Nist.gov - SEO Checker

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Visión general del análisis SEO
Metadatos
80% 
Calidad de la página
94% 
Estructura
79% 
Enlazado
90% 
Servidor
86% 
Factores externos
100% 
Puntuación SEO
Tiempo de carga
1,05 s
Tamaño HTML
90,30 kB
Palabras
688
Medios
20
Cantidad de enlaces
135 internos / 19 externos

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Metadatos

Título
(Extremadamente importante)
National Institute of Standards and Technology
La longitud del título es óptima (415 píxeles de una longitud máxima de 580 píxeles).
No se repite ninguna palabra en el título.
Meta descripción
(Extremadamente importante)
NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
La meta descripción es demasiado larga: 1000 píxelesOptimizar la descripción.
Rastreabilidad
(Extremadamente importante)
No se detectan problemas para acceder al sitio web.
Redirección canónica
(Importante)
https://www.nist.gov/
La página tiene una redirección canónica correcta.
Idioma
(Poco importante)
Idioma reconocido automáticamente en el contenido: en
Idioma declarado en el código HTML: en
Ubicación geográfica del servidor: Canadá
El idioma ha sido correctamente declarado en el código HTML: en.
Enlaces Alternate/Hreflang
(Poco importante)
No se ha encontrado ningún enlace alternativo (alternate) en esta página.
Otras Metaetiquetas
(Poco importante)
No se detecta ninguna metaetiqueta de paginación rel next en la página.
No se detecta ninguna metaetiqueta de paginación rel prev en la página.
Dominio
(Poco importante)
El dominio no es un subdominio.
La longitud del nombre del dominio es buena.
El dominio no contiene caracteres especiales.
URL de la página
(Poco importante)
No se detecta ningún parámetro dinámico en la URL.
No se detecta ningún ID de sesión en la URL.
La URL no contiene demasiados subdirectorios.
Codificación de caracteres
(Poco importante)
La codificación de caracteres (UTF-8) ha sido declarada correctamente.
Doctype
(Deseable)
La etiqueta doctype HTML 5 está configurada correctamente.
La declaración del doctype se ubica al inicio del código HTML.
Favicon
(Deseable)
El favicon está enlazado correctamente.

Metaetiquetas

NombreValor
descriptionNIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
citation_titleNational Institute of Standards and Technology | NIST
dcterms.titleNational Institute of Standards and Technology
dcterms.subjectWorking with industry and science to advance innovation and improve quality of life.
dcterms.typetext
dcterms.formattext/html
dcterms.identifierhttps://www.nist.gov/national-institute-standards-and-technology
dcterms.sourceNIST
dcterms.modified2025-07-24T11:51-04:00
msvalidate.019802F04AC0DBFA09E639BA8F2E349685
google-site-verificationQMu0ODkER3rN5hLcMLqNVf7e3bkjYsNLTuhqfH48jCA
GeneratorDrupal 10 (https://www.drupal.org)
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, initial-scale=1.0
nist_search_modified2025-07-24T11:51:00-04:00
nist_search_bundlehomepage
langen
twitter:cardsummary_large_image
twitter:descriptionNIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
twitter:siteNIST
twitter:titleNational Institute of Standards and Technology
twitter:imagehttps://www.nist.gov/themes/custom/nist_www/img/homepage/nist_mark.png
twitter:image:altNIST Logo
og:site_nameNIST
og:typewebsite
og:urlhttps://www.nist.gov/
og:titleNational Institute of Standards and Technology
og:descriptionNIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life
og:imagehttps://www.nist.gov/themes/custom/nist_www/img/homepage/nist_mark.png
og:image:width2048
og:image:height1152
og:image:altNIST Logo
charsetutf-8

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Calidad de la página

Contenido
(Extremadamente importante)
El número total de palabras en la página es bueno: 688 palabras.
Un 23.5% del contenido está constituido por palabras vacías.
Las palabras clave del título también se repiten en el texto del cuerpo.
La página contiene un listado, lo que indica una buena estructuración del contenido.
Se han encontrado 7 párrafos en esta página.
El contenido en formato texto de esta página es óptimo.
No se detecta ningún placeholder de texto ni imagen.
No se detecta contenido duplicado.
La cantidad media de palabras por frase es buena: 11 palabras.
Frames
(Extremadamente importante)
Esta página no utiliza ningún frameset.
Optimización para móviles
(Poco importante)
No se ha especificado ningún icono de Apple Touch.
El valor de la etiqueta viewport es correcto: (width=device-width, initial-scale=1.0).
Etiquetas Bold y Strong
(Poco importante)
El uso de etiquetas de negritas en esta página es óptimo. Te recomendamos emplear hasta 14 etiquetas de negritas en una página.
Optimización de imágenes
(Poco importante)
No se detecta ninguna descripción del atributo ALT en 2 imágenes. El contenido de los atributos ALT también es evaluado como texto por los buscadores y es muy importante para la búsqueda de imágenes.
Redes Sociales
(Deseable)
Esta página está perfectamente optimizada para las redes sociales.
Etiquetas markup adicionales
(Deseable)
No se detecta ninguna etiqueta markup (de Schema.org) adicional.
HTTPS
(Poco importante)
El sitio utiliza HTTPS para transferir datos de forma segura.
Todos los archivos incluidos se transfieren a través de HTTPS.

Lista de medios

URLAtributo ALTTítulo
...onent-library/dist/img/us_flag_small.pngU.S. flag
...ponent-library/dist/img/icon-dot-gov.svgCarece de atributo ALT
...omponent-library/dist/img/icon-https.svgCarece de atributo ALT
...ry/dist/img/logo/nist_logo_sidestack.svgNational Institute of Standards and Technology
.../dist/img/logo/NIST-Logo-Brand-White.svgNational Institute of Standards and Technology
.../dist/img/usa-icons-bg/search--white.svgSearch
..._www/img/homepage/chips_logo_mark.png?v1CHIPS.gov logo
..._1756010999.jpg?h=fee4874d&itok=RVLlPCjUClose-up photo of multicolored gummy bears lying on a surface with cannabis buds interspersed.
..._resized_5x.jpg?h=0740c477&itok=KFsy1toYAn image showing 22 pairs of numbered and color-coded chromosomes on a black background.
...25 topright.png?h=75d159d7&itok=3UtzR7fXMap of Puerto Rico has colored sections near the center with key: Landslides per km2
...C02700 copy.jpg?h=caf26d13&itok=2kvnF5pnFour researchers pose standing around a large piece of scientific equipment covered with wiring and electronics.
...14/DSC00230.JPG?h=a141e9ea&itok=QaekKmciA man wearing a yellow hardhat and fire-resistant jacket points to burnt frame of a window.
...lab_samples.jpg?h=cd9e8a72&itok=wuFKUK8KResearcher in safety glasses and gloves sits at a lab bench working with small test tubes.
...ard1_angled.jpg?h=790be497&itok=7yGC6IUqCircuit board with various square chips and gold screws. Small letters in the center say: NIST True Bq.
..._at_NZ-2387.jpg?h=ed34f166&itok=XvP3X9PJLisa Ng kneels, holding parts of a circular fan built into a room divider.
...g/homepage/wattbalance_1600_x_800.jpg?v1Photograph of the NIST-4 Kibble watt balance in blue light.
...age/nist_gaithersburg_campus_2400.jpg?v1Photograph of the NIST Gaithersburg Campus
.../dist/img/logo/NIST-Logo-Brand-White.svgNational Institute of Standards and Technology logo

Estructura de la página

Encabezado H1
(Extremadamente importante)
No se ha detectado ningún encabezado H1.
Encabezados
(Importante)
En la estructura de los encabezados H faltan uno o varios niveles.

Estructura de los encabezados

Jerarquía de encabezadosContenido
H2 Driving Innovation
H2 What we do
H2 CHIPS for America
H2 NIST in your State
H2 What’s new
H2 America’s national measurement institute
H2 NIST in your inbox
H3 NIST Makes First Detection of Cannabis in Breath From Edibles
H3 NIST Releases Trove of Genetic Data to Spur Cancer Research
H3 NIST Shares Preliminary Findings From Hurricane Maria Investigation
H3 NIST Ion Clock Sets New Record for Most Accurate Clock in the World
H3 NIST’s Alex Maranghides Receives Service to America Medal
H3 Measure Twice, Cut Once: How Measuring Molecular ‘Scissors’ Can Further Groundbreaking Research
H3 New NIST Method Precisely Measures Radioactivity in Tiny Samples
H3 Clearing the Air: How an Air Quality Researcher Takes Care of the Air Her Family Breathes
H3 HEADQUARTERS
Algunos enlaces internos contienen parámetros dinámicos. Las URL internas no deberían contener parámetros dinámicos, salvo que estén marcadas como nofollow.
Algunos textos ancla se repiten más de una vez en varios enlaces.
La cantidad de enlaces internos es adecuada.
Ningún texto ancla es excesivamente largo.
Hay 19 enlaces externos en esta página.

Enlaces detectados en esta página

EnlacePropiedadesTexto ancla
https://www.nist.gov/Texto ancla Skip to main content
https://www.nist.gov/IMG-ALT National Institute of Standards and Technology
A-TITLE National Institute of Standards and Technology
https://www.nist.gov/careersCareers
https://shop.nist.gov/Externo Subdominio Shop
/about-nist/contact-usContact
https://www.nist.gov/publicationsPublications
https://www.nist.gov/topicsAll Topics
/advanced-communicationsAdvanced communications
/artificial-intelligenceArtificial intelligence
https://www.nist.gov/bioscienceBioscience
/buildings-constructionBuildings and construction
https://www.nist.gov/chemistryChemistry
/cybersecurityCybersecurity
https://www.nist.gov/electronicsElectronics
https://www.nist.gov/energyEnergy
https://www.nist.gov/environmentEnvironment
https://www.nist.gov/fireFire
/forensic-scienceForensic science
https://www.nist.gov/healthHealth
/information-technologyInformation technology
/infrastructureInfrastructure
/manufacturingManufacturing
https://www.nist.gov/materialsMaterials
/mathematics-statisticsMathematics and statistics
https://www.nist.gov/metrologyMetrology
/nanotechnologyNanotechnology
/neutron-researchNeutron research
/performance-excellencePerformance excellence
https://www.nist.gov/physicsPhysics
/public-safetyPublic safety
/quantum-information-scienceQuantum information science
https://www.nist.gov/resilienceResilience
https://www.nist.gov/standardsStandards
/transportationTransportation
https://www.nist.gov/adlpAssoc Director of Laboratory Programs
https://www.nist.gov/laboratoriesLaboratories
https://www.nist.gov/ctlCommunications Technology Laboratory
https://www.nist.gov/elEngineering Laboratory
https://www.nist.gov/itlInformation Technology Laboratory
https://www.nist.gov/mmlMaterial Measurement Laboratory
https://www.nist.gov/pmlPhysical Measurement Laboratory
/user-facilitiesUser Facilities
https://www.nist.gov/ncnrNIST Center for Neutron Research
https://www.nist.gov/cnstCNST NanoFab
/research-test-bedsResearch Test Beds
/laboratories/projects-programsResearch Projects
/laboratories/tools-instrumentsTools & Instruments
/major-programsMajor Programs
https://www.nist.gov/baldrigeBaldrige Performance Excellence Program
https://www.nist.gov/chipsCHIPS for America Initiative
https://www.nist.gov/mepManufacturing Extension Partnership (MEP)
https://www.nist.gov/oamOffice of Advanced Manufacturing
https://www.nist.gov/spoSpecial Programs Office
https://www.nist.gov/tpoTechnology Partnerships Office
/standards-measurementsMeasurements and Standards
https://www.nist.gov/calibrationsCalibration Services
https://www.nist.gov/nvlapLaboratory Accreditation (NVLAP)
/nist-quality-systemQuality System
https://www.nist.gov/srmStandard Reference Materials (SRMs)
https://www.nist.gov/sriStandard Reference Instruments (SRIs)
https://www.nist.gov/standardsgovStandards.gov
/pml/time-and-frequency-divisi...Time Services
https://www.nist.gov/pml/owmOffice of Weights and Measures
/services-resources/softwareSoftware
https://www.nist.gov/dataData
https://webbook.nist.gov/chemi...Externo Subdominio Chemistry WebBook
https://nvd.nist.gov/Externo Subdominio National Vulnerability Database
/pml/productsservices/physical...Physical Reference Data
https://www.nist.gov/srdStandard Reference Data (SRD)
https://shop.nist.gov/Externo Subdominio Storefront
https://www.nist.gov/tpoLicense & Patents
https://csrc.nist.gov/Externo Subdominio Computer Security Resource Center (CSRC)
/nist-research-libraryNIST Research Library
/news-events/newsNews
/news-events/eventsEvents
https://www.nist.gov/blogsBlogs
/feature-storiesFeature Stories
https://www.nist.gov/awardsAwards
/video-galleryVideo Gallery
/image-galleryImage Gallery
/pao/media-contactsMedia Contacts
https://www.nist.gov/about-nistAbout Us
/director/leadershipLeadership
/director/nist-organization-st...Organization Structure
/about-nist/budget-planningBudget & Planning
/about-nist/contact-usContact Us
/about-nist/visitVisit
https://www.nist.gov/careersTexto duplicado Careers
/iaao/academic-affairs-officeStudent programs
/about-nist/work-nistWork with NIST
https://www.nist.gov/historyHistory
http://nistdigitalarchives.con...Externo Subdominio NIST Digital Archives
https://www.nist.gov/nist-museumNIST Museum
/nist-and-nobelNIST and the Nobel
https://www.nist.gov/educationEducational Resources
/artificial-intelligenceArtificial Intelligence
https://www.nist.gov/bioscienceTexto duplicado Bioscience
/cybersecurityTexto duplicado Cybersecurity
https://www.nist.gov/energyTexto duplicado Energy
/manufacturingTexto duplicado Manufacturing
/advanced-communicationsNext-Gen Communications
/quantum-information-scienceQuantum Science
https://www.nist.gov/standardsTexto duplicado Standards
https://www.nist.gov/topicsSee more topics
https://www.nist.gov/chipsCHIPS for America
A-TITLE Learn more at chips.gov
https://www.nist.gov/chipsIMG-ALT CHIPS.gov logo
A-TITLE Learn more at chips.gov
https://www.nist.gov/chipsLearn more
A-TITLE Learn more at chips.gov
https://www.nist.gov/statesNIST in your State
https://www.nist.gov/statesTexto duplicado Learn more
/news-events/news/2025/07/nist...NIST Makes First Detection of Cannabis in Breath From Edibles
IMG-ALT Close-up photo of multicolored gummy bears lying on a surface with cannabis buds interspersed.
A-TITLE Go to NIST Makes First Detection of Cannabis in Breath From Edibles
/news-events/news/2025/07/nist...NIST Releases Trove of Genetic Data to Spur Cancer Research
IMG-ALT An image showing 22 pairs of numbered and color-coded chromosomes on a black background.
A-TITLE Go to NIST Releases Trove of Genetic Data to Spur Cancer Research
/news-events/news/2025/07/nist...NIST Shares Preliminary Findings From Hurricane Maria Investigation
IMG-ALT Map of Puerto Rico has colored sections near the center with key: Landslides per km2
A-TITLE Go to NIST Shares Preliminary Findings From Hurricane Maria Investigation
/news-events/news/2025/07/nist...NIST Ion Clock Sets New Record for Most Accurate Clock in the World
IMG-ALT Four researchers pose standing around a large piece of scientific equipment covered with wiring and electronics.
A-TITLE Go to NIST Ion Clock Sets New Record for Most Accurate Clock in the World
/news-events/news/2025/07/nist...IMG-ALT A man wearing a yellow hardhat and fire-resistant jacket points to burnt frame of a window.
/news-events/news/2025/07/nist...NIST’s Alex Maranghides Receives Service to America Medal
/blogs/taking-measure/measure-...IMG-ALT Researcher in safety glasses and gloves sits at a lab bench working with small test tubes.
/blogs/taking-measure/measure-...Measure Twice, Cut Once: How Measuring Molecular ‘Scissors’ Can Further Groundbreaking Research
/news-events/news/2025/07/new-...IMG-ALT Circuit board with various square chips and gold screws. Small letters in the center say: NIST True Bq.
/news-events/news/2025/07/new-...New NIST Method Precisely Measures Radioactivity in Tiny Samples
/blogs/taking-measure/clearing...IMG-ALT Lisa Ng kneels, holding parts of a circular fan built into a room divider.
/blogs/taking-measure/clearing...Clearing the Air: How an Air Quality Researcher Takes Care of the Air Her Family Breathes
/news-events/newsSee NIST News
https://www.nist.gov/nmiFAQ
/services-resources/standards-...Standards and Measurements
https://www.nist.gov/nist-workHow NIST’s Measurements Work for You
https://public.govdelivery.com...Externo Subdominio Sign Up
/webform/page_feedback?page=ht...Was this page helpful?
https://www.nist.gov/IMG-ALT National Institute of Standards and Technology logo
A-TITLE National Institute of Standards and Technology
/cdn-cgi/l/email-protectionWebmaster
/about-nist/contact-usSubdominio Texto duplicado Contact Us
https://www.nist.gov/visitSubdominio Our Other Offices
https://x.com/NISTExterno X.com
https://www.facebook.com/NISTExterno Subdominio Facebook
https://www.linkedin.com/compa...Externo Subdominio LinkedIn
https://www.instagram.com/nist/Externo Subdominio Instagram
https://www.youtube.com/NISTExterno Subdominio YouTube
https://giphy.com/nistExterno Giphy
/news-events/nist-rss-feedsSubdominio RSS Feed
https://public.govdelivery.com...Externo Subdominio Mailing List
/form/nist-gov-feedback?destin...Nofollow Feedback
A-TITLE Provide feedback
/privacy-policySubdominio Site Privacy
/oism/accessibilitySubdominio Accessibility
https://www.nist.gov/privacySubdominio Privacy Program
/oism/copyrightsSubdominio Copyrights
https://www.commerce.gov/vulne...Externo Subdominio Vulnerability Disclosure
/no-fear-act-policySubdominio No Fear Act Policy
/office-director/freedom-infor...Subdominio FOIA
/environmental-policy-statementSubdominio Environmental Policy
/summary-report-scientific-int...Subdominio Scientific Integrity
/nist-information-quality-stan...Subdominio Information Quality Standards
https://www.commerce.gov/Externo Subdominio Commerce.gov
http://www.science.gov/Externo Subdominio Science.gov
http://www.usa.gov/Externo Subdominio USA.gov
https://vote.gov/Externo Vote.gov

Configuración del servidor

Redirecciones HTTP
(Extremadamente importante)
Esta página redirige a "https://www.nist.gov/".
Cabecera HTTP
(Importante)
La cabecera X-Powered-by no se envía en la cabecera de la página.
El servidor web transmite la página web (HTML) comprimida.
Rendimiento
(Poco importante)
Con 1,05 segundos, el tiempo de respuesta de la página es superior al límite recomendado de 0,4 segundos. Un tiempo de respuesta elevado ralentiza innecesariamente el rastreo de los buscadores y propicia una mala experiencia de uso.
El tamaño HTML de la página es adecuado: 90 kB.

Cabecera HTTP

NombreValor
dateFri, 25 Jul 2025 15:53:10 GMT
content-typetext/html; charset=UTF-8
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expiresSun, 19 Nov 1978 05:00:00 GMT
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strict-transport-securitymax-age=31536000
varyCookie,Accept-Encoding
viavarnish
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x-cacheHIT
x-cache-hits24303
x-content-type-optionsnosniff
x-drupal-cacheHIT
x-frame-optionsSAMEORIGIN
x-generatorDrupal 10 (https://www.drupal.org)
x-request-idv-b183e340-692d-11f0-a67b-47462d03fcf5
cf-cache-statusDYNAMIC
set-cookie274 Caracteres
server-timingcfCacheStatus;desc="DYNAMIC"
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Factores externos

Wikipedia enlaza esta página en sus fuentes.
Esta página recibe enlaces de calidad de otros sitios web.
Esta página recibe backlinks de 14.909 dominios de referencia.
Esta página recibe un total de 628.513 backlinks.
Esta página recibe backlinks de 8.262 direcciones IP distintas.

Backlinks desde Wikipedia

Descubre más links en la función de búsqueda de Wikipedia

Robots.txt

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed

# Noindex files
Disallow: /system/files/documents/noindex/
Disallow: /index.php/system/files/documents/noindex/

# Search
Disallow: /fusion-search
Disallow: /index.php/fusion-search
Disallow: /site-search
Disallow: /index.php/site-search
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www.nist.gov
National Institute of Standards and Technology
NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life

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