diff --git a/dev/bots/docs.sh b/dev/bots/docs.sh
index 21fed4fd7e..e82ed0b1a4 100755
--- a/dev/bots/docs.sh
+++ b/dev/bots/docs.sh
@@ -115,8 +115,8 @@ function generate_docs() {
 
     # Install and activate the snippets tool, which resides in the
     # assets-for-api-docs repo:
-    # https://github.com/flutter/assets-for-api-docs/tree/master/packages/snippets
-    "$DART" pub global activate snippets 0.4.2
+    # https://github.com/flutter/assets-for-api-docs/tree/main/packages/snippets
+    "$DART" pub global activate snippets 0.4.3
 
     # This script generates a unified doc set, and creates
     # a custom index.html, placing everything into DOC_DIR.
diff --git a/dev/docs/README.md b/dev/docs/README.md
index 097097fd1a..29ad418d67 100644
--- a/dev/docs/README.md
+++ b/dev/docs/README.md
@@ -25,7 +25,7 @@ the following locations:
   * [Web Embedder](dart-ui_web/dart-ui_web-library.html)
 * [Installation](https://flutter.dev/docs/get-started/install)
 * [Codelabs](https://flutter.dev/docs/codelabs)
-* [Contributing to Flutter](https://github.com/flutter/flutter/blob/master/CONTRIBUTING.md)
+* [Contributing to Flutter](https://github.com/flutter/flutter/blob/main/CONTRIBUTING.md)
 
 ## Offline Documentation
 
diff --git a/dev/tools/create_api_docs.dart b/dev/tools/create_api_docs.dart
index 959b5c6d34..91a1b8f843 100644
--- a/dev/tools/create_api_docs.dart
+++ b/dev/tools/create_api_docs.dart
@@ -277,9 +277,13 @@ class Configurator {
 
   void _createPageFooter(Directory footerPath, Version version) {
     final String timestamp = DateFormat('yyyy-MM-dd HH:mm').format(DateTime.now());
-    final String gitBranch = FlutterInformation.instance.getBranchName();
+    String channel = FlutterInformation.instance.getBranchName();
+    // Backward compatibility: Still support running on "master", but pretend it is "main".
+    if (channel == 'master') {
+      channel = 'main';
+    }
     final String gitRevision = FlutterInformation.instance.getFlutterRevision();
-    final String gitBranchOut = gitBranch.isEmpty ? '' : '• $gitBranch';
+    final String channelOut = channel.isEmpty ? '' : '• $channel';
     footerPath.childFile('footer.html').writeAsStringSync('<script src="footer.js"></script>');
     publishRoot.childDirectory('flutter').childFile('footer.js')
       ..createSync(recursive: true)
@@ -287,11 +291,11 @@ class Configurator {
 (function() {
   var span = document.querySelector('footer>span');
   if (span) {
-    span.innerText = 'Flutter $version • $timestamp • $gitRevision $gitBranchOut';
+    span.innerText = 'Flutter $version • $timestamp • $gitRevision $channelOut';
   }
   var sourceLink = document.querySelector('a.source-link');
   if (sourceLink) {
-    sourceLink.href = sourceLink.href.replace('/master/', '/$gitRevision/');
+    sourceLink.href = sourceLink.href.replace('/main/', '/$gitRevision/');
   }
 })();
 ''');
@@ -568,7 +572,7 @@ class DartdocGenerator {
       '--link-to-source-root',
       flutterRoot.path,
       '--link-to-source-uri-template',
-      'https://github.com/flutter/flutter/blob/master/%f%#L%l%',
+      'https://github.com/flutter/flutter/blob/main/%f%#L%l%',
       '--inject-html',
       '--use-base-href',
       '--header',
diff --git a/dev/tools/test/create_api_docs_test.dart b/dev/tools/test/create_api_docs_test.dart
index 560eaef590..77c3ae4944 100644
--- a/dev/tools/test/create_api_docs_test.dart
+++ b/dev/tools/test/create_api_docs_test.dart
@@ -288,7 +288,7 @@ void main() {
             '--link-to-source-root',
             '/flutter',
             '--link-to-source-uri-template',
-            'https://github.com/flutter/flutter/blob/master/%f%#L%l%',
+            'https://github.com/flutter/flutter/blob/main/%f%#L%l%',
             '--inject-html',
             '--use-base-href',
             '--header',
@@ -372,7 +372,7 @@ void main() {
             '--link-to-source-root',
             '/flutter',
             '--link-to-source-uri-template',
-            'https://github.com/flutter/flutter/blob/master/%f%#L%l%',
+            'https://github.com/flutter/flutter/blob/main/%f%#L%l%',
             '--inject-html',
             '--use-base-href',
             '--header',
diff --git a/packages/flutter/lib/animation.dart b/packages/flutter/lib/animation.dart
index 5df986c1e1..cbff9fdceb 100644
--- a/packages/flutter/lib/animation.dart
+++ b/packages/flutter/lib/animation.dart
@@ -152,7 +152,7 @@
 ///    on flutter.dev.
 ///  * [Animations tutorial](https://flutter.dev/docs/development/ui/animations/tutorial)
 ///    on flutter.dev.
-///  * [Sample app](https://github.com/flutter/samples/tree/master/animations),
+///  * [Sample app](https://github.com/flutter/samples/tree/main/animations),
 ///    which showcases Flutter's animation features.
 ///  * [ImplicitlyAnimatedWidget] and its subclasses, which are [Widget]s that
 ///    implicitly animate changes to their properties.
diff --git a/packages/flutter/lib/src/cupertino/icons.dart b/packages/flutter/lib/src/cupertino/icons.dart
index 9d9eda6210..747e5d8cf0 100644
--- a/packages/flutter/lib/src/cupertino/icons.dart
+++ b/packages/flutter/lib/src/cupertino/icons.dart
@@ -54,7 +54,7 @@ import 'package:flutter/widgets.dart';
 /// ```
 /// {@end-tool}
 ///
-/// For versions 0.1.3 and below, see this [glyph map](https://raw.githubusercontent.com/flutter/packages/master/third_party/packages/cupertino_icons/map.png).
+/// For versions 0.1.3 and below, see this [glyph map](https://raw.githubusercontent.com/flutter/packages/main/third_party/packages/cupertino_icons/map.png).
 ///
 /// See also:
 ///
diff --git a/packages/flutter/lib/src/material/navigation_rail.dart b/packages/flutter/lib/src/material/navigation_rail.dart
index cb86709e8c..4b4a44d12f 100644
--- a/packages/flutter/lib/src/material/navigation_rail.dart
+++ b/packages/flutter/lib/src/material/navigation_rail.dart
@@ -39,7 +39,7 @@ const double _kIndicatorHeight = 32;
 /// Adaptive layouts can build different instances of the [Scaffold] in order to
 /// have a navigation rail for more horizontal layouts and a bottom navigation
 /// bar for more vertical layouts. See
-/// [the adaptive_scaffold.dart sample](https://github.com/flutter/samples/blob/master/experimental/web_dashboard/lib/src/widgets/third_party/adaptive_scaffold.dart)
+/// [the adaptive_scaffold.dart sample](https://github.com/flutter/samples/blob/main/experimental/web_dashboard/lib/src/widgets/third_party/adaptive_scaffold.dart)
 /// for an example.
 ///
 /// {@tool dartpad}
diff --git a/packages/flutter/lib/src/widgets/basic.dart b/packages/flutter/lib/src/widgets/basic.dart
index 343388d031..6dba29d498 100644
--- a/packages/flutter/lib/src/widgets/basic.dart
+++ b/packages/flutter/lib/src/widgets/basic.dart
@@ -274,7 +274,7 @@ class Directionality extends _UbiquitousInheritedWidget {
 ///
 /// ```dart
 /// Image.network(
-///   'https://raw.githubusercontent.com/flutter/assets-for-api-docs/master/packages/diagrams/assets/blend_mode_destination.jpeg',
+///   'https://raw.githubusercontent.com/flutter/assets-for-api-docs/main/packages/diagrams/assets/blend_mode_destination.jpeg',
 ///   color: const Color.fromRGBO(255, 255, 255, 0.5),
 ///   colorBlendMode: BlendMode.modulate
 /// )
diff --git a/packages/flutter/lib/src/widgets/interactive_viewer.dart b/packages/flutter/lib/src/widgets/interactive_viewer.dart
index 818ab5851a..f6d3071100 100644
--- a/packages/flutter/lib/src/widgets/interactive_viewer.dart
+++ b/packages/flutter/lib/src/widgets/interactive_viewer.dart
@@ -45,7 +45,7 @@ typedef InteractiveViewerWidgetBuilder = Widget Function(BuildContext context, Q
 /// size of the area that should be interactive.
 ///
 /// See also:
-///   * The [Flutter Gallery's transformations demo](https://github.com/flutter/gallery/blob/master/lib/demos/reference/transformations_demo.dart),
+///   * The [Flutter Gallery's transformations demo](https://github.com/flutter/gallery/blob/main/lib/demos/reference/transformations_demo.dart),
 ///     which includes the use of InteractiveViewer.
 ///   * The [flutter-go demo](https://github.com/justinmc/flutter-go), which includes robust positioning of an InteractiveViewer child
 ///     that works for all screen sizes and child sizes.