diff --git a/config.yaml b/config.yaml
index 1c59a90..f6fd12d 100644
--- a/config.yaml
+++ b/config.yaml
@@ -107,6 +107,18 @@ ui:
     # Setting 0 disables the hiding mechanism. Default value is 0.
     hideThresholdLines: 1000
 
+  # Display of author and committer email addresses. This does not affect the rendering of email links
+  # inside Markdown previews and footer links. The purpose of obfuscation is to prevent email scrapers
+  # from scraping email addresses, under the assumption most of the scrapers are low-effort ones.
+  #
+  # Available values:
+  # "mailto"     ... Simply place an email address into "mailto:" link.
+  # "mailto-js"  ... Render without email address, then replace with "mailto:" link using JavaScript. (default)
+  #                  Display obfuscated email address next to author / committer name if JS is unavailable.
+  # "obfuscate"  ... Display obfuscated email address next to author / committer name.
+  # "none"       ... Do not output committer / author email address at all.
+  email: "mailto-js"
+
   # You can set repository's category by creating `category` file in $GIT_DIR or
   # setting `gitweb.category` git config.
   # https://git-scm.com/docs/gitweb#Documentation/gitweb.txt-categoryorgitwebcategory
diff --git a/config/config.go b/config/config.go
index 4423fb3..5aca4ae 100644
--- a/config/config.go
+++ b/config/config.go
@@ -10,6 +10,10 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
+const (
+	defaultEmailFormat = "mailto-js"
+)
+
 var staticDirRevision string
 
 type Config struct {
@@ -49,6 +53,7 @@ type Config struct {
 			Default  string   `yaml:"default"`
 			Order    []string `yaml:"order"`
 		}
+		Email  string `yaml:"email"`
 		Footer struct {
 			Links []struct {
 				Text string `yaml:"text"`
@@ -85,6 +90,8 @@ func NewWithDefaults() *Config {
 	c.Meta.Title = "Repositories"
 	c.StaticDirRevision = staticDirRevision
 
+	c.UI.Email = defaultEmailFormat
+
 	return &c
 }
 
@@ -148,6 +155,19 @@ func (c *Config) Resolve(cwd string) error {
 		c.UI.CommitsPageSize = 30
 	}
 
+	if c.UI.Email == "" {
+		c.UI.Email = defaultEmailFormat
+	}
+
+	switch c.UI.Email {
+	case "mailto":
+	case "mailto-js":
+	case "obfuscate":
+	case "none":
+	default:
+		return fmt.Errorf("\"%s\" is not a valid email display format, choose from [mailto, mailto-js, obfuscate, none]", c.UI.Email)
+	}
+
 	if c.Server.Host == "" {
 		c.Server.Host = "localhost"
 	}
diff --git a/embed/templates/commit-signature-script.html.tmpl b/embed/templates/commit-signature-script.html.tmpl
new file mode 100644
index 0000000..5b0632b
--- /dev/null
+++ b/embed/templates/commit-signature-script.html.tmpl
@@ -0,0 +1,24 @@
+<!--
+Copyright 2026 Shota FUJI <pockawoooh@gmail.com>
+SPDX-License-Identifier: MIT
+
+JavaScript for "mailto-js" email format.
+Expects object with ".Config" field for data pipeline.
+-->
+{{ define "commit-signature-script" -}}
+{{- if eq .Config.UI.Email "mailto-js" -}}
+<script type="module">
+document.querySelectorAll("[data-signature-id-user][data-signature-id-domain]").forEach(el => {
+	const textContent = el.textContent;
+	const username = el.dataset.signatureIdUser;
+	const domain = el.dataset.signatureIdDomain;
+	if (username && domain) {
+		const a = document.createElement("a");
+		a.href = "mailto:" + username + "@" + domain;
+		a.textContent = textContent;
+		el.replaceWith(a);
+	}
+})
+</script>
+{{- end -}}
+{{- end -}}
diff --git a/embed/templates/commit-signature.html.tmpl b/embed/templates/commit-signature.html.tmpl
new file mode 100644
index 0000000..5e9d2fc
--- /dev/null
+++ b/embed/templates/commit-signature.html.tmpl
@@ -0,0 +1,26 @@
+<!--
+Copyright 2026 Shota FUJI <pockawoooh@gmail.com>
+SPDX-License-Identifier: MIT
+
+Author or committer display.
+Expects "CommitSignature" for a template pipeline.
+-->
+{{ define "commit-signature" -}}
+{{- if eq .Config.UI.Email "none" -}}
+	{{- .Signature.Name -}}
+{{- else if eq .Config.UI.Email "mailto" -}}
+	<a href="mailto:{{ .Signature.Email }}">
+		{{- .Signature.Name -}}
+	</a>
+{{- else if eq .Config.UI.Email "obfuscate" -}}
+	{{- .Signature.Name }}
+	({{- .EmailUsername -}}<span>@</span><span style="display:none">example.com<br/></span>{{- .EmailDomain -}}<span style="display:none">@example.com</span>)
+{{- else -}}
+	<span data-signature-id-user="{{- .EmailUsername -}}" data-signature-id-domain="{{- .EmailDomain -}}">
+		{{- .Signature.Name -}}
+	</span>
+	<noscript>
+		({{- .EmailUsername -}}<span>@</span><span style="display:none">example.com<br/></span>{{- .EmailDomain -}}<span style="display:none">@example.com</span>)
+	</noscript>
+{{- end -}}
+{{- end -}}
diff --git a/embed/templates/repo-commit.html.tmpl b/embed/templates/repo-commit.html.tmpl
index 7205ddb..5b30629 100644
--- a/embed/templates/repo-commit.html.tmpl
+++ b/embed/templates/repo-commit.html.tmpl
@@ -14,6 +14,7 @@ SPDX-License-Identifier: MIT
 		</title>
 		<meta name="description" content='{{ $shorthash }} in {{ .Meta.DisplayName }}' />
 		<script type="module" src="/static/convert-to-local-datetime.js?r={{ .Config.StaticDirRevision }}"></script>
+		{{ template "commit-signature-script" . }}
 	</head>
 	<body>
 		<header class="header">
@@ -39,9 +40,7 @@ SPDX-License-Identifier: MIT
 					<dl class="metadata">
 						<dt class="metadata--key">Authored by</dt>
 						<dd class="metadata--value">
-							<a href="mailto:{{ .Commit.Author.Email }}">
-								{{- .Commit.Author.Name -}}
-							</a>
+							{{ template "commit-signature" (.Meta.Signature .Config .Commit.Author) }}
 						</dd>
 						<dt class="metadata--key">Authored at</dt>
 						<dd class="metadata--value">
@@ -54,9 +53,7 @@ SPDX-License-Identifier: MIT
 						</dd>
 						<dt class="metadata--key">Committed by</dt>
 						<dd class="metadata--value">
-							<a href="mailto:{{ .Commit.Committer.Email }}">
-								{{- .Commit.Committer.Name -}}
-							</a>
+							{{ template "commit-signature" (.Meta.Signature .Config .Commit.Committer) }}
 						</dd>
 						<dt class="metadata--key">Committed at</dt>
 						<dd class="metadata--value">
diff --git a/embed/templates/repo-log-ref.html.tmpl b/embed/templates/repo-log-ref.html.tmpl
index 696a221..c095490 100644
--- a/embed/templates/repo-log-ref.html.tmpl
+++ b/embed/templates/repo-log-ref.html.tmpl
@@ -13,6 +13,7 @@ SPDX-License-Identifier: MIT
 		</title>
 		<meta name="description" content='Commit history on {{ .Meta.DisplayName }} at {{ .Meta.Ref }}' />
 		<script type="module" src="/static/convert-to-local-datetime.js?r={{ .Config.StaticDirRevision }}"></script>
+		{{ template "commit-signature-script" . }}
 	</head>
 	<body>
 		<header class="header">
@@ -36,6 +37,7 @@ SPDX-License-Identifier: MIT
 			<h1 class="log-heading">Commits at {{ .Meta.Ref }}</h1>
 			<ol class="log-list">
 				{{- $meta := .Meta -}}
+				{{- $config := .Config -}}
 				{{ range .Commits -}}
 				<li id="commit-{{ .Hash.String }}" class="commit-summary">
 					<a class="commit-summary--hash" href="/{{ $meta.DirName }}/commit/{{ .Hash.String }}">
@@ -45,9 +47,7 @@ SPDX-License-Identifier: MIT
 						{{- .Message -}}
 					</span>
 					<span class="commit-summary--author">
-						<a href="mailto:{{ .Author.Email }}">
-							{{- .Author.Name -}}
-						</a>
+						{{ template "commit-signature" ($meta.Signature $config .Author) }}
 						authored at
 						<time
 							datetime='{{ .Author.When.Format "2006-01-02T15:04:05-0700" }}'
@@ -57,9 +57,7 @@ SPDX-License-Identifier: MIT
 						</time>
 					</span>
 					<span class="commit-summary--committer">
-						<a href="mailto:{{ .Committer.Email }}">
-							{{- .Committer.Name -}}
-						</a>
+						{{ template "commit-signature" ($meta.Signature $config .Committer) }}
 						comitted at
 						<time
 							datetime='{{ .Committer.When.Format "2006-01-02T15:04:05-0700" }}'
diff --git a/embed/templates/repo-top.html.tmpl b/embed/templates/repo-top.html.tmpl
index 00e4859..ba23d7b 100644
--- a/embed/templates/repo-top.html.tmpl
+++ b/embed/templates/repo-top.html.tmpl
@@ -14,6 +14,7 @@ SPDX-License-Identifier: MIT
 		<meta name="description" content="{{ .Meta.Description }}" />
 		{{- end }}
 		<script type="module" src="/static/convert-to-local-datetime.js?r={{ .Config.StaticDirRevision }}"></script>
+		{{ template "commit-signature-script" . }}
 	</head>
 	<body>
 		<header class="header">
@@ -55,6 +56,7 @@ SPDX-License-Identifier: MIT
 					<h2 class="recent-commits--title">Recent commits</h2>
 					<ol class="recent-commits--list">
 						{{ $meta := .Meta }}
+						{{ $config := .Config }}
 						{{- range .RecentCommits }}
 							<li class="recent-commits--item commit-summary">
 								<a class="commit-summary--hash" href="/{{ $meta.DirName }}/commit/{{ .Hash.String }}">
@@ -64,9 +66,7 @@ SPDX-License-Identifier: MIT
 									{{- .Message -}}
 								</span>
 								<span class="commit-summary--committer">
-									<a href="mailto:{{ .Committer.Email }}">
-										{{- .Committer.Name -}}
-									</a>
+									{{ template "commit-signature" ($meta.Signature $config .Committer) }}
 									comitted at
 									<time
 										datetime='{{ .Committer.When.Format "2006-01-02T15:04:05-0700" }}'
diff --git a/templates/data.go b/templates/data.go
index 141d514..569ac9b 100644
--- a/templates/data.go
+++ b/templates/data.go
@@ -10,6 +10,7 @@ import (
 	"html/template"
 	"maps"
 	"slices"
+	"strings"
 
 	"github.com/bluekeyes/go-gitdiff/gitdiff"
 	"github.com/go-git/go-git/v5/plumbing"
@@ -19,6 +20,30 @@ import (
 	"github.com/pocka/legit/git"
 )
 
+// CommitSignature contains all the data needed to render signature identity (who).
+type CommitSignature struct {
+	Config    *config.Config
+	Signature *object.Signature
+}
+
+func (c CommitSignature) EmailUsername() string {
+	username, _, found := strings.Cut(c.Signature.Email, "@")
+	if !found {
+		return ""
+	}
+
+	return username
+}
+
+func (c CommitSignature) EmailDomain() string {
+	_, domain, found := strings.Cut(c.Signature.Email, "@")
+	if !found {
+		return ""
+	}
+
+	return domain
+}
+
 // RepositorySummary contains overview of a git repository.
 type RepositorySummary struct {
 	// DisplayName is a directory name without ".git" suffix.
@@ -118,6 +143,15 @@ type RepositoryMeta struct {
 	Ref string
 }
 
+// Signature returns template pipeline data for "commit-signature-" templates.
+// This method is for RepositoryMeta, because every page data contains RepositoryMeta.
+func (_ RepositoryMeta) Signature(config *config.Config, signature *object.Signature) CommitSignature {
+	return CommitSignature{
+		Config:    config,
+		Signature: signature,
+	}
+}
+
 // RepoTopData is a data object passed to "repo-top" template.
 type RepoTopData struct {
 	// Config represents a resolved config based on "config.yaml".