Esawebb.org - SEO Checker

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Overview of the SEO Check
Meta information
61% 
Page quality
48% 
Page structure
60% 
Link structure
55% 
Server
85% 
External factors
100% 
SEO Score
Response time
0.72 s
File size
127.10 kB
Words
411
Media files
25
Number of links
109 internal / 20 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
ESA/Webb
The page title is too short. (99 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1
google-site-verificationKTjYtxjG6PEMU6XMF7LY4nMnJ7MXxYaNzVY6SYTo1Qc
author[email protected]
langen
twitter:cardsummary
og:titleESA/Webb Space Telescope
og:descriptionThe ESA page for the James Webb Space Telescope, the space-based observatory that has revolutionised modern astronomy.
og:imagehttp://cdn.esawebb.org/archives/images/screen/ann2203a.jpg
og:image:secure_urlhttps://cdn.esawebb.org/archives/images/screen/ann2203a.jpg
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
No paragraphs were detected.
There are only 411 words on this page. Good pages should have about 800 words of useful content.
20.9% of the text are stop words.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 8 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/assets/images/esa-jwst-logo.pngESA/Webb logo
/assets/images/esa-logo.pngESA logo
/assets/images/esa-jwst-logo.pngESA logo
...archives/images/wallpaper1/weic2429a.jpgFound: first actively forming galaxy as lightweight as young Milky Way
...archives/images/wallpaper1/weic2428a.jpgWebb finds surprises in Spiderweb protocluster field
...archives/images/wallpaper1/weic2427a.jpgSombrero Galaxy dazzles in new Webb image
...archives/images/wallpaper1/weic2426a.jpgWebb and Hubble examine spooky galaxy pair
...archives/images/banner1920/weic2429a.jpgFound: first actively forming galaxy as lightweight as young Milky Way
...archives/images/banner1920/weic2428a.jpgWebb finds surprises in Spiderweb protocluster field
...archives/images/banner1920/weic2427a.jpgSombrero Galaxy dazzles in new Webb image
...archives/images/banner1920/weic2426a.jpgWebb and Hubble examine spooky galaxy pair
...archives/images/wallpaper1/potm2411a.jpgTracing spiral arms in infrared
...archives/images/wallpaper1/potm2410a.jpgCatching the edge of the Phantom Galaxy
...archives/images/wallpaper1/potm2409a.jpgThe exotic stellar population of Westerlund 1
...archives/images/wallpaper1/potm2408a.jpgPeeking into Perseus
.../archives/images/wallpaper1/ann2403a.jpgCover page of the 2025 ESA/Hubble and ESA/Webb calendar
.../archives/images/wallpaper1/ann2402a.jpgESA/Hubble & ESA/Webb Science Writer
...archives/images/wallpaper1/weic2311a.jpgCassiopeia A (MIRI Image)
.../archives/images/wallpaper1/ann2303a.jpgCover page of the 2024 ESA/Hubble and ESA/Webb calendar
....org/archives/images/screen/ann2201a.jpgSPACE SPARKS VIDEO SERIES
....org/archives/images/screen/ann2203a.jpgESA/HUBBLE/WEBB SCIENCE NEWSLETTER
...org/archives/images/screen/weic2210a.jpgWEBB'S FIRST IMAGES RELEASE: JULY, 2022
...chives/images/screen/ESAHubbleWebb-1.jpgTake a look to our newsletters
.../archives/images/screen/Updates-from.jpgSuscribirse a Webb News

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.
There are 26 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H4 Press Releases
H4 Picture of the Month
H4 Announcements
H4 SPACE SPARKS VIDEO SERIES
H4 ESA/HUBBLE/WEBB SCIENCE NEWSLETTER
H4 WEBB'S FIRST IMAGES RELEASE: JULY, 2022
H4 ESA/Webb Facebook
H4 ESA/Webb on Twitter
H4 ESA/Webb Copyright
H4 Subscribe to Webb News
H5 Found: first actively forming galaxy as lightweight as young Milky Way
H5 Webb finds surprises in Spiderweb protocluster field
H5 Sombrero Galaxy dazzles in new Webb image
H5 Webb and Hubble examine spooky galaxy pair
H5 Found: first actively forming galaxy as lightweight as young Milky Way Duplicate text
H5 Webb finds surprises in Spiderweb protocluster field Duplicate text
H5 Sombrero Galaxy dazzles in new Webb image Duplicate text
H5 Webb and Hubble examine spooky galaxy pair Duplicate text
H5 Tracing spiral arms in infrared
H5 Catching the edge of the Phantom Galaxy
H5 The exotic stellar population of Westerlund 1
H5 Peeking into Perseus
H5 Announcement of the 2025 ESA Hubble and Webb Calendar
H5 Call for ESA/Hubble & ESA/Webb Science Writer
H5 Royal Astronomical Society Group Achievement Award for JWST-MIRI Team
H5 Announcement of the 2024 ESA Hubble and Webb Calendar
Some anchor texts are used more than once.
1 links don't have an anchor text.
There are 12 links with a trivial anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 20 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://esawebb.org/IMG-ALT ESA/Webb logo
https://esahubble.org/subscribe/External Subscribe to Webb News
https://esawebb.org/search/No Text
https://www.esa.int/External Subdomain IMG-ALT ESA logo
https://esawebb.org/Home
https://esawebb.org/news/News
https://esawebb.org/news/Press Releases
/news/scientists/newsworthy-re...Newsworthy Results
/news/archive/year/2024/2024
/news/archive/year/2023/2023
/news/archive/year/2022/2022
/news/archive/year/2021/2021
/announcements/Announcements
/announcements/archive/year/2024/Text duplicate 2024
/announcements/archive/year/2023/Text duplicate 2023
/announcements/archive/year/2022/Text duplicate 2022
https://esawebb.org/images/potm/Picture of the Month
/images/potm/archive/year/2024/Text duplicate 2024
/images/potm/archive/year/2023/Text duplicate 2023
/images/potm/archive/year/2022/Text duplicate 2022
https://esawebb.org/images/Images
https://esawebb.org/images/All images
https://esawebb.org/images/potm/Text duplicate Picture of the Month
https://esawebb.org/videos/Videos
/about/general/mision-overview/General
/about/general/mision-overview/Mission Overview
/about/general/fact-sheet/Fact Sheet
/about/instruments/miri/MIRI
/about/instruments/nirspec/NIRSpec
/about/instruments/nircam-niriss/NIRCam & NIRISS
/about/general/sun-shield/Sun Shield
/about/general/mirrors/Mirrors
/about/general/orbit/Orbit
/about/general/spectroscopy-wi...Spectroscopy with Webb
/about/general/webb-and-other-...Webb & Other Space Telescopes
/about/general/webb-scientific...Webb's Scientific Method
/about/general/image-processing/Image Processing
/about/webb-and-europe/interna...International Collaboration
/about/webb-europe/ariane-lauc...Ariane Launcher
/about/webb-europe/outreach-team/ESA/Webb Outreach Team
/about/science/other-worlds/Other Worlds
/about/science/lifecycle-of-st...The Lifecycle of Stars
/about/science/the-early-unive...The Early Universe
/about/science/galaxies-over-t...Galaxies Over Time
https://esawebb.org/about/faqFAQ
/news/scientists/newsworthy-re...Text duplicate Newsworthy Results
https://esawebb.org/initiatives/Initiatives
/initiatives/webbs-first-images/Webb's First Images
https://esawebb.org/wordbank/Word Bank
/initiatives/public-resources/Public Resources
/initiatives/public-resources/...Virtual Meeting Backgrounds
https://www.esa.int/About_Us/E...External Subdomain ESA Webb Seeing Farther Brochure
/products/calendars/Calendars
/products/calendars/archive/ye...Text duplicate 2024
/products/calendars/archive/ye...Text duplicate 2023
https://esawebb.org/newsletters/ESA/Webb Newsletters
/newsletters/webbnews/ESA/Webb News
/newsletter/science/ESA/Hubble/Webb Science Newsletter
/forscientists/announcement/Science Announcements
/media-images-videos/Media
https://esawebb.org/copyright/Usage of ESA/Webb Images & Videos
/press-mailinglist/Subscribe to the Media Newsletter
https://esawebb.org/contact/Contact
https://www.facebook.com/ESAWebb/New window External Subdomain No Text
https://twitter.com/ESA_WebbNew window External No Text
https://www.instagram.com/esaw...New window External Subdomain No Text
https://www.youtube.com/user/H...New window External Subdomain No Text
https://www.linkedin.com/compa...New window External Subdomain No Text
https://www.flickr.com/photos/...New window External Subdomain No Text
https://giphy.com/esawebbNew window External No Text
https://esawebb.org/news/Text duplicate Press Releases
/news/weic2429/IMG-ALT Found: first actively forming galaxy as lightweight as young Milky Way
/news/weic2429/Text duplicate Found: first actively forming galaxy as lightweight as young Milky Way
/news/weic2429/Trivial anchor text
Read More
/news/weic2428/IMG-ALT Webb finds surprises in Spiderweb protocluster field
/news/weic2428/Text duplicate Webb finds surprises in Spiderweb protocluster field
/news/weic2428/Text duplicate Trivial anchor text
Read More
/news/weic2427/IMG-ALT Sombrero Galaxy dazzles in new Webb image
/news/weic2427/Text duplicate Sombrero Galaxy dazzles in new Webb image
/news/weic2427/Text duplicate Trivial anchor text
Read More
/news/weic2426/IMG-ALT Webb and Hubble examine spooky galaxy pair
/news/weic2426/Text duplicate Webb and Hubble examine spooky galaxy pair
/news/weic2426/Text duplicate Trivial anchor text
Read More
https://esawebb.org/news/Explore all Press Releases
/news/weic2429/Found: first actively forming galaxy as lightweight as young Milky Way 11 December 2024 — weic2429
IMG-ALT Found: first actively forming galaxy as lightweight as young Milky Way
/news/weic2428/Webb finds surprises in Spiderweb protocluster field 4 December 2024 — weic2428
IMG-ALT Webb finds surprises in Spiderweb protocluster field
/news/weic2427/Sombrero Galaxy dazzles in new Webb image 25 November 2024 — weic2427
IMG-ALT Sombrero Galaxy dazzles in new Webb image
/news/weic2426/Webb and Hubble examine spooky galaxy pair 31 October 2024 — weic2426
IMG-ALT Webb and Hubble examine spooky galaxy pair
https://esawebb.org/images/potm/Text duplicate Picture of the Month
/images/potm2411a/IMG-ALT Tracing spiral arms in infrared
/images/potm2411a/Text duplicate Tracing spiral arms in infrared
/images/potm2411a/Text duplicate Trivial anchor text
Read More
/images/potm2410a/IMG-ALT Catching the edge of the Phantom Galaxy
/images/potm2410a/Text duplicate Catching the edge of the Phantom Galaxy
/images/potm2410a/Text duplicate Trivial anchor text
Read More
/images/potm2409a/IMG-ALT The exotic stellar population of Westerlund 1
/images/potm2409a/Text duplicate The exotic stellar population of Westerlund 1
/images/potm2409a/Text duplicate Trivial anchor text
Read More
/images/potm2408a/IMG-ALT Peeking into Perseus
/images/potm2408a/Text duplicate Peeking into Perseus
/images/potm2408a/Text duplicate Trivial anchor text
Read More
/announcements/Text duplicate Announcements
/announcements/ann2403/IMG-ALT Cover page of the 2025 ESA/Hubble and ESA/Webb calendar
/announcements/ann2403/Announcement of the 2025 ESA Hubble and Webb Calendar
/announcements/ann2403/Text duplicate Trivial anchor text
Read More
/announcements/ann2402/IMG-ALT ESA/Hubble & ESA/Webb Science Writer
/announcements/ann2402/Call for ESA/Hubble & ESA/Webb Science Writer
/announcements/ann2402/Text duplicate Trivial anchor text
Read More
/announcements/ann2401/IMG-ALT Cassiopeia A (MIRI Image)
/announcements/ann2401/Royal Astronomical Society Group Achievement Award for JWST-MIRI Team
/announcements/ann2401/Text duplicate Trivial anchor text
Read More
/announcements/ann2303/IMG-ALT Cover page of the 2024 ESA/Hubble and ESA/Webb calendar
/announcements/ann2303/Announcement of the 2024 ESA Hubble and Webb Calendar
/announcements/ann2303/Text duplicate Trivial anchor text
Read More
/videos/archive/category/space...ESA/Webb Space Sparks
IMG-ALT SPACE SPARKS VIDEO SERIES
/newsletter/science/ESA/Hubble/JWST Science Newsletter - April 2022
IMG-ALT ESA/HUBBLE/WEBB SCIENCE NEWSLETTER
/initiatives/webbs-first-images/12 July 2022
IMG-ALT WEBB'S FIRST IMAGES RELEASE: JULY, 2022
https://twitter.com/ESA_Webb?r...External Tweets by ESA_Webb
https://esawebb.org/copyright/IMG-ALT Take a look to our newsletters
https://esawebb.org/newsletters/IMG-ALT Suscribirse a Webb News
https://www.facebook.com/ESAWebb/New window External Subdomain No Text
https://twitter.com/ESA_WebbNew window External No Text
https://www.instagram.com/esaw...New window External Subdomain No Text
https://www.youtube.com/user/H...New window External Subdomain No Text
https://www.linkedin.com/compa...New window External Subdomain No Text
https://www.flickr.com/photos/...New window External Subdomain No Text
https://giphy.com/esawebbNew window External No Text
https://www.encisosystems.com/External Subdomain Enciso Systems S.A
https://www.cdn77.com/External Subdomain Accelerated by CDN77

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://esawebb.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time of 0.72 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (127 kB).

HTTP Response Header

NameValue
dateSat, 14 Dec 2024 21:36:25 GMT
content-typetext/html; charset=utf-8
expiresSat, 14 Dec 2024 21:41:25 GMT
cache-controlmax-age=300
varyAccept-Encoding
access-control-allow-origin*
access-control-allow-methodsGET, POST, PUT, OPTIONS, HEAD, PATCH, DELETE
access-control-allow-headersAuthorization, Origin, X-Requested-With, Content-Type, Accept
cf-cache-statusDYNAMIC
server-timingcfCacheStatus;desc="DYNAMIC"
report-to{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=2%2Fsmte%2BwfJcUMREh%2FfDFbQcqaBnym1T6y%2B5YlQXtoQZ2aQyOxFx7pRUBq2ptw35k4BHWUldUbr7qow3PEni4RDGTAwRKWqhXhr7ZKQ0vkGiLFpWeIQHLaOw3oWBQzw%3D%3D"}],"group":"cf-nel","max_age":604800}
nel{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
servercloudflare
cf-ray8f21544a6cbed117-CDG
content-encodinggzip
alt-svch3=":443"; ma=86400
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 3,248 referring domains.
This page has 375,133 backlinks.
This page has backlinks from 1,946 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

No valid Robots.txt file was found.

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Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Webb61%Check
Hubble Webb51%Check
Webb News50%Check
Webb Science50%Check
Webb Calendar50%Check
Webb Space49%Check
Hubble Webb Science48%Check
Hubble46%Check
Image46%Check
First Images45%Check
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