable stylesheets over many or all pages, as with screen-based stylesheets. (read more)
  • Enable GZIP compression on your web server or in your application. (read more)
  • Add meaningful anchor text that describes the link's destination. If the link contains an image, ensure you have provided alt text. (read more)


0% of pages are optimized for printing

Media specific CSS detected

MediaMin widthMax widthCSS file

Server behavior7.0

Yes404 page


  • This website handles missing pages correctly by sending a 404 HTTP status code.
  • This website was not served using GZIP encoding. GZIP compression is widely supported and reduces the load time of a web page.
  • This website follows the best practice of using a permanent (HTTP 301) redirect between URLs with/without trailing slashes. This is ideal.
  • This website follows the best practice of using a permanent (HTTP 301) redirect from to This is ideal.


106,720 Most popular website in the world

There has been no mentionable change in this website's popularity recently.

  • This is the 106,720 most popular website in the world.
  • Over the past 3 months, this website has experienced no measurable change in popularity.
  • This website accounts for 78.2% of the Internet traffic to and its subdomains.

Source: Alexa

Meta tags8.4

  • All pages include at least some metadata, but only 80.0% of pages have a description meta tag. The description meta data is important as it appears on Google's search result pages.
    • Make sure that all the pages of this website include a meta description. If you don't include one, Google will choose a sample of text from the page to appear in the search engine result. By including a meta description, you can control how your search engine result will appear.

      Pages with no meta description

      Page URL

Meta Tags (name attribute)

Page URLNameContent Defense Fund Defense Fund protects the Earth’s resources using smart economics, practical partnerships and rigorous science. Our members help us tackle urgent problems., initial-scale=1.0 openings at EDF | Environmental Defense Fund list of job openings, plus descriptions of benefits and culture of EDF., initial-scale=1.0 EDF offices | Environmental Defense Fund of all offices of the Environmental Defense Fund., initial-scale=1.0 us | Environmental Defense Fund Us page for the Environmental Defense Fund, initial-scale=1.0 the media | Environmental Defense Fund, experts and updates for members of the press., initial-scale=1.0

Amount of content8.5

Rendering Chart...

  • This website has an average of 438 words per page. The amount of content on a website has been shown to correlate with its search engine ranking.
    • Consider the amount of text on this website and increase it if appropriate.

Amount of content discovered


biggest block breadcrumb buses california calling commitment connect contact conversation coronavirus donate economy electric energy epa's europe featured federal fuel future generations happening health here's huge illegal indonesia jakarta latest leaders lessons lyft's main market matters media members most names navigation offices other pollution protective resources results rules some states stories support three times trouble trucking trucks trump truth tuesday tweets twitter unscientific updates vehicles weakening what's work world york

  • All pages were found to use defined headings. This is excellent as it allows visitors and search engines to summarize the content of webpages quickly. Correctly defined headings aid accessibility and are particularly important for search engine optimization.
  • Some pages did not define headings correctly. The H1 tag should be used for the most top-level heading, with H2 being used for sub-headings and H3 for further sub-headings and so-on. Not conforming to this convention may confuse visitors.
    • Ensure that headings are defined in a semantically correct way, i.e. always start with a H1 tag. This is used to summarise the page content. Further tags (H2, H3, H4 etc) are meant to summarise and partition sections within the content.

Page headings detail

URLHeadingLevel a better world for future generationsH2 we get resultsH2's happening nowH2 when it matters mostH2 to support this workH2 navigationH2 storiesH3 updatesH3 truth about coronavirus, air pollution and our health »H3’s commitment to electric vehicles is huge. Three lessons for leaders.H4 energy job market is in trouble. Here's how we fix it.H4 Sue to Block Trump From Weakening Fuel Economy Rules (New York Times)H4 Tuesday – a conversation about ESGH4 of the biggest names in trucking are calling for federal support of electric trucks and busesH4“Illegal, unscientific, and un-health protective”: Summing up EPA’s final methylene chloride risk evaluationH4 EDFH4 openings at EDFH1 when it matters mostH2 to support this workH2 navigationH2 EDFH4 EDF officesH1 national officesH2 officesH2 regional officesH2 officesH2 navigationH2 York CityH4, D.C.H4 FranciscoH4, CaliforniaH4, TexasH4, North CarolinaH4, ArkansasH4, ColoradoH4, ChinaH4 Paz, MexicoH4, IndonesiaH4 EDFH4 usH1 servicesH2 navigationH2 asked questionsH3 in touchH3 EDFH4 the mediaH1 media team will connect you with the right EDF expertH2 updates on our workH2 navigationH2 releasesH3 & documentsH3 tweetsH3 EDFH4


7% of images have a clearly defined size

1 image is being resized by the browser


This website is linked with the Twitter account @envdefensefund

This website's Twitter account has

  • This website was found to link the Twitter account EDF (@envdefensefund).
  • This website's Twitter account has made 30,831 tweets to 198,079 followers.

Source: Twitter


Mobile screenshot of www.edf.orgTablet screenshot of
  • All of this website appears to be optimised for viewing on a mobile phone or a tablet.

Media specific CSS detected

MediaMin widthMax widthCSS file


100% of pages use analytics

Multiple Analytics Solutions

  • Every page in this website is using some form of analytics software. This is excellent and should allow for a complete analysis of visitor behavior.

Analytics Software Found

Software Name
Google Analytics
Google Tag Manager

Page titles10.0

100% of pages have defined titles

0% of page titles are weak

  • All pages were found to use page titles appropriately. Page titles appear in search results and at the top of the browser's window when visiting the site. Appropriate page titles are particularly important for search engine optimization.

URL format10.0

  • This website uses appropriate web addresses (URLs) throughout. This is excellent and will help search engine placement, usability and the marketability of this website.


Last updated June 29, 2020

  • It looks like this website was last updated on Monday, June 29, 2020. This is good because visitors perceive up-to-date websites as more credible. Websites that are updated regularly are also spidered by search engines more often.
  • To find this information we used the last modified dates reported by this website's server in addition to looking for dates written on each page.

All dates found

Domain agei

  • Sorry, we cannot check the domain age of .org websites.

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