Spark.apache.org - SEO Checker

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Overview of the SEO Check
Meta information
98% 
Page quality
80% 
Page structure
100% 
Link structure
100% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.06 s
File size
36.40 kB
Words
697
Media files
35
Number of links
32 internal / 16 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Apache Spark™ - Unified Engine for large-scale data analytics
The length of the page title is perfect. (558 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Apache Spark is a multi-language engine for executing data engineering, data science, and machine learning on single-node machines or clusters.
The length of the meta description is perfect. (900 pixels out of 1000 max pixel length)
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: Canada
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)
This page is hosted on a subdomain. Use a top level domain for better SEO results.
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 character encoding is not specified in the HTTP header.
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
descriptionApache Spark is a multi-language engine for executing data engineering, data science, and machine learning on single-node machines or clusters.
langen
twitter:cardsummary_large_image
twitter:site@ApacheSpark
twitter:titleApache Spark™ - Unified Engine for large-scale data analytics
twitter:descriptionApache Spark is a multi-language engine for executing data engineering, data science, and machine learning on single-node machines or clusters.
twitter:imagehttps://spark.apache.org/images/spark-twitter-card-large.jpg
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
This page contains 697 words. That's ok.
23.1% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
10 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 20 words is good.
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 14 tags for this page.
Image SEO
(Somewhat important)
25 images have no alt attribute. The content of alt attributes is used by search engines.
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
/images/spark-logo-rev.svgNo alt attribute provided
/images/batch-sstreaming-data-icon.svgBatch/streaming data
/images/sql-analytics-icon.svgSQL analytics
/images/data-science-scale-icon.svgData science at scale
/images/machine-learning-icon.svgMachine Learning
/images/scikit-learn.pngNo alt attribute provided
https://spark.apache.org/images/pandas.pngNo alt attribute provided
/images/tf_logo_social.pngNo alt attribute provided
https://spark.apache.org/images/pytorch.pngNo alt attribute provided
/images/mlflow-logo.pngNo alt attribute provided
https://spark.apache.org/images/r_logo.pngNo alt attribute provided
https://spark.apache.org/images/numpy.pngNo alt attribute provided
/images/superset.pngNo alt attribute provided
...owerBI-Logo-Square-Insight-Platforms.pngNo alt attribute provided
/images/looker_logo.pngNo alt attribute provided
https://spark.apache.org/images/redash.pngNo alt attribute provided
/images/tableau-logo-tableau-software.pngNo alt attribute provided
https://spark.apache.org/images/dbt.pngNo alt attribute provided
/images/Elasticsearch.pngNo alt attribute provided
https://spark.apache.org/images/mongo.pngNo alt attribute provided
https://spark.apache.org/images/kafka.pngNo alt attribute provided
/images/delta-lake-logo.pngNo alt attribute provided
/images/kubernetes-horizontal-color.pngNo alt attribute provided
/images/AirflowLogo.pngNo alt attribute provided
/images/Apache_Parquet_logo.pngNo alt attribute provided
/images/sqlserver.pngNo alt attribute provided
/images/1280px-Cassandra_logo.pngNo alt attribute provided
/images/Apache_Orc_logo.pngNo alt attribute provided
/images/AQE-compersion.pngNo alt attribute provided
/images/icon-orange-mailing-list.svgMailing list
/images/icon-orange-built-in-functions.svgSource code
/images/icon-orange-Delta-Table.svgNews and events
/images/icon-orange-Collaborative.svgHow to contribute
/images/icon-orange-Scheduled-Jobs.svgIssue tracking
...es/icon-orange-data-engineer-persona.svgCommitters

Page structure

H1 heading
(Critically important)
Unified engine for large-scale data analytics
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Unified engine for large-scale data analytics
H2 What is Apache Spark™?
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 16 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://spark.apache.org/No Text
/downloads.htmlDownload
https://spark.apache.org/sql/SQL and DataFrames
/spark-connect/Spark Connect
/streaming/Spark Streaming
/pandas-on-spark/pandas on Spark
https://spark.apache.org/mllib/MLlib (machine learning)
https://spark.apache.org/graphx/GraphX (graph)
/third-party-projects.htmlThird-Party Projects
/docs/latest/Latest Release
/documentation.htmlOlder Versions and Other Resources
https://spark.apache.org/faq.htmlFrequently Asked Questions
/examples.htmlExamples
/community.htmlMailing Lists & Resources
/contributing.htmlContributing to Spark
/improvement-proposals.htmlImprovement Proposals (SPIP)
https://issues.apache.org/jira...External Subdomain Issue Tracker
/powered-by.htmlPowered By
/committers.htmlProject Committers
/history.htmlProject History
https://privacy.apache.org/pol...External Subdomain Privacy Policy
/developer-tools.htmlUseful Developer Tools
/versioning-policy.htmlVersioning Policy
/release-process.htmlRelease Process
/security.htmlSecurity
https://github.com/apache/sparkExternal spark
https://github.com/apache/spar...External spark-connect-go
https://github.com/apache/spar...External spark-connect-swift
https://github.com/apache/spar...External spark-docker
https://github.com/apache/spar...External spark-kubernetes-operator
https://github.com/apache/spar...External spark-website
https://www.apache.org/External Subdomain Apache Homepage
https://www.apache.org/licenses/External Subdomain License
https://www.apache.org/foundat...External Subdomain Sponsorship
https://www.apache.org/foundat...External Subdomain Thanks
https://www.apache.org/events/...External Subdomain Event
/docs/latest/quick-start.htmlGet Started
/docs/latest/sql-performance-t...Adaptive Query Execution
/docs/latest/sql-ref-ansi-comp...Support for ANSI SQL
/docs/latest/sql-data-sources-...Structured and unstructured data
/community.htmlMailing list
IMG-ALT Mailing list
https://github.com/apache/sparkExternal Source code
IMG-ALT Source code
https://spark.apache.org/news/News and events
IMG-ALT News and events
/contributing.htmlHow to contribute
IMG-ALT How to contribute
https://issues.apache.org/jira...External Subdomain Issue tracking
IMG-ALT Issue tracking
/committers.htmlCommitters
IMG-ALT Committers
/trademarks.htmltrademarks
https://www.apache.org/licenses/External Subdomain Apache License, Version 2.0

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://spark.apache.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.06 seconds.
The file size of the HTML document is fine (36 kB).

HTTP Response Header

NameValue
serverApache
last-modifiedWed, 09 Apr 2025 02:08:21 GMT
etag"9182-6324ef1869266-gzip"
content-encodinggzip
access-control-allow-origin*
content-security-policydefault-src 'self' data: blob: 'unsafe-inline' 'unsafe-eval' https://www.apachecon.com/ https://www.communityovercode.org/ https://*.apache.org/ https://apache.org/ https://*.scarf.sh/ https://*.algolia.net/ https://*.algolianet.com/ https://*.algolia.io/; script-src 'self' data: blob: 'unsafe-inline' 'unsafe-eval' https://www.apachecon.com/ https://www.communityovercode.org/ https://*.apache.org/ https://apache.org/ https://*.scarf.sh/ https://*.algolia.net/ https://*.algolianet.com/ https://*.algolia.io/; style-src 'self' data: blob: 'unsafe-inline' 'unsafe-eval' https://www.apachecon.com/ https://www.communityovercode.org/ https://*.apache.org/ https://apache.org/ https://*.scarf.sh/ https://*.algolia.net/ https://*.algolianet.com/ https://*.algolia.io/; frame-ancestors 'self'; frame-src 'self' data: blob: 'unsafe-inline' 'unsafe-eval' https://www.apachecon.com/ https://www.communityovercode.org/ https://*.apache.org/ https://apache.org/ https://*.scarf.sh/ https://*.algolia.net/ https://*.algolianet.com/ https://*.algolia.io/; worker-src 'self' data: blob:;
content-typetext/html
via1.1 varnish, 1.1 varnish
accept-rangesbytes
dateSat, 09 Aug 2025 19:01:45 GMT
age8855
x-served-bycache-hel1410021-HEL, cache-fra-etou8220083-FRA
x-cacheHIT, HIT
x-cache-hits12, 1
x-timerS1754766106.674648,VS0,VE2
varyAccept-Encoding
strict-transport-securitymax-age=31536000; includeSubDomains; preload
content-length6622
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 5,634 referring domains.
This page has 108,337 backlinks.
This page has backlinks from 3,758 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

Sitemap: https://spark.apache.org/sitemap.xml

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spark.apache.org
Apache Spark™ - Unified Engine for large-scale data analytics
Apache Spark is a multi-language engine for executing data engineering, data science, and machine learning on single-node machines or clusters.

Most important keywords

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

KeywordResultRecheck
data76%Check
Spark75%Check
Apache75%Check
engine75%Check
Apache Spark75%Check
Data Analytics71%Check
large-scale data69%Check
Unified engine68%Check
large-scale data analytics68%Check
analytics64%Check
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