diff --git a/internal/server/locale.go b/internal/server/locale.go
index 1caa10a..9ba4227 100644
--- a/internal/server/locale.go
+++ b/internal/server/locale.go
@@ -116,6 +116,10 @@ var _translations = map[string]map[string]string{
 		"admin.runCleanup":               "Запустить безопасную очистку",
 		"admin.downloadDiagnostics":      "Скачать диагностику",
 		"admin.vaultPrivacy":             "Содержимое файлов и операции не отображаются в диагностике.",
+		"admin.general":                  "Общие настройки",
+		"admin.serverName":               "Название сервера",
+		"admin.allowRegistration":        "Разрешить публичную регистрацию",
+		"admin.smtpConfigured":           "SMTP настраивается отдельно и пароль никогда не возвращается в форму.",
 		"user.account":                   "Моя учётная запись",
 		"user.devices":                   "Подключённые устройства",
 		"user.noDevices":                 "Устройств пока нет",
@@ -355,6 +359,10 @@ var _translations = map[string]map[string]string{
 		"admin.runCleanup":               "Run safe cleanup",
 		"admin.downloadDiagnostics":      "Download diagnostics",
 		"admin.vaultPrivacy":             "File contents and operations are not displayed in diagnostics.",
+		"admin.general":                  "General settings",
+		"admin.serverName":               "Server name",
+		"admin.allowRegistration":        "Allow public registration",
+		"admin.smtpConfigured":           "SMTP is configured separately and its password is never returned to a form.",
 		"user.account":                   "My account",
 		"user.devices":                   "Connected devices",
 		"user.noDevices":                 "No devices yet",
diff --git a/internal/server/server.go b/internal/server/server.go
index a25b99d..c6c15d0 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -39,6 +39,9 @@ func NewServer(dbPath, dataDir string, cfg *Config) (*Server, error) {
 	if cfg == nil {
 		cfg = DefaultConfig()
 	}
+	if cfg.path == "" {
+		cfg.path = filepath.Join(dataDir, "config.yml")
+	}
 	if err := cfg.normalize(); err != nil {
 		return nil, fmt.Errorf("config: %w", err)
 	}
diff --git a/internal/server/web/templates/admin_settings.html b/internal/server/web/templates/admin_settings.html
new file mode 100644
index 0000000..976317e
--- /dev/null
+++ b/internal/server/web/templates/admin_settings.html
@@ -0,0 +1,2 @@
+{{define "admin_settings"}}{{template "layout" .}}{{end}}
+{{define "content"}}<section class="admin-shell"><div class="admin-content"><p class="eyebrow">{{t .Locale "admin.settings"}}</p><h1>{{t .Locale "admin.settings"}}</h1><section class="card panel"><h2>{{t .Locale "admin.general"}}</h2><form method="post" action="/admin/action" class="stack"><input type="hidden" name="csrf_token" value="{{.CSRF}}"><input type="hidden" name="action" value="web-settings"><label>{{t .Locale "admin.serverName"}}<input name="server_name" value="{{.ServerName}}"></label><label>{{t .Locale "locale.label"}}<select name="default_locale"><option value="en" {{if eq .DefaultLocale "en"}}selected{{end}}>English</option><option value="ru" {{if eq .DefaultLocale "ru"}}selected{{end}}>Русский</option></select></label><label><input name="allow_registration" type="checkbox" {{if .AllowRegistration}}checked{{end}}>{{t .Locale "admin.allowRegistration"}}</label><label>{{t .Locale "field.password"}}<input name="password" type="password" required></label><button class="button primary">{{t .Locale "admin.saveUser"}}</button></form></section><section class="card panel"><h2>{{t .Locale "admin.smtpTitle"}}</h2><p class="muted">{{t .Locale "admin.smtpConfigured"}}</p><a class="button secondary" href="/admin/dashboard">{{t .Locale "common.back"}}</a></section></div></section>{{end}}
diff --git a/internal/server/web_admin.go b/internal/server/web_admin.go
index a4c1f7a..b39aaf6 100644
--- a/internal/server/web_admin.go
+++ b/internal/server/web_admin.go
@@ -141,6 +141,10 @@ func (s *Server) handleAdminWeb(w http.ResponseWriter, r *http.Request) {
 		s.renderWebError(w, r, http.StatusInternalServerError, "error.internal", "/admin/dashboard")
 		return
 	}
+	if page == "settings" {
+		s.renderPage(w, r, "admin_settings", data)
+		return
+	}
 	s.renderPage(w, r, "admin", data)
 }
 
@@ -330,6 +334,27 @@ func (s *Server) handleAdminWebAction(w http.ResponseWriter, r *http.Request) {
 	}
 	action := r.FormValue("action")
 	switch action {
+	case "web-settings":
+		if !s.adminReauth(r, session.SubjectID) {
+			s.renderWebError(w, r, http.StatusForbidden, "error.invalidCredentials", "/admin/settings")
+			return
+		}
+		locale := r.FormValue("default_locale")
+		if locale != "ru" && locale != "en" {
+			locale = "en"
+		}
+		s.cfg.mu.Lock()
+		s.cfg.Web.DefaultLocale = locale
+		s.cfg.Web.AllowRegistration = r.FormValue("allow_registration") == "on"
+		s.cfg.Web.ServerName = strings.TrimSpace(r.FormValue("server_name"))
+		err := s.cfg.saveLocked()
+		s.cfg.mu.Unlock()
+		if err != nil {
+			jsonInternalError(w, err)
+			return
+		}
+		s.auditLog("web_settings_updated", "", "", s.clientIP(r), "updated by administrator")
+		http.Redirect(w, r, "/admin/settings", http.StatusSeeOther)
 	case "toggle-user":
 		if !s.adminReauth(r, session.SubjectID) {
 			s.renderWebError(w, r, http.StatusForbidden, "error.invalidCredentials", "/admin/users")
diff --git a/internal/server/web_render.go b/internal/server/web_render.go
index 924bf70..c7c4e99 100644
--- a/internal/server/web_render.go
+++ b/internal/server/web_render.go
@@ -20,6 +20,7 @@ type webRenderer struct {
 type webPage struct {
 	Locale            string
 	LocalePreference  string
+	DefaultLocale     string
 	Title             string
 	ServerName        string
 	CurrentPath       string
@@ -111,7 +112,7 @@ func newWebRenderer() (*webRenderer, error) {
 		return nil, err
 	}
 	renderer := &webRenderer{templates: make(map[string]*template.Template)}
-	for _, page := range []string{"home", "login", "register", "forgot", "reset", "confirm", "message", "error", "admin_login", "dashboard", "admin", "admin_create_user", "vault_detail"} {
+	for _, page := range []string{"home", "login", "register", "forgot", "reset", "confirm", "message", "error", "admin_login", "dashboard", "admin", "admin_create_user", "vault_detail", "admin_settings"} {
 		clone, err := layout.Clone()
 		if err != nil {
 			return nil, err
@@ -139,6 +140,7 @@ func (s *Server) renderPageStatus(w http.ResponseWriter, r *http.Request, page s
 	}
 	data.Locale = s.webLocale(r)
 	data.LocalePreference = s.webLocalePreference(r)
+	data.DefaultLocale = s.cfg.Web.DefaultLocale
 	data.ServerName = s.cfg.Web.ServerName
 	data.CurrentPath = r.URL.Path
 	data.CurrentURL = r.URL.RequestURI()