diff --git a/src/components/Layout/Layout.tsx b/src/components/Layout/Layout.tsx
index 779687f77152..edee5d2e291c 100644
--- a/src/components/Layout/Layout.tsx
+++ b/src/components/Layout/Layout.tsx
@@ -8,6 +8,7 @@ import {CONTENT_WRAPPER_ID, DEFAULT_THEME, MENU_ID} from '../../constants';
 import {EnvironmentContext} from '../../contexts';
 import {useLocale} from '../../hooks/useLocale';
 import {block} from '../../utils';
+import type {JsonLd} from '../../utils/structuredData';
 import {CustomScrollbar} from '../CustomScrollbar';
 import {Footer} from '../Footer/Footer';
 import {Menu} from '../Menu/Menu';
@@ -31,6 +32,8 @@ export type LayoutProps = {
     noScroll?: boolean;
     meta?: MetaProps;
     hideLocalePicker?: boolean;
+    /** Schema.org blocks rendered as JSON-LD inside <head>. */
+    jsonLd?: JsonLd[];
 };
 
 export const Layout: React.FC<LayoutProps> = ({
@@ -43,6 +46,7 @@ export const Layout: React.FC<LayoutProps> = ({
     noScroll = false,
     hideLocalePicker = false,
     meta = {},
+    jsonLd,
 }) => {
     const locale = useLocale();
 
@@ -104,6 +108,13 @@ export const Layout: React.FC<LayoutProps> = ({
             <Head>
                 <title>{`Gravity UI${title ? ` – ${title}` : ''}`}</title>
                 <Meta {...meta} />
+                {jsonLd?.map((item, index) => (
+                    <script
+                        key={index}
+                        type="application/ld+json"
+                        dangerouslySetInnerHTML={{__html: JSON.stringify(item)}}
+                    />
+                ))}
             </Head>
             <ThemeProvider theme={DEFAULT_THEME} direction={isRtl ? 'rtl' : 'ltr'}>
                 <React.Fragment>
diff --git a/src/pages/components/[libId]/[componentId].tsx b/src/pages/components/[libId]/[componentId].tsx
index 83ca73960bd6..1ffd70ade92f 100644
--- a/src/pages/components/[libId]/[componentId].tsx
+++ b/src/pages/components/[libId]/[componentId].tsx
@@ -12,10 +12,13 @@ import {Component} from '../../../components/Component/Component';
 import {ComponentsLayout} from '../../../components/ComponentsLayout/ComponentsLayout';
 import {Layout} from '../../../components/Layout/Layout';
 import {libs} from '../../../content/components';
+import {useLocale} from '../../../hooks/useLocale';
 import {getMaintainers} from '../../../utils';
+import {getCanonicalUrlForLocale} from '../../../utils/canonical';
 import {getLibComponents} from '../../../utils/components';
 import {getI18nProps} from '../../../utils/i18next';
 import {getComponentMeta} from '../../../utils/meta';
+import {getBreadcrumbJsonLd, getTechArticleJsonLd} from '../../../utils/structuredData';
 
 export const getServerSideProps: GetServerSideProps = async (ctx) => {
     const components = getLibComponents(ctx.params?.libId as string);
@@ -72,6 +75,7 @@ export const ComponentPage = ({
     readmeContent: string;
 }) => {
     const {t} = useTranslation();
+    const locale = useLocale();
     const componentsLib = libs.find((item) => item.id === lib.config.id);
     const component = componentsLib?.components.find((item) => item.id === componentId);
 
@@ -93,6 +97,26 @@ export const ComponentPage = ({
 
     const maintainers = getMaintainers(lib, `/src/components/${component.title}`);
 
+    const componentPath = `/components/${lib.config.id}/${component.id}`;
+    const componentUrl = getCanonicalUrlForLocale(locale, componentPath);
+
+    const structuredData = [
+        getBreadcrumbJsonLd([
+            {name: t('menu_components'), url: getCanonicalUrlForLocale(locale, '/components')},
+            {
+                name: lib.config.title,
+                url: getCanonicalUrlForLocale(locale, `/components/${lib.config.id}`),
+            },
+            {name: component.title, url: componentUrl},
+        ]),
+        getTechArticleJsonLd({
+            headline: `${lib.config.title} – ${component.title}`,
+            description: componentMeta.description,
+            url: componentUrl,
+            locale,
+        }),
+    ];
+
     const sections = React.useMemo<Section[]>(() => {
         return libs.map(({id, title, components}) => {
             return {
@@ -118,6 +142,7 @@ export const ComponentPage = ({
             hideFooter
             noScroll={!isMobile}
             meta={componentMeta}
+            jsonLd={structuredData}
         >
             <ComponentsLayout libId={lib.config.id} componentId={componentId} sections={sections}>
                 <Component
diff --git a/src/pages/design/[sectionId]/[articleId].tsx b/src/pages/design/[sectionId]/[articleId].tsx
index 395956f055fe..e73c60ff8d8a 100644
--- a/src/pages/design/[sectionId]/[articleId].tsx
+++ b/src/pages/design/[sectionId]/[articleId].tsx
@@ -9,8 +9,11 @@ import {DesignArticle} from '../../../components/DesignArticle/DesignArticle';
 import {DesignLayout} from '../../../components/DesignLayout/DesignLayout';
 import {Layout} from '../../../components/Layout/Layout';
 import {sections as designSections} from '../../../content/design';
+import {useLocale} from '../../../hooks/useLocale';
+import {getCanonicalUrlForLocale} from '../../../utils/canonical';
 import {getI18nProps} from '../../../utils/i18next';
 import {getDesignArticleMeta} from '../../../utils/meta';
+import {getBreadcrumbJsonLd, getTechArticleJsonLd} from '../../../utils/structuredData';
 
 export const getServerSideProps: GetServerSideProps = async (ctx) => {
     const sectionId = ctx.params?.sectionId as string;
@@ -40,6 +43,7 @@ export const getServerSideProps: GetServerSideProps = async (ctx) => {
 
 export const ArticlePage = ({section, article}: {section: Section; article: Article}) => {
     const {i18n, t} = useTranslation();
+    const locale = useLocale();
 
     const sectionId = section.id;
     const articleId = article.id;
@@ -75,12 +79,33 @@ export const ArticlePage = ({section, article}: {section: Section; article: Arti
         };
     });
 
+    const articlePath = `/design/${sectionId}/${articleId}`;
+    const articleUrl = getCanonicalUrlForLocale(locale, articlePath);
+
+    const structuredData = [
+        getBreadcrumbJsonLd([
+            {name: t('menu_design'), url: getCanonicalUrlForLocale(locale, '/design')},
+            {
+                name: sectionTitle,
+                url: getCanonicalUrlForLocale(locale, `/design/${sectionId}`),
+            },
+            {name: articleTitle, url: articleUrl},
+        ]),
+        getTechArticleJsonLd({
+            headline: `${sectionTitle} – ${articleTitle}`,
+            description: articleMeta.description,
+            url: articleUrl,
+            locale,
+        }),
+    ];
+
     return (
         <Layout
             title={`${sectionTitle} – ${articleTitle}`}
             hideFooter
             noScroll={!isMobile}
             meta={articleMeta}
+            jsonLd={structuredData}
         >
             <DesignLayout sections={sections} sectionId={sectionId} articleId={articleId}>
                 <DesignArticle article={article} sectionId={sectionId} sections={sections} />
diff --git a/src/pages/index.tsx b/src/pages/index.tsx
index 51591f20d49a..55710f0fe9c0 100644
--- a/src/pages/index.tsx
+++ b/src/pages/index.tsx
@@ -7,6 +7,7 @@ import backgroundAsset from '../assets/background.jpg';
 import {Landing} from '../components/Landing/Landing';
 import {Layout} from '../components/Layout/Layout';
 import {getI18nProps} from '../utils/i18next';
+import {getOrganizationJsonLd, getWebSiteJsonLd} from '../utils/structuredData';
 
 export const getServerSideProps: GetServerSideProps = async (ctx) => {
     const [libs, i18nProps] = await Promise.all([
@@ -35,7 +36,8 @@ const Home = ({libs}: {libs: LibWithMetadata[]}) => {
                     type="image/jpeg"
                 />
             </Head>
-            <Layout isPageConstructor>
+            {/* Emitted on the homepage only: these describe the site as a whole, not each page. */}
+            <Layout isPageConstructor jsonLd={[getOrganizationJsonLd(), getWebSiteJsonLd()]}>
                 <Landing libs={libs} backgroundImageSrc={backgroundAsset.src} />
             </Layout>
         </>
diff --git a/src/pages/libraries/[libId]/index.tsx b/src/pages/libraries/[libId]/index.tsx
index 13cf9c575afb..6341c993b9ec 100644
--- a/src/pages/libraries/[libId]/index.tsx
+++ b/src/pages/libraries/[libId]/index.tsx
@@ -6,6 +6,8 @@ import {ServerApi} from '../../../api/server';
 import {Layout} from '../../../components/Layout/Layout';
 import {Library} from '../../../components/Library/Library';
 import {getI18nProps, getLibraryMeta, isValidLibId} from '../../../utils';
+import {SITE_URL} from '../../../utils/canonical';
+import {getSoftwareSourceCodeJsonLd} from '../../../utils/structuredData';
 
 export const getServerSideProps: GetServerSideProps = async (ctx) => {
     const libId = ctx.params?.libId as string;
@@ -33,10 +35,20 @@ export const getServerSideProps: GetServerSideProps = async (ctx) => {
 export const LibraryPage = ({lib}: {lib: LibWithFullData}) => {
     const {t} = useTranslation();
 
+    const meta = getLibraryMeta({id: lib.config.id, title: lib.config.title}, t);
+
     return (
         <Layout
             title={lib?.config.title ?? ''}
-            meta={getLibraryMeta({id: lib.config.id, title: lib.config.title}, t)}
+            meta={meta}
+            jsonLd={[
+                getSoftwareSourceCodeJsonLd({
+                    name: lib.config.title,
+                    description: meta.description,
+                    githubId: lib.config.githubId,
+                    url: `${SITE_URL}/libraries/${lib.config.id}`,
+                }),
+            ]}
         >
             <Library lib={lib} />
         </Layout>
diff --git a/src/utils/structuredData.ts b/src/utils/structuredData.ts
new file mode 100644
index 000000000000..7622c10460fa
--- /dev/null
+++ b/src/utils/structuredData.ts
@@ -0,0 +1,89 @@
+import {SITE_URL} from './canonical';
+
+const SCHEMA_CONTEXT = 'https://schema.org';
+
+/**
+ * Profiles the site itself links to, so they are authoritative rather than guessed.
+ * The npm organisation is deliberately absent: it is not linked from the site and could not
+ * be verified, and an unverified sameAs is worse than a missing one.
+ */
+const OFFICIAL_PROFILES = [
+    'https://github.com/gravity-ui',
+    'https://t.me/gravity_ui',
+    'https://www.figma.com/community/file/1271150067798118027/Gravity-UI-Design-System-(Beta)',
+];
+
+export type JsonLd = Record<string, unknown>;
+
+export const getOrganizationJsonLd = (): JsonLd => ({
+    '@context': SCHEMA_CONTEXT,
+    '@type': 'Organization',
+    name: 'Gravity UI',
+    url: `${SITE_URL}/`,
+    logo: `${SITE_URL}/favicon-512x512.png`,
+    sameAs: OFFICIAL_PROFILES,
+});
+
+export const getWebSiteJsonLd = (): JsonLd => ({
+    '@context': SCHEMA_CONTEXT,
+    '@type': 'WebSite',
+    name: 'Gravity UI',
+    url: `${SITE_URL}/`,
+    // No `potentialAction: SearchAction` on purpose: the site has no search endpoint, so
+    // declaring one would be markup that does not describe the page.
+});
+
+export const getBreadcrumbJsonLd = (items: {name: string; url: string}[]): JsonLd => ({
+    '@context': SCHEMA_CONTEXT,
+    '@type': 'BreadcrumbList',
+    itemListElement: items.map((item, index) => ({
+        '@type': 'ListItem',
+        position: index + 1,
+        name: item.name,
+        item: item.url,
+    })),
+});
+
+export const getSoftwareSourceCodeJsonLd = (params: {
+    name: string;
+    description?: string;
+    githubId: string;
+    url: string;
+}): JsonLd => {
+    const {name, description, githubId, url} = params;
+
+    return {
+        '@context': SCHEMA_CONTEXT,
+        '@type': 'SoftwareSourceCode',
+        name,
+        url,
+        codeRepository: `https://github.com/${githubId}`,
+        programmingLanguage: 'TypeScript',
+        ...(description ? {description} : {}),
+    };
+};
+
+export const getTechArticleJsonLd = (params: {
+    headline: string;
+    description?: string;
+    url: string;
+    locale: string;
+}): JsonLd => {
+    const {headline, description, url, locale} = params;
+
+    return {
+        '@context': SCHEMA_CONTEXT,
+        '@type': 'TechArticle',
+        headline,
+        url,
+        inLanguage: locale,
+        isPartOf: {
+            '@type': 'WebSite',
+            name: 'Gravity UI',
+            url: `${SITE_URL}/`,
+        },
+        // datePublished/dateModified are omitted rather than invented: the readme content is
+        // fetched from GitHub raw URLs, which carry no reliable authoring date.
+        ...(description ? {description} : {}),
+    };
+};
