diff --git a/admin/tool/langimport/amd/build/search.min.js b/admin/tool/langimport/amd/build/search.min.js
new file mode 100644
index 0000000000000..9f2b1aacce2b8
--- /dev/null
+++ b/admin/tool/langimport/amd/build/search.min.js
@@ -0,0 +1,2 @@
+define ("tool_langimport/search",["exports","core/pending","core/utils"],function(a,b,c){"use strict";Object.defineProperty(a,"__esModule",{value:!0});a.default=void 0;b=function(a){return a&&a.__esModule?a:{default:a}}(b);function d(a,b){return j(a)||h(a,b)||f(a,b)||e()}function e(){throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}function f(a,b){if(!a)return;if("string"==typeof a)return g(a,b);var c=Object.prototype.toString.call(a).slice(8,-1);if("Object"===c&&a.constructor)c=a.constructor.name;if("Map"===c||"Set"===c)return Array.from(c);if("Arguments"===c||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(c))return g(a,b)}function g(a,b){if(null==b||b>a.length)b=a.length;for(var c=0,d=Array(b);c<b;c++){d[c]=a[c]}return d}function h(a,b){if("undefined"==typeof Symbol||!(Symbol.iterator in Object(a)))return;var c=[],d=!0,e=!1,f=void 0;try{for(var g=a[Symbol.iterator](),h;!(d=(h=g.next()).done);d=!0){c.push(h.value);if(b&&c.length===b)break}}catch(a){e=!0;f=a}finally{try{if(!d&&null!=g["return"])g["return"]()}finally{if(e)throw f}}return c}function j(a){if(Array.isArray(a))return a}var k={AVAILABLE_LANG_SELECT:"select",AVAILABLE_LANG_SEARCH:"[data-action=\"search\"]"},l=250;a.default={init:function init(a){var e=a.querySelector(k.AVAILABLE_LANG_SELECT),f=function(a){var c=new b.default("tool_langimport/search:filter");e.querySelectorAll("option").forEach(function(a){a.remove()});var f=a.target.value.toLowerCase(),g=JSON.parse(e.dataset.availableLanguages),h=Object.keys(g).reduce(function(a,b){if(g[b].toLowerCase().includes(f)){a[b]=g[b]}return a},[]);Object.entries(h).forEach(function(a){var b=d(a,2),c=b[0],f=b[1],g=document.createElement("option");g.value=c;g.innerText=f;e.append(g)});c.resolve()},g={};e.querySelectorAll("option").forEach(function(a){g[a.value]=a.text});e.dataset.availableLanguages=JSON.stringify(g);var h=a.querySelector(k.AVAILABLE_LANG_SEARCH);h.addEventListener("keydown",function(a){if("Enter"===a.key){a.preventDefault()}});h.addEventListener("keyup",function(a){var d=new b.default("tool_langimport/search:keyup");(0,c.debounce)(f,l)(a);setTimeout(function(){d.resolve()},l)})}};return a.default});
+//# sourceMappingURL=search.min.js.map
diff --git a/admin/tool/langimport/amd/build/search.min.js.map b/admin/tool/langimport/amd/build/search.min.js.map
new file mode 100644
index 0000000000000..d0f5f301b89b6
--- /dev/null
+++ b/admin/tool/langimport/amd/build/search.min.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["../src/search.js"],"names":["SELECTORS","AVAILABLE_LANG_SELECT","AVAILABLE_LANG_SEARCH","DEBOUNCE_TIMER","init","form","availableLangsElement","querySelector","availableLangsFilter","event","pendingPromise","Pending","querySelectorAll","forEach","option","remove","searchTerm","target","value","toLowerCase","availableLanguages","JSON","parse","dataset","filteredLanguages","Object","keys","reduce","matches","langcode","includes","entries","langname","document","createElement","innerText","append","resolve","text","stringify","availableLangsSearch","addEventListener","key","preventDefault","setTimeout"],"mappings":"wKAwBA,uD,+9BAGMA,CAAAA,CAAS,CAAG,CACdC,qBAAqB,CAAE,QADT,CAEdC,qBAAqB,CAAE,0BAFT,C,CAKZC,CAAc,CAAG,G,WAiER,CACXC,IAAI,CA3DK,QAAPA,CAAAA,IAAO,CAACC,CAAD,CAAU,IACbC,CAAAA,CAAqB,CAAGD,CAAI,CAACE,aAAL,CAAmBP,CAAS,CAACC,qBAA7B,CADX,CAGbO,CAAoB,CAAG,SAACC,CAAD,CAAW,CACpC,GAAMC,CAAAA,CAAc,CAAG,GAAIC,UAAJ,CAAY,+BAAZ,CAAvB,CAGAL,CAAqB,CAACM,gBAAtB,CAAuC,QAAvC,EAAiDC,OAAjD,CAAyD,SAACC,CAAD,CAAY,CACjEA,CAAM,CAACC,MAAP,EACH,CAFD,EAJoC,GAS9BC,CAAAA,CAAU,CAAGP,CAAK,CAACQ,MAAN,CAAaC,KAAb,CAAmBC,WAAnB,EATiB,CAU9BC,CAAkB,CAAGC,IAAI,CAACC,KAAL,CAAWhB,CAAqB,CAACiB,OAAtB,CAA8BH,kBAAzC,CAVS,CAW9BI,CAAiB,CAAGC,MAAM,CAACC,IAAP,CAAYN,CAAZ,EAAgCO,MAAhC,CAAuC,SAACC,CAAD,CAAUC,CAAV,CAAuB,CACpF,GAAIT,CAAkB,CAACS,CAAD,CAAlB,CAA6BV,WAA7B,GAA2CW,QAA3C,CAAoDd,CAApD,CAAJ,CAAqE,CACjEY,CAAO,CAACC,CAAD,CAAP,CAAoBT,CAAkB,CAACS,CAAD,CACzC,CACD,MAAOD,CAAAA,CACV,CALyB,CAKvB,EALuB,CAXU,CAmBpCH,MAAM,CAACM,OAAP,CAAeP,CAAf,EAAkCX,OAAlC,CAA0C,WAA0B,cAAxBgB,CAAwB,MAAdG,CAAc,MAC1DlB,CAAM,CAAGmB,QAAQ,CAACC,aAAT,CAAuB,QAAvB,CADiD,CAEhEpB,CAAM,CAACI,KAAP,CAAeW,CAAf,CACAf,CAAM,CAACqB,SAAP,CAAmBH,CAAnB,CACA1B,CAAqB,CAAC8B,MAAtB,CAA6BtB,CAA7B,CACH,CALD,EAOAJ,CAAc,CAAC2B,OAAf,EACH,CA9BkB,CAiCbjB,CAAkB,CAAG,EAjCR,CAkCnBd,CAAqB,CAACM,gBAAtB,CAAuC,QAAvC,EAAiDC,OAAjD,CAAyD,SAACC,CAAD,CAAY,CACjEM,CAAkB,CAACN,CAAM,CAACI,KAAR,CAAlB,CAAmCJ,CAAM,CAACwB,IAC7C,CAFD,EAGAhC,CAAqB,CAACiB,OAAtB,CAA8BH,kBAA9B,CAAmDC,IAAI,CAACkB,SAAL,CAAenB,CAAf,CAAnD,CAGA,GAAMoB,CAAAA,CAAoB,CAAGnC,CAAI,CAACE,aAAL,CAAmBP,CAAS,CAACE,qBAA7B,CAA7B,CACAsC,CAAoB,CAACC,gBAArB,CAAsC,SAAtC,CAAiD,SAAChC,CAAD,CAAW,CACxD,GAAkB,OAAd,GAAAA,CAAK,CAACiC,GAAV,CAA2B,CACvBjC,CAAK,CAACkC,cAAN,EACH,CACJ,CAJD,EAOAH,CAAoB,CAACC,gBAArB,CAAsC,OAAtC,CAA+C,SAAChC,CAAD,CAAW,CACtD,GAAMC,CAAAA,CAAc,CAAG,GAAIC,UAAJ,CAAY,8BAAZ,CAAvB,CAEA,eAASH,CAAT,CAA+BL,CAA/B,EAA+CM,CAA/C,EACAmC,UAAU,CAAC,UAAM,CACblC,CAAc,CAAC2B,OAAf,EACH,CAFS,CAEPlC,CAFO,CAGb,CAPD,CAQH,CAEc,C","sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Add search filtering of available language packs\n *\n * @module      tool_langimport/search\n * @package     tool_langimport\n * @copyright   2021 Paul Holden <paulh@moodle.com>\n * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\nimport Pending from 'core/pending';\nimport {debounce} from 'core/utils';\n\nconst SELECTORS = {\n    AVAILABLE_LANG_SELECT: 'select',\n    AVAILABLE_LANG_SEARCH: '[data-action=\"search\"]',\n};\n\nconst DEBOUNCE_TIMER = 250;\n\n/**\n * Initialize module\n *\n * @param {Element} form\n */\nconst init = (form) => {\n    const availableLangsElement = form.querySelector(SELECTORS.AVAILABLE_LANG_SELECT);\n\n    const availableLangsFilter = (event) => {\n        const pendingPromise = new Pending('tool_langimport/search:filter');\n\n        // Remove existing options.\n        availableLangsElement.querySelectorAll('option').forEach((option) => {\n            option.remove();\n        });\n\n        // Filter for matching languages.\n        const searchTerm = event.target.value.toLowerCase();\n        const availableLanguages = JSON.parse(availableLangsElement.dataset.availableLanguages);\n        const filteredLanguages = Object.keys(availableLanguages).reduce((matches, langcode) => {\n            if (availableLanguages[langcode].toLowerCase().includes(searchTerm)) {\n                matches[langcode] = availableLanguages[langcode];\n            }\n            return matches;\n        }, []);\n\n        // Re-create filtered options.\n        Object.entries(filteredLanguages).forEach(([langcode, langname]) => {\n            const option = document.createElement('option');\n            option.value = langcode;\n            option.innerText = langname;\n            availableLangsElement.append(option);\n        });\n\n        pendingPromise.resolve();\n    };\n\n    // Cache initial available language options.\n    const availableLanguages = {};\n    availableLangsElement.querySelectorAll('option').forEach((option) => {\n        availableLanguages[option.value] = option.text;\n    });\n    availableLangsElement.dataset.availableLanguages = JSON.stringify(availableLanguages);\n\n    // Register event listeners on the search element.\n    const availableLangsSearch = form.querySelector(SELECTORS.AVAILABLE_LANG_SEARCH);\n    availableLangsSearch.addEventListener('keydown', (event) => {\n        if (event.key === 'Enter') {\n            event.preventDefault();\n        }\n    });\n\n    // Debounce the event listener to allow the user to finish typing.\n    availableLangsSearch.addEventListener('keyup', (event) => {\n        const pendingPromise = new Pending('tool_langimport/search:keyup');\n\n        debounce(availableLangsFilter, DEBOUNCE_TIMER)(event);\n        setTimeout(() => {\n            pendingPromise.resolve();\n        }, DEBOUNCE_TIMER);\n    });\n};\n\nexport default {\n    init: init,\n};\n"],"file":"search.min.js"}
\ No newline at end of file
diff --git a/admin/tool/langimport/amd/src/search.js b/admin/tool/langimport/amd/src/search.js
new file mode 100644
index 0000000000000..108a8cf3e193c
--- /dev/null
+++ b/admin/tool/langimport/amd/src/search.js
@@ -0,0 +1,100 @@
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Add search filtering of available language packs
+ *
+ * @module      tool_langimport/search
+ * @package     tool_langimport
+ * @copyright   2021 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+import Pending from 'core/pending';
+import {debounce} from 'core/utils';
+
+const SELECTORS = {
+    AVAILABLE_LANG_SELECT: 'select',
+    AVAILABLE_LANG_SEARCH: '[data-action="search"]',
+};
+
+const DEBOUNCE_TIMER = 250;
+
+/**
+ * Initialize module
+ *
+ * @param {Element} form
+ */
+const init = (form) => {
+    const availableLangsElement = form.querySelector(SELECTORS.AVAILABLE_LANG_SELECT);
+
+    const availableLangsFilter = (event) => {
+        const pendingPromise = new Pending('tool_langimport/search:filter');
+
+        // Remove existing options.
+        availableLangsElement.querySelectorAll('option').forEach((option) => {
+            option.remove();
+        });
+
+        // Filter for matching languages.
+        const searchTerm = event.target.value.toLowerCase();
+        const availableLanguages = JSON.parse(availableLangsElement.dataset.availableLanguages);
+        const filteredLanguages = Object.keys(availableLanguages).reduce((matches, langcode) => {
+            if (availableLanguages[langcode].toLowerCase().includes(searchTerm)) {
+                matches[langcode] = availableLanguages[langcode];
+            }
+            return matches;
+        }, []);
+
+        // Re-create filtered options.
+        Object.entries(filteredLanguages).forEach(([langcode, langname]) => {
+            const option = document.createElement('option');
+            option.value = langcode;
+            option.innerText = langname;
+            availableLangsElement.append(option);
+        });
+
+        pendingPromise.resolve();
+    };
+
+    // Cache initial available language options.
+    const availableLanguages = {};
+    availableLangsElement.querySelectorAll('option').forEach((option) => {
+        availableLanguages[option.value] = option.text;
+    });
+    availableLangsElement.dataset.availableLanguages = JSON.stringify(availableLanguages);
+
+    // Register event listeners on the search element.
+    const availableLangsSearch = form.querySelector(SELECTORS.AVAILABLE_LANG_SEARCH);
+    availableLangsSearch.addEventListener('keydown', (event) => {
+        if (event.key === 'Enter') {
+            event.preventDefault();
+        }
+    });
+
+    // Debounce the event listener to allow the user to finish typing.
+    availableLangsSearch.addEventListener('keyup', (event) => {
+        const pendingPromise = new Pending('tool_langimport/search:keyup');
+
+        debounce(availableLangsFilter, DEBOUNCE_TIMER)(event);
+        setTimeout(() => {
+            pendingPromise.resolve();
+        }, DEBOUNCE_TIMER);
+    });
+};
+
+export default {
+    init: init,
+};
diff --git a/admin/tool/langimport/lang/en/tool_langimport.php b/admin/tool/langimport/lang/en/tool_langimport.php
index 27739eda343ba..7fddab115f69f 100644
--- a/admin/tool/langimport/lang/en/tool_langimport.php
+++ b/admin/tool/langimport/lang/en/tool_langimport.php
@@ -45,6 +45,7 @@
 $string['nolangupdateneeded'] = 'All your language packs are up to date, no update is needed';
 $string['pluginname'] = 'Language packs';
 $string['purgestringcaches'] = 'Purge string caches';
+$string['search'] = 'Search available language packs';
 $string['selectlangs'] = 'Select languages to uninstall';
 $string['uninstall'] = 'Uninstall selected language pack(s)';
 $string['uninstallconfirm'] = 'You are about to completely uninstall these language packs: <strong>{$a}</strong>. Are you sure?';
diff --git a/admin/tool/langimport/styles.css b/admin/tool/langimport/styles.css
index f23c99bc3d01e..e5a827167005b 100644
--- a/admin/tool/langimport/styles.css
+++ b/admin/tool/langimport/styles.css
@@ -3,3 +3,8 @@
     float: none;
     width: 100%;
 }
+
+#page-admin-tool-langimport-index #menuuninstalllang,
+#page-admin-tool-langimport-index #menupack {
+    height: 300px;
+}
diff --git a/admin/tool/langimport/templates/langimport.mustache b/admin/tool/langimport/templates/langimport.mustache
index 71a7515084b87..32f423965760c 100644
--- a/admin/tool/langimport/templates/langimport.mustache
+++ b/admin/tool/langimport/templates/langimport.mustache
@@ -105,6 +105,13 @@
                                 {{/toinstalloptions}}
                             </select>
                         </div>
+                        <div class="mb-3">
+                            {{< core/search_input_auto }}
+                                {{$label}}
+                                    {{#str}} search, tool_langimport {{/str}}
+                                {{/label}}
+                            {{/ core/search_input_auto }}
+                        </div>
                         <div class="form-group">
                             <input type="hidden" name="sesskey" value="{{sesskey}}">
                             <input type="submit" value="{{#str}}install, tool_langimport{{/str}}" class="btn btn-secondary">
@@ -115,3 +122,8 @@
         {{/caninstall}}
     </div>
 </div>
+{{#js}}
+    require(['tool_langimport/search'], function(search) {
+        search.init(document.querySelector('#installform'));
+    });
+{{/js}}
diff --git a/admin/tool/langimport/tests/behat/manage_langpacks.feature b/admin/tool/langimport/tests/behat/manage_langpacks.feature
index 63fcc5377faf7..6af3c4c8d3248 100644
--- a/admin/tool/langimport/tests/behat/manage_langpacks.feature
+++ b/admin/tool/langimport/tests/behat/manage_langpacks.feature
@@ -20,6 +20,16 @@ Feature: Manage language packs
     And I should see "The language pack 'en_ar' was installed."
     And I log out
 
+  @javascript
+  Scenario: Search for available language pack
+    Given I log in as "admin"
+    And I navigate to "Language > Language packs" in site administration
+    When I set the field "Search available language packs" to "pirate"
+    Then the "Available language packs" select box should not contain "es"
+    And I set the field "Available language packs" to "en_ar"
+    And I press "Install selected language pack(s)"
+    And I should see "Language pack 'en_ar' was successfully installed"
+
   Scenario: Update language pack
     Given outdated langpack 'en_ar' is installed
     And I log in as "admin"