diff --git a/extensions/amp-inputmask/0.1/amp-inputmask.js b/extensions/amp-inputmask/0.1/amp-inputmask.js
index 5eae06f122df..33650f48e845 100644
--- a/extensions/amp-inputmask/0.1/amp-inputmask.js
+++ b/extensions/amp-inputmask/0.1/amp-inputmask.js
@@ -16,10 +16,8 @@
 
 import {AmpEvents} from '../../../src/amp-events';
 import {TextMask} from './text-mask';
-import {isExperimentOn} from '../../../src/experiments';
 import {iterateCursor} from '../../../src/dom';
 import {listen} from '../../../src/event-helper';
-import {userAssert} from '../../../src/log';
 
 const SERVICE = 'inputmask';
 const TAG = `amp-${SERVICE}`;
@@ -29,10 +27,6 @@ export class AmpInputmaskService {
    * @param {!../../../src/service/ampdoc-impl.AmpDoc} ampdoc
    */
   constructor(ampdoc) {
-    userAssert(
-        isExperimentOn(ampdoc.win, 'amp-inputmask'),
-        'Experiment amp-inputmask is disabled');
-
     this.ampdoc = ampdoc;
 
     /** @private {!Array<!TextMask>} */
diff --git a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js
index 7062469b872c..8151bfb5bd16 100644
--- a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js
+++ b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask-date.js
@@ -17,7 +17,7 @@
 import {simulateKeyboardInteraction} from './utils';
 
 const config = describe.configure().retryOnSaucelabs().ifChrome();
-config.run('amp-inputmask', () => {
+config.skip('amp-inputmask', () => {
   describes.integration('attributes', {
     body: `
     <form method="post" action-xhr="http://localhost:8081/form/post" target="_blank">
@@ -25,7 +25,6 @@ config.run('amp-inputmask', () => {
     </form>
   `,
     extensions: ['amp-form', 'amp-inputmask'],
-    experiments: ['amp-inputmask'],
   }, env => {
     let win, doc;
 
diff --git a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js
index da322d8ac0ae..b35fd48a743d 100644
--- a/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js
+++ b/extensions/amp-inputmask/0.1/test/integration/test-integration-amp-inputmask.js
@@ -18,7 +18,7 @@ import {poll} from '../../../../../testing/iframe';
 import {simulateKeyboardInteraction} from './utils';
 
 const config = describe.configure().retryOnSaucelabs().ifChrome();
-config.run('amp-inputmask', () => {
+config.skip('amp-inputmask', () => {
   describes.integration('attributes', {
     body: `
     <form method="post" action-xhr="http://localhost:8081/form/post" target="_blank">
@@ -28,7 +28,6 @@ config.run('amp-inputmask', () => {
     </form>
   `,
     extensions: ['amp-form', 'amp-inputmask'],
-    experiments: ['amp-inputmask'],
   }, env => {
     let win, doc;
 
diff --git a/extensions/amp-inputmask/README.md b/extensions/amp-inputmask/README.md
index e6bccc4add47..9f51fd637829 100644
--- a/extensions/amp-inputmask/README.md
+++ b/extensions/amp-inputmask/README.md
@@ -23,7 +23,7 @@ limitations under the License.
   </tr>
   <tr>
     <td width="40%"><strong>Availability</strong></td>
-    <td><a href="https://www.ampproject.org/docs/reference/experimental.html">Experimental</a></td>
+    <td>Stable</td>
   </tr>
   <tr>
     <td width="40%"><strong>Required Script</strong></td>
diff --git a/tools/experiments/experiments.js b/tools/experiments/experiments.js
index a377b9701b85..ebbe697e540b 100644
--- a/tools/experiments/experiments.js
+++ b/tools/experiments/experiments.js
@@ -362,12 +362,6 @@ const EXPERIMENTS = [
     spec: 'https://github.com/ampproject/amphtml/issues/14061',
     cleanupIssue: 'https://github.com/ampproject/amphtml/issues/17161',
   },
-  {
-    id: 'amp-inputmask',
-    name: 'Enables the amp-inputmask extension enabled through amp-form',
-    spec: 'https://github.com/ampproject/amphtml/issues/12079',
-    cleanupIssue: 'https://github.com/ampproject/amphtml/issues/18630',
-  },
   {
     id: 'linker-form',
     name: 'Enables form support in linker',