diff --git a/.gitignore b/.gitignore
index 4ca67841..a984e33e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 /resources/_gen/
 .hugo_build.lock
 __pycache__/
+node_modules/
diff --git a/Makefile b/Makefile
index fc6dda12..eddd7b87 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 OC ?= ../oc
 # not public/: a running `hugo server` renders there, with its live-reload script
 BUILD ?= build
+# search index generator (https://pagefind.app), fetched by npx on first use
+PAGEFIND ?= npx -y pagefind@1
 # test server: the web share of barbel-lescar, mounted from the file manager (smb://barbel-lescar/web)
 DEPLOY_DIR ?= /run/user/$(shell id -u)/gvfs/smb-share:server=barbel-lescar,share=web/oldcomputers
 DEPLOY_URL ?= https://barbel.synology.me/oldcomputers/
@@ -10,9 +12,10 @@ DEPLOY_URL ?= https://barbel.synology.me/oldcomputers/
 content:       ## regenerate content/ and static/media/ from the extraction repo
 	python3 $(OC)/scripts/05_hugo.py --target $(CURDIR)
 
-build:         ## build the site into $(BUILD)/
+build:         ## build the site and its search index into $(BUILD)/
 	rm -rf $(BUILD)
 	hugo --panicOnWarning --minify -d $(BUILD)
+	$(PAGEFIND) --site $(BUILD)
 
 check: build   ## build, then verify every internal link and image
 	python3 tools/check_links.py $(BUILD)
diff --git a/README.md b/README.md
index 9a89a197..1f88b6f7 100644
--- a/README.md
+++ b/README.md
@@ -29,10 +29,19 @@ banner, date, author and summary (`summary:` in the front matter, or the text be
 `<!--more-->`, or the first lines); all posts are listed under News. Posts are never touched by
 `make content`.
 
+## Search
+
+Search runs in the visitor's browser on an index generated by [Pagefind](https://pagefind.app/)
+at the end of `make build` (fetched by `npx`, so Node.js is needed to build). The header box
+sends to `/search/`, where results can be filtered by section. Content pages are indexed
+(`data-pagefind-body` on `<main>` in `layouts/baseof.html`); lists, taxonomy pages and the
+visitor-comments tabs are not. `hugo server` has no index: use `make build` and serve `build/`
+to try the search locally.
+
 ## Usage
 
     make content   # regenerate from ../oc (OC=path to use another location)
-    make build     # build into build/
+    make build     # build into build/, with the search index
     make check     # build + verify every internal link and image
     make serve     # preview on http://localhost:1313
     make deploy    # build and copy to the test server (share must be mounted; see DEPLOY_DIR/DEPLOY_URL)
diff --git a/assets/css/main.css b/assets/css/main.css
index 1253aa73..e65dfd45 100644
--- a/assets/css/main.css
+++ b/assets/css/main.css
@@ -129,3 +129,32 @@ table { border-collapse: collapse; }
 .post-summary p:last-child { margin-bottom: 0; }
 .post-banner { display: block; width: 100%; max-height: 420px; object-fit: cover; margin: 0 0 16px; border-radius: 4px; }
 @media (max-width: 600px) { .post-summary { grid-template-columns: 1fr; } }
+
+.site-header .search { margin-left: auto; }
+.site-header .search input {
+  width: 180px;
+  max-width: 100%;
+  padding: 4px 10px;
+  border: 1px solid transparent;
+  border-radius: 14px;
+  background: rgba(255, 255, 255, 0.12);
+  color: inherit;
+  font: inherit;
+  font-size: 0.9rem;
+}
+.site-header .search input::placeholder { color: inherit; opacity: 0.6; }
+.site-header .search input:focus { outline: none; border-color: var(--accent); background: rgba(255, 255, 255, 0.2); }
+/* Pagefind result list, in the site colours */
+#search {
+  --pagefind-ui-primary: var(--accent);
+  --pagefind-ui-text: var(--text);
+  --pagefind-ui-background: var(--panel);
+  --pagefind-ui-border: var(--line);
+  --pagefind-ui-tag: var(--bg);
+  --pagefind-ui-border-width: 1px;
+  --pagefind-ui-border-radius: 4px;
+  --pagefind-ui-image-border-radius: 2px;
+  --pagefind-ui-font: inherit;
+  --pagefind-ui-scale: 0.85;
+}
+#search mark { background: none; color: inherit; font-weight: 700; }
diff --git a/content/search.md b/content/search.md
new file mode 100644
index 00000000..f3d4922b
--- /dev/null
+++ b/content/search.md
@@ -0,0 +1,4 @@
+---
+title: Search
+layout: search
+---
diff --git a/layouts/_partials/machine-header.html b/layouts/_partials/machine-header.html
index 880ff5d4..48c0d4ac 100644
--- a/layouts/_partials/machine-header.html
+++ b/layouts/_partials/machine-header.html
@@ -2,13 +2,13 @@
 {{ $m := .machine }}
 {{ $labels := dict "photos" "Photos" "adverts" "Adverts" "hardware" "Hardware" "connectors" "Connectors" "software" "Software" "emulators" "Emulators" "links" "Links" "docs" "Docs" "videos" "Videos" "comments" "Comments" }}
 <header class="machine-header">
-  <p class="crumbs">
+  <p class="crumbs" data-pagefind-ignore>
     <a href="{{ (site.GetPage "/museum").RelPermalink }}">Museum</a>
     {{ with $m.GetTerms "categories" }}{{ range first 1 . }} › <a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a>{{ end }}{{ end }}
     {{ with $m.Params.company }}{{ with site.GetPage . }} › <a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end }}{{ end }}
   </p>
   <h1>{{ with $m.Params.logo }}<img class="logo" src="{{ . }}" alt="">{{ end }}{{ $m.Title }}</h1>
-  <nav class="tabs">
+  <nav class="tabs" data-pagefind-ignore>
     <a href="{{ $m.RelPermalink }}"{{ if not $.tab }} class="active"{{ end }}>System info</a>
     {{ range $m.Params.tabs }}
     <a href="{{ $m.RelPermalink }}{{ . }}/"{{ if eq . $.tab }} class="active"{{ end }}>{{ index $labels . }}</a>
diff --git a/layouts/author/taxonomy.html b/layouts/author/taxonomy.html
index 8100d60f..ae89ec07 100644
--- a/layouts/author/taxonomy.html
+++ b/layouts/author/taxonomy.html
@@ -1,6 +1,6 @@
 {{ define "title" }}Authors · {{ site.Title }}{{ end }}
 {{ define "main" }}
-<p class="crumbs">{{ with site.GetPage "/post" }}<a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end }}</p>
+<p class="crumbs" data-pagefind-ignore>{{ with site.GetPage "/post" }}<a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end }}</p>
 <h1>Authors</h1>
 <ul class="columns">
   {{ range .Data.Terms.Alphabetical }}
diff --git a/layouts/author/term.html b/layouts/author/term.html
index 593c27d0..0987fe9c 100644
--- a/layouts/author/term.html
+++ b/layouts/author/term.html
@@ -1,6 +1,6 @@
 {{ define "title" }}Posts by {{ .Title }} · {{ site.Title }}{{ end }}
 {{ define "main" }}
-<p class="crumbs">{{ with site.GetPage "/post" }}<a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end }} › <a href="{{ .Parent.RelPermalink }}">Authors</a></p>
+<p class="crumbs" data-pagefind-ignore>{{ with site.GetPage "/post" }}<a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end }} › <a href="{{ .Parent.RelPermalink }}">Authors</a></p>
 <h1>Posts by {{ .Title }}</h1>
 <div class="posts">
   {{ range .Pages.ByDate.Reverse }}{{ partial "post-summary.html" . }}{{ end }}
diff --git a/layouts/baseof.html b/layouts/baseof.html
index 8ed81f5a..76df7a13 100644
--- a/layouts/baseof.html
+++ b/layouts/baseof.html
@@ -18,8 +18,15 @@
       <a href="{{ .URL }}"{{ if or ($current.IsMenuCurrent .Menu .) ($current.HasMenuCurrent .Menu .) (eq $current.Section .Page.Section) }} class="active"{{ end }}>{{ .Name }}</a>
       {{ end }}
     </nav>
+    <form class="search" role="search" action="{{ "search/" | relURL }}" method="get">
+      <input type="search" name="q" placeholder="Search…" aria-label="Search the site">
+    </form>
   </header>
-  <main>
+  {{/* search index: content pages only (not lists), filterable by section; see layouts/search.html */}}
+  {{ $indexed := and .IsPage (ne .Layout "search") (ne .Params.tab "comments") }}
+  {{ $section := "" }}{{ with .FirstSection }}{{ if not .IsHome }}{{ $section = .Title }}{{ end }}{{ end }}
+  {{ if eq .Section "machine-tabs" }}{{ $section = "Museum" }}{{ end }}
+  <main{{ if $indexed }} data-pagefind-body{{ with $section }} data-pagefind-filter="Section:{{ . }}"{{ end }}{{ end }}>
     {{ block "main" . }}{{ end }}
   </main>
   <footer class="site-footer">
diff --git a/layouts/companies/single.html b/layouts/companies/single.html
index 65d3c910..09ebab97 100644
--- a/layouts/companies/single.html
+++ b/layouts/companies/single.html
@@ -1,6 +1,6 @@
 {{ define "main" }}
 <article>
-  <p class="crumbs"><a href="{{ .Parent.RelPermalink }}">Companies</a></p>
+  <p class="crumbs" data-pagefind-ignore><a href="{{ .Parent.RelPermalink }}">Companies</a></p>
   <h1>{{ with .Params.logo }}<img class="logo" src="{{ . }}" alt="">{{ end }}{{ .Title }}</h1>
   <div class="content">{{ .Content }}</div>
   {{ with .Params.machines }}
diff --git a/layouts/history/single.html b/layouts/history/single.html
index 842ffeea..60edad2e 100644
--- a/layouts/history/single.html
+++ b/layouts/history/single.html
@@ -1,10 +1,10 @@
 {{ define "main" }}
 <article>
-  <p class="crumbs"><a href="{{ .Parent.RelPermalink }}">History</a>{{ with .GetTerms "topics" }} › {{ partial "terms.html" (dict "page" $ "taxonomy" "topics") }}{{ end }}</p>
+  <p class="crumbs" data-pagefind-ignore><a href="{{ .Parent.RelPermalink }}">History</a>{{ with .GetTerms "topics" }} › {{ partial "terms.html" (dict "page" $ "taxonomy" "topics") }}{{ end }}</p>
   <h1>{{ .Title }}</h1>
   {{ with .Params.when }}<p class="meta">{{ . }}</p>{{ end }}
   <div class="content">{{ .Content }}</div>
-  <nav class="prev-next">
+  <nav class="prev-next" data-pagefind-ignore>
     {{ with .PrevInSection }}<a href="{{ .RelPermalink }}">← {{ .Title }}</a>{{ end }}
     {{ with .NextInSection }}<a href="{{ .RelPermalink }}">{{ .Title }} →</a>{{ end }}
   </nav>
diff --git a/layouts/machine-tabs/single.html b/layouts/machine-tabs/single.html
index f08ddeba..8ed82c2d 100644
--- a/layouts/machine-tabs/single.html
+++ b/layouts/machine-tabs/single.html
@@ -3,7 +3,7 @@
 {{ $m := site.GetPage .Params.machine }}
 {{ $tab := .Params.tab }}
 {{ $p := $m.Params }}
-<article class="machine">
+<article class="machine" data-pagefind-meta="title:{{ .Title }} – {{ .Params.tab | title }}">
   {{ partial "machine-header.html" (dict "machine" $m "tab" $tab) }}
 
   {{ if in (slice "photos" "adverts" "hardware" "connectors") $tab }}
diff --git a/layouts/post/single.html b/layouts/post/single.html
index d3c1678d..894d2b26 100644
--- a/layouts/post/single.html
+++ b/layouts/post/single.html
@@ -1,11 +1,11 @@
 {{ define "main" }}
 <article class="post">
-  <p class="crumbs"><a href="{{ .Parent.RelPermalink }}">{{ .Parent.Title }}</a></p>
+  <p class="crumbs" data-pagefind-ignore><a href="{{ .Parent.RelPermalink }}">{{ .Parent.Title }}</a></p>
   <h1>{{ .Title }}</h1>
   <p class="meta">{{ if not .Date.IsZero }}<time datetime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "2 January 2006" }}</time>{{ end }}{{ with .GetTerms "author" }}{{ if not $.Date.IsZero }} · {{ end }}{{ partial "terms.html" (dict "page" $ "taxonomy" "author") }}{{ end }}</p>
   {{ with partial "banner.html" (dict "page" . "width" 1000) }}<img class="post-banner" src="{{ . }}" alt="">{{ end }}
   <div class="content">{{ .Content }}</div>
-  <nav class="prev-next">
+  <nav class="prev-next" data-pagefind-ignore>
     {{ with .PrevInSection }}<a href="{{ .RelPermalink }}">← {{ .Title }}</a>{{ end }}
     {{ with .NextInSection }}<a href="{{ .RelPermalink }}">{{ .Title }} →</a>{{ end }}
   </nav>
diff --git a/layouts/search.html b/layouts/search.html
new file mode 100644
index 00000000..97573e32
--- /dev/null
+++ b/layouts/search.html
@@ -0,0 +1,31 @@
+{{ define "main" }}
+<h1>{{ .Title }}</h1>
+<div id="search"></div>
+<noscript><p>Searching needs JavaScript.</p></noscript>
+<p id="search-missing" class="note" hidden>The search index is not available in this preview: it is generated by <code>make build</code>.</p>
+<link rel="stylesheet" href="{{ "pagefind/pagefind-ui.css" | relURL }}">
+<script src="{{ "pagefind/pagefind-ui.js" | relURL }}"></script>
+<script>
+  if (window.PagefindUI) {
+    // the site may live in a sub-directory: its root is the parent of this page
+    const root = new URL("..", location.href).pathname;
+    const ui = new PagefindUI({
+      element: "#search",
+      baseUrl: root,
+      showSubResults: false,
+      pageSize: 10,
+      // images are stored with page-relative addresses: make them absolute
+      processResult: (result) => {
+        if (result.meta && result.meta.image) {
+          result.meta.image = new URL(result.meta.image, new URL(result.url, location.href)).pathname;
+        }
+        return result;
+      },
+    });
+    const q = new URLSearchParams(location.search).get("q");
+    if (q) ui.triggerSearch(q);
+  } else {
+    document.getElementById("search-missing").hidden = false;
+  }
+</script>
+{{ end }}
diff --git a/layouts/single.html b/layouts/single.html
index 419ac9eb..9652aa23 100644
--- a/layouts/single.html
+++ b/layouts/single.html
@@ -1,6 +1,6 @@
 {{ define "main" }}
 <article>
-  {{ with .Parent }}{{ if not .IsHome }}<p class="crumbs"><a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ with $.Params.group }} › {{ . }}{{ end }}</p>{{ end }}{{ end }}
+  {{ with .Parent }}{{ if not .IsHome }}<p class="crumbs" data-pagefind-ignore><a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ with $.Params.group }} › {{ . }}{{ end }}</p>{{ end }}{{ end }}
   <h1>{{ .Title }}</h1>
   <div class="content">{{ .Content }}</div>
 </article>
diff --git a/layouts/software/single.html b/layouts/software/single.html
index 66585eb3..febff685 100644
--- a/layouts/software/single.html
+++ b/layouts/software/single.html
@@ -1,6 +1,6 @@
 {{ define "main" }}
 <article>
-  <p class="crumbs"><a href="{{ .Parent.RelPermalink }}">Software</a></p>
+  <p class="crumbs" data-pagefind-ignore><a href="{{ .Parent.RelPermalink }}">Software</a></p>
   <h1>{{ .Title }}</h1>
   <div class="content">{{ .Content }}</div>
   {{ with .Params.specs }}{{ partial "specs.html" . }}{{ end }}
diff --git a/layouts/term.html b/layouts/term.html
index 0816be6b..aa6b6cd5 100644
--- a/layouts/term.html
+++ b/layouts/term.html
@@ -1,5 +1,5 @@
 {{ define "main" }}
-<p class="crumbs"><a href="{{ .Parent.RelPermalink }}">By {{ partial "taxonomy-label.html" .Data.Singular }}</a></p>
+<p class="crumbs" data-pagefind-ignore><a href="{{ .Parent.RelPermalink }}">By {{ partial "taxonomy-label.html" .Data.Singular }}</a></p>
 <h1>{{ .Title }}</h1>
 {{ range .Pages.GroupBy "Section" }}
 <h2>{{ with site.GetPage (printf "/%s" .Key) }}{{ .Title }}{{ end }} <small>({{ len .Pages }})</small></h2>