diff --git a/api/comment_list.go b/api/comment_list.go
index 173dfd3..52bab41 100644
--- a/api/comment_list.go
+++ b/api/comment_list.go
@@ -111,6 +111,12 @@ func commentListHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	p, err := pageGet(domain, path)
+	if err != nil {
+		bodyMarshal(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
 	commenterHex := "anonymous"
 	isModerator := false
 	if *x.CommenterToken != "anonymous" {
@@ -151,6 +157,7 @@ func commentListHandler(w http.ResponseWriter, r *http.Request) {
 		"requireIdentification": d.RequireIdentification,
 		"isFrozen":              d.State == "frozen",
 		"isModerator":           isModerator,
+		"attributes":            p,
 		"configuredOauths":      configuredOauths,
 	})
 }
diff --git a/api/comment_new.go b/api/comment_new.go
index 15f8e7b..b35eb2b 100644
--- a/api/comment_new.go
+++ b/api/comment_new.go
@@ -13,6 +13,16 @@ func commentNew(commenterHex string, domain string, path string, parentHex strin
 		return "", errorMissingField
 	}
 
+	p, err := pageGet(domain, path)
+	if err != nil {
+		logger.Errorf("cannot get page attributes: %v", err)
+		return "", errorInternal
+	}
+
+	if p.IsLocked {
+		return "", errorThreadLocked
+	}
+
 	commentHex, err := randomHex(32)
 	if err != nil {
 		return "", err
@@ -31,6 +41,10 @@ func commentNew(commenterHex string, domain string, path string, parentHex strin
 		return "", errorInternal
 	}
 
+	if err = pageNew(domain, path); err != nil {
+		return "", err
+	}
+
 	return commentHex, nil
 }
 
diff --git a/api/comment_new_test.go b/api/comment_new_test.go
index daad2ca..16b1293 100644
--- a/api/comment_new_test.go
+++ b/api/comment_new_test.go
@@ -56,3 +56,18 @@ func TestCommentNewUpvoted(t *testing.T) {
 		return
 	}
 }
+
+func TestCommentNewThreadLocked(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	pageNew("example.com", "/path.html")
+	p, _ := pageGet("example.com", "/path.html")
+	p.IsLocked = true
+	pageUpdate(p)
+
+	_, err := commentNew("temp-commenter-hex", "example.com", "/path.html", "root", "**foo**", "approved", time.Now().UTC())
+	if err == nil {
+		t.Errorf("expected error not found creating a new comment on a locked thread")
+		return
+	}
+}
diff --git a/api/errors.go b/api/errors.go
index 1b250e2..c6058a6 100644
--- a/api/errors.go
+++ b/api/errors.go
@@ -41,3 +41,4 @@ var errorSelfVote = errors.New("You cannot vote on your own comment.")
 var errorInvalidConfigFile = errors.New("Invalid config file.")
 var errorInvalidConfigValue = errors.New("Invalid config value.")
 var errorNewOwnerForbidden = errors.New("New user registrations are forbidden and closed.")
+var errorThreadLocked = errors.New("This thread is locked. You cannot add new comments.")
diff --git a/api/page.go b/api/page.go
new file mode 100644
index 0000000..01bc661
--- /dev/null
+++ b/api/page.go
@@ -0,0 +1,9 @@
+package main
+
+import ()
+
+type page struct {
+	Domain           string `json:"domain"`
+	Path             string `json:"path"`
+	IsLocked         bool   `json:"isLocked"`
+}
diff --git a/api/page_get.go b/api/page_get.go
new file mode 100644
index 0000000..d76eda2
--- /dev/null
+++ b/api/page_get.go
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"database/sql"
+)
+
+func pageGet(domain string, path string) (page, error) {
+	// path can be empty
+	if domain == "" {
+		return page{}, errorMissingField
+	}
+
+	statement := `
+		SELECT isLocked
+		FROM pages
+		WHERE domain=$1 AND path=$2;
+	`
+	row := db.QueryRow(statement, domain, path)
+
+	p := page{Domain: domain, Path: path}
+	if err := row.Scan(&p.IsLocked); err != nil {
+		if err == sql.ErrNoRows {
+			// If there haven't been any comments, there won't be a record for this
+			// page. The sane thing to do is return defaults.
+			// TODO: the defaults are hard-coded in two places: here and the schema
+			p.IsLocked = false
+		} else {
+			logger.Errorf("error scanning page: %v", err)
+			return page{}, errorInternal
+		}
+	}
+
+	return p, nil
+}
diff --git a/api/page_get_test.go b/api/page_get_test.go
new file mode 100644
index 0000000..7b58d20
--- /dev/null
+++ b/api/page_get_test.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestPageGetBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	pageNew("example.com", "/path.html")
+
+	p, err := pageGet("example.com", "/path.html")
+	if err != nil {
+		t.Errorf("unexpected error getting page: %v", err)
+		return
+	}
+
+	if p.IsLocked != false {
+		t.Errorf("expected p.IsLocked=false got %v", p.IsLocked)
+		return
+	}
+
+	if _, err := pageGet("example.com", "/path2.html"); err != nil {
+		t.Errorf("unexpected error getting page with non-existant record: %v", err)
+		return
+	}
+}
+
+func TestPageGetEmpty(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	pageNew("example.com", "")
+
+	if _, err := pageGet("example.com", ""); err != nil {
+		t.Errorf("unexpected error getting page with empty path: %v", err)
+		return
+	}
+
+	if _, err := pageGet("", "/path.html"); err == nil {
+		t.Errorf("exepected error not found when getting page with empty domain")
+		return
+	}
+}
diff --git a/api/page_new.go b/api/page_new.go
new file mode 100644
index 0000000..1db55cf
--- /dev/null
+++ b/api/page_new.go
@@ -0,0 +1,24 @@
+package main
+
+import ()
+
+func pageNew(domain string, path string) error {
+	// path can be empty
+	if domain == "" {
+		return errorMissingField
+	}
+
+	statement := `
+		INSERT INTO
+		pages  (domain, path)
+		VALUES ($1,     $2  )
+		ON CONFLICT DO NOTHING;
+	`
+	_, err := db.Exec(statement, domain, path)
+	if err != nil {
+		logger.Errorf("error inserting new page: %v", err)
+		return errorInternal
+	}
+
+	return nil
+}
diff --git a/api/page_new_test.go b/api/page_new_test.go
new file mode 100644
index 0000000..7b28166
--- /dev/null
+++ b/api/page_new_test.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestPageNewBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	if err := pageNew("example.com", "/path.html"); err != nil {
+		t.Errorf("unexpected error creating page: %v", err)
+		return
+	}
+}
+
+func TestPageNewEmpty(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	if err := pageNew("example.com", ""); err != nil {
+		t.Errorf("unexpected error creating page with empty path: %v", err)
+		return
+	}
+
+	if err := pageNew("", "/path.html"); err == nil {
+		t.Errorf("expected error not found creating page with empty domain")
+		return
+	}
+}
+
+func TestPageNewUnique(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	if err := pageNew("example.com", "/path.html"); err != nil {
+		t.Errorf("unexpected error creating page: %v", err)
+		return
+	}
+
+	// no error should be returned when trying to duplicate insert
+	if err := pageNew("example.com", "/path.html"); err != nil {
+		t.Errorf("unexpected error creating same page twice: %v", err)
+		return
+	}
+}
diff --git a/api/page_update.go b/api/page_update.go
new file mode 100644
index 0000000..2a50165
--- /dev/null
+++ b/api/page_update.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"net/http"
+)
+
+func pageUpdate(p page) error {
+	if p.Domain == "" {
+		return errorMissingField
+	}
+
+	statement := `
+		INSERT INTO
+		pages  (domain, path, isLocked)
+		VALUES ($1,     $2,   $3    )
+		ON CONFLICT (domain, path) DO
+			UPDATE SET isLocked = $3;
+	`
+	_, err := db.Exec(statement, p.Domain, p.Path, p.IsLocked)
+	if err != nil {
+		logger.Errorf("error setting page attributes: %v", err)
+		return errorInternal
+	}
+
+	return nil
+}
+
+func pageUpdateHandler(w http.ResponseWriter, r *http.Request) {
+	type request struct {
+		CommenterToken   *string `json:"commenterToken"`
+		Domain           *string `json:"domain"`
+		Path             *string `json:"path"`
+		Attributes       *page   `json:"attributes"`
+	}
+
+	var x request
+	if err := bodyUnmarshal(r, &x); err != nil {
+		bodyMarshal(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	c, err := commenterGetByCommenterToken(*x.CommenterToken)
+	if err != nil {
+		bodyMarshal(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	domain := domainStrip(*x.Domain)
+
+	isModerator, err := isDomainModerator(domain, c.Email)
+	if err != nil {
+		bodyMarshal(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	if !isModerator {
+		bodyMarshal(w, response{"success": false, "message": errorNotModerator.Error()})
+		return
+	}
+
+	(*x.Attributes).Domain = *x.Domain
+	(*x.Attributes).Path = *x.Path
+
+	if err = pageUpdate(*x.Attributes); err != nil {
+		bodyMarshal(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	bodyMarshal(w, response{"success": true})
+}
diff --git a/api/page_update_test.go b/api/page_update_test.go
new file mode 100644
index 0000000..32b36dc
--- /dev/null
+++ b/api/page_update_test.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"testing"
+	"time"
+)
+
+func TestPageUpdateBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	commenterHex, _ := commenterNew("test@example.com", "Test", "undefined", "https://example.com/photo.jpg", "google", "")
+
+	commentNew(commenterHex, "example.com", "/path.html", "root", "**foo**", "unapproved", time.Now().UTC())
+
+	p, _ := pageGet("example.com", "/path.html")
+	if p.IsLocked != false {
+		t.Errorf("expected IsLocked=false got %v", p.IsLocked)
+		return
+	}
+
+	p.IsLocked = true
+
+	if err := pageUpdate(p); err != nil {
+		t.Errorf("unexpected error updating page: %v", err)
+		return
+	}
+
+	p, _ = pageGet("example.com", "/path.html")
+	if p.IsLocked != true {
+		t.Errorf("expected IsLocked=true got %v", p.IsLocked)
+		return
+	}
+}
+
+func TestPageUpdateEmpty(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	p := page{Domain: "", Path: "", IsLocked: false}
+	if err := pageUpdate(p); err == nil {
+		t.Errorf("expected error not found updating page with empty everything")
+		return
+	}
+}
diff --git a/api/router_api.go b/api/router_api.go
index c9684c0..5199dc1 100644
--- a/api/router_api.go
+++ b/api/router_api.go
@@ -35,5 +35,7 @@ func apiRouterInit(router *mux.Router) error {
 	router.HandleFunc("/api/comment/approve", commentApproveHandler).Methods("POST")
 	router.HandleFunc("/api/comment/delete", commentDeleteHandler).Methods("POST")
 
+	router.HandleFunc("/api/page/update", pageUpdateHandler).Methods("POST")
+
 	return nil
 }
diff --git a/db/20180922181651-page-attributes.sql b/db/20180922181651-page-attributes.sql
new file mode 100644
index 0000000..f2776d5
--- /dev/null
+++ b/db/20180922181651-page-attributes.sql
@@ -0,0 +1,9 @@
+-- Introduces page attributes
+
+CREATE TABLE IF NOT EXISTS pages (
+  domain                   TEXT          NOT NULL                           ,
+  path                     TEXT          NOT NULL                           ,
+  isLocked                 BOOLEAN       NOT NULL  DEFAULT false
+);
+
+CREATE UNIQUE INDEX pagesUniqueIndex ON pages(domain, path);
diff --git a/frontend/js/commento.js b/frontend/js/commento.js
index f868d32..e6f464c 100644
--- a/frontend/js/commento.js
+++ b/frontend/js/commento.js
@@ -27,6 +27,8 @@
   var ID_LOGIN_BOX_HR = "commento-login-box-hr";
   var ID_LOGIN_BOX_OAUTH_PRETEXT = "commento-login-box-oauth-pretext";
   var ID_LOGIN_BOX_OAUTH_BUTTONS_CONTAINER = "commento-login-box-oauth-buttons-container";
+  var ID_MOD_TOOLS = "commento-mod-tools";
+  var ID_MOD_TOOLS_LOCK_BUTTON = "commento-mod-tools-lock-button";
   var ID_ERROR = "commento-error";
   var ID_LOGGED_CONTAINER = "commento-logged-container";
   var ID_COMMENTS_AREA = "commento-comments-area";
@@ -62,8 +64,9 @@
   var requireModeration = true;
   var isModerator = false;
   var isFrozen = false;
-  var chosenAnonymous = false;
   var shownSubmitButton = {"root": false};
+  var chosenAnonymous = false;
+  var isLocked = false;
   var shownReply = {};
   var configuredOauths = [];
   var loginBoxType = "signup";
@@ -336,6 +339,9 @@
       requireIdentification = resp.requireIdentification;
       isModerator = resp.isModerator;
       isFrozen = resp.isFrozen;
+
+      isLocked = resp.attributes.isLocked;
+
       comments = resp.comments;
       commenters = resp.commenters;
       configuredOauths = resp.configuredOauths;
@@ -443,7 +449,11 @@
 
     commentsArea.innerHTML = "";
 
-    append(mainArea, textareaCreate("root"));
+    if (!isLocked)
+      append(mainArea, textareaCreate("root"));
+    else
+      append(mainArea, messageCreate("This thread is locked. You cannot create new comments."));
+
     append(mainArea, commentsArea);
     append(root, mainArea);
 
@@ -715,7 +725,10 @@
       // append(options, edit); // uncomment when implemented
       append(options, downvote);
       append(options, upvote);
-      append(options, reply);
+
+      if (!isLocked)
+        append(options, reply);
+
       if (isModerator) {
         append(options, remove);
         if (comment.state == "unapproved")
@@ -1257,6 +1270,45 @@
   }
 
 
+  function pageUpdate(callback) {
+    var attributes = {
+      "isLocked": isLocked,
+    };
+
+    var json = {
+      "commenterToken": commenterTokenGet(),
+      "domain": location.host,
+      "path": location.pathname,
+      "attributes": attributes,
+    };
+
+    post(origin + "/api/page/update", json, function(resp) {
+      if (!resp.success) {
+        errorShow(resp.message);
+        return
+      }
+
+      call(callback);
+    });
+  }
+
+
+  global.threadLockToggle = function() {
+    var lock = $(ID_MOD_TOOLS_LOCK_BUTTON);
+
+    isLocked = !isLocked;
+
+    lock.disabled = true;
+    pageUpdate(function(success) {
+      lock.disabled = false;
+      if (isLocked)
+        lock.innerHTML = "Unlock Thread";
+      else
+        lock.innerHTML = "Lock Thread";
+    });
+  }
+
+
   function mainAreaCreate() {
     var mainArea = create("div");
 
@@ -1270,6 +1322,29 @@
   }
 
 
+  function modToolsCreate() {
+    var modTools = create("div");
+    var lock = create("button");
+
+    modTools.id = ID_MOD_TOOLS;
+    lock.id = ID_MOD_TOOLS_LOCK_BUTTON;
+
+    classAdd(modTools, "mod-tools");
+    classAdd(lock, "mod-tools-lock-button");
+
+    if (isLocked)
+      lock.innerHTML = "Unlock Thread";
+    else
+      lock.innerHTML = "Lock Thread";
+
+    attrSet(modTools, "style", "display: none");
+    attrSet(lock, "onclick", "threadLockToggle()");
+
+    append(modTools, lock);
+    append(root, modTools);
+  }
+
+
   global.loadCssOverride = function() {
     if (cssOverride === undefined)
       global.allShow();
@@ -1280,12 +1355,18 @@
 
   global.allShow = function() {
     var mainArea = $(ID_MAIN_AREA);
+    var modTools = $(ID_MOD_TOOLS);
     var loggedContainer = $(ID_LOGGED_CONTAINER);
     var footer = $(ID_FOOTER);
 
     attrSet(mainArea, "style", "");
+
+    if (isModerator)
+      attrSet(modTools, "style", "");
+
     if (loggedContainer)
       attrSet(loggedContainer, "style", "");
+
     attrSet(footer, "style", "");
 
     nameWidthFix();
@@ -1346,6 +1427,7 @@
 
     selfGet(function() {
       commentsGet(function() {
+        modToolsCreate();
         rootCreate(function() {
           commentsRender();
           footerLoad();
diff --git a/frontend/sass/commento-input.scss b/frontend/sass/commento-input.scss
index c3b007e..73408a4 100644
--- a/frontend/sass/commento-input.scss
+++ b/frontend/sass/commento-input.scss
@@ -177,3 +177,18 @@ textarea {
 .commento-button-margin {
   padding-bottom: 60px;
 }
+
+.commento-mod-tools-lock-button {
+  color: $gray-6;
+  background: none;
+  border: none;
+  font-weight: bold;
+  font-size: 12px;
+  text-transform: uppercase;
+  margin-left: 12px;
+  padding: 2px;
+}
+
+.commento-mod-tools-lock-button:hover {
+  cursor: pointer;
+}
diff --git a/frontend/sass/commento.scss b/frontend/sass/commento.scss
index a5a1129..3ed13c2 100644
--- a/frontend/sass/commento.scss
+++ b/frontend/sass/commento.scss
@@ -41,6 +41,18 @@
     font-weight: bold;
   }
 
+  .commento-mod-tools {
+    margin-bottom: 16px;
+  }
+
+  .commento-mod-tools::before {
+    content: "Moderators";
+    text-transform: uppercase;
+    color: $indigo-8;
+    font-size: 12px;
+    font-weight: bold;
+  }
+
   .commento-moderation-notice {
     width: 100%;
     border-radius: 4px;
@@ -87,7 +99,7 @@
     border-top: 1px solid #f0f0f0;
 
     .commento-header {
-      padding-bottom: 12px;
+      padding-bottom: 4px;
     }
 
     .commento-avatar::after {