diff --git a/html/src/app.js b/html/src/app.js
index c6217ccf..34a57ef4 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -15073,6 +15073,14 @@ speechSynthesis.getVoices();
             });
     };
 
+    $app.methods.addFavoriteWorld = function (ref, group) {
+        return API.addFavorite({
+            type: 'world',
+            favoriteId: ref.id,
+            tags: group.name
+        });
+    };
+
     $app.methods.addFavoriteAvatar = function (ref, group) {
         API.addFavorite({
             type: 'avatar',
@@ -19988,6 +19996,181 @@ speechSynthesis.getVoices();
         }
     };
 
+    // App: world favorite import
+
+    $app.data.worldImportDialog = {
+        visible: false,
+        loading: false,
+        progress: 0,
+        progressTotal: 0,
+        input: '',
+        worldIdList: new Set(),
+        errors: '',
+        worldImportFavoriteGroup: null,
+        importProgress: 0,
+        importProgressTotal: 0
+    };
+
+    $app.data.worldImportTable = {
+        data: [],
+        tableProps: {
+            stripe: true,
+            size: 'mini'
+        },
+        layout: 'table'
+    };
+
+    $app.methods.showWorldImportDialog = function () {
+        this.$nextTick(() => adjustDialogZ(this.$refs.avatarDialog.$el));
+        var D = this.worldImportDialog;
+        this.resetWorldImport();
+        D.visible = true;
+    };
+
+    $app.methods.processWorldImportList = async function () {
+        var D = this.worldImportDialog;
+        D.loading = true;
+        var regexWorldId =
+            /wrld_[0-9A-Fa-f]{8}-([0-9A-Fa-f]{4}-){3}[0-9A-Fa-f]{12}/g;
+        var match = [];
+        var worldIdList = new Set();
+        while ((match = regexWorldId.exec(D.input)) !== null) {
+            worldIdList.add(match[0]);
+        }
+        D.input = '';
+        D.errors = '';
+        D.progress = 0;
+        D.progressTotal = worldIdList.size;
+        var data = Array.from(worldIdList);
+        for (var i = 0; i < data.length; ++i) {
+            var worldId = data[i];
+            if (!D.visible) {
+                this.resetWorldImport();
+                return;
+            }
+            if (!D.worldIdList.has(worldId)) {
+                try {
+                    var args = await API.getWorld({
+                        worldId
+                    });
+                    this.worldImportTable.data.push(args.ref);
+                    D.worldIdList.add(worldId);
+                } catch (err) {
+                    D.errors = D.errors.concat(
+                        `WorldId: ${worldId}\n${err}\n\n`
+                    );
+                }
+            }
+            D.progress++;
+            if (D.progress === worldIdList.size) {
+                D.progress = 0;
+            }
+        }
+        D.loading = false;
+    };
+
+    $app.methods.deleteItemWorldImport = function (ref) {
+        var D = this.worldImportDialog;
+        removeFromArray(this.worldImportTable.data, ref);
+        D.worldIdList.delete(ref.id);
+    };
+
+    $app.methods.resetWorldImport = function () {
+        var D = this.worldImportDialog;
+        D.input = '';
+        D.errors = '';
+    };
+
+    $app.methods.clearWorldImportTable = function () {
+        var D = this.worldImportDialog;
+        this.worldImportTable.data = [];
+        D.worldIdList = new Set();
+    };
+
+    $app.methods.selectWorldImportGroup = function (group) {
+        var D = this.worldImportDialog;
+        D.worldImportFavoriteGroup = group;
+    };
+
+    $app.methods.importWorldImportTable = async function () {
+        var D = this.worldImportDialog;
+        D.loading = true;
+        if (!D.worldImportFavoriteGroup) {
+            return;
+        }
+
+        var data = [...this.worldImportTable.data].reverse();
+        D.importProgressTotal = data.length;
+        try {
+            for (var i = data.length - 1; i >= 0; i--) {
+                var ref = data[i];
+                await this.addFavoriteWorld(ref, D.worldImportFavoriteGroup);
+                removeFromArray(this.worldImportTable.data, ref);
+                D.worldIdList.delete(ref.id);
+                D.importProgress++;
+                if (D.importProgress === data.length) {
+                    D.importProgress = 0;
+                }
+            }
+        } catch (err) {
+            D.errors = `Name: ${ref.name}\nWorldId: ${ref.id}\n${err}\n\n`;
+        } finally {
+            D.importProgress = 0;
+            D.importProgressTotal = 0;
+            D.loading = false;
+        }
+    };
+
+    API.$on('LOGIN', function () {
+        $app.clearWorldImportTable();
+        $app.resetWorldImport();
+        $app.worldImportDialog.visible = false;
+        $app.worldImportFavoriteGroup = null;
+
+        $app.worldExportDialogVisible = false;
+        $app.worldExportFavoriteGroup = null;
+    });
+
+    // App: world favorite export
+
+    $app.data.worldExportDialogVisible = false;
+    $app.data.worldExportContent = '';
+    $app.data.worldExportFavoriteGroup = null;
+
+    $app.methods.showWorldExportDialog = function () {
+        this.worldExportFavoriteGroup = null;
+        this.updateWorldExportDialog();
+        this.worldExportDialogVisible = true;
+    };
+
+    $app.methods.updateWorldExportDialog = function () {
+        var _ = function (str) {
+            if (/[\x00-\x1f,"]/.test(str) === true) {
+                return `"${str.replace(/"/g, '""')}"`;
+            }
+            return str;
+        };
+        var lines = ['WorldID,Name'];
+        API.favoriteWorldGroups.forEach((group) => {
+            if (
+                !this.worldExportFavoriteGroup ||
+                this.worldExportFavoriteGroup === group
+            ) {
+                $app.favoriteWorlds.forEach((ref) => {
+                    if (group.key === ref.groupKey) {
+                        lines.push(`${_(ref.id)},${_(ref.name)}`);
+                    }
+                });
+            }
+        });
+        this.worldExportContent = lines.join('\n');
+    };
+
+    $app.methods.selectWorldExportGroup = function (group) {
+        this.worldExportFavoriteGroup = group;
+        this.updateWorldExportDialog();
+    };
+
     $app = new Vue($app);
     window.$app = $app;
 })();
diff --git a/html/src/index.pug b/html/src/index.pug
index f231d4af..768cd7ee 100644
--- a/html/src/index.pug
+++ b/html/src/index.pug
@@ -537,6 +537,8 @@ html
                                                 el-button(type="text" icon="el-icon-close" size="mini" @click.stop="deleteFavorite(favorite.id)" style="margin-left:5px")
                     el-tab-pane(label="Worlds")
                         el-collapse(style="border:0")
+                            el-button(size="small" @click="showWorldExportDialog") Export
+                            el-button(size="small" @click="showWorldImportDialog") Import
                             el-collapse-item(v-for="group in API.favoriteWorldGroups" :key="group.name")
                                 template(slot="title")
                                     span(v-text="group.displayName" style="font-weight:bold;font-size:14px;margin-left:10px")
@@ -2962,6 +2964,66 @@ html
                         template(v-once #default="scope")
                             span(v-text="scope.row.count")
 
+
+            //- dialog: export world list
+            el-dialog.x-dialog(:before-close="beforeDialogClose" @mousedown.native="dialogMouseDown" @mouseup.native="dialogMouseUp" :visible.sync="worldExportDialogVisible" title="World Favorites Export" width="650px")
+                el-dropdown(@click.native.stop trigger="click" size="small")
+                    el-button(size="mini")
+                        span(v-if="worldExportFavoriteGroup") {{ worldExportFavoriteGroup.displayName }} ({{ worldExportFavoriteGroup.count }}/{{ worldExportFavoriteGroup.capacity }}) #[i.el-icon-arrow-down.el-icon--right]
+                        span(v-else) All Favorites #[i.el-icon-arrow-down.el-icon--right]
+                    el-dropdown-menu(#default="dropdown")
+                        el-dropdown-item(style="display:block;margin:10px 0" @click.native="selectWorldExportGroup(null)") All Favorites
+                        template(v-for="groupAPI in API.favoriteWorldGroups" :key="groupAPI.name")
+                            el-dropdown-item(style="display:block;margin:10px 0" @click.native="selectWorldExportGroup(groupAPI)" :disabled="groupAPI.count >= groupAPI.capacity") {{ groupAPI.displayName }} ({{ groupAPI.count }}/{{ groupAPI.capacity }})
+                br
+                el-input(type="textarea" v-if="worldExportDialogVisible" v-model="worldExportContent" size="mini" rows="15" resize="none" readonly style="margin-top:15px" @click.native="$event.target.tagName === 'TEXTAREA' && $event.target.select()")
+
+            //- dialog: World import dialog
+            el-dialog.x-dialog(:before-close="beforeDialogClose" @mousedown.native="dialogMouseDown" @mouseup.native="dialogMouseUp" :visible.sync="worldImportDialog.visible" title="World Favorites Import" width="650px")
+                div(style="font-size:12px")
+                    | Enter a list of world IDs
+                el-input(type="textarea" v-model="worldImportDialog.input" size="mini" rows="10" resize="none" style="margin-top:15px")
+                el-button(size="small" @click="processWorldImportList" :disabled="!worldImportDialog.input") Process List
+                span(v-if="worldImportDialog.progress" style="margin-top:10px") Progress: {{ worldImportDialog.progress }}/{{ worldImportDialog.progressTotal }}
+                br
+                el-dropdown(@click.native.stop trigger="click" size="small")
+                    el-button(size="mini")
+                        span(v-if="worldImportDialog.worldImportFavoriteGroup") {{ worldImportDialog.worldImportFavoriteGroup.displayName }} ({{ worldImportDialog.worldImportFavoriteGroup.count }}/{{ worldImportDialog.worldImportFavoriteGroup.capacity }}) #[i.el-icon-arrow-down.el-icon--right]
+                        span(v-else) Select Group #[i.el-icon-arrow-down.el-icon--right]
+                    el-dropdown-menu(#default="dropdown")
+                        template(v-for="groupAPI in API.favoriteWorldGroups" :key="groupAPI.name")
+                            el-dropdown-item(style="display:block;margin:10px 0" @click.native="selectWorldImportGroup(groupAPI)" :disabled="groupAPI.count >= groupAPI.capacity") {{ groupAPI.displayName }} ({{ groupAPI.count }}/{{ groupAPI.capacity }})
+                el-button(size="small" @click="importWorldImportTable" style="margin:10px" :disabled="worldImportTable.data.length === 0 || !worldImportDialog.worldImportFavoriteGroup") Import Worlds
+                span(v-if="worldImportDialog.worldImportFavoriteGroup") {{ worldImportTable.data.length }} / {{ worldImportDialog.worldImportFavoriteGroup.capacity - worldImportDialog.worldImportFavoriteGroup.count }}
+                span(v-if="worldImportDialog.importProgress" style="margin:10px") Import Progress: {{ worldImportDialog.importProgress }}/{{ worldImportDialog.importProgressTotal }}
+                br
+                el-button(size="small" @click="clearWorldImportTable") Clear Table
+                br
+                template(v-if="worldImportDialog.errors")
+                    el-button(size="small" @click="worldImportDialog.errors = ''") Clear Errors
+                    h2(style="font-weight:bold;margin:0") Errors:
+                    pre(v-text="worldImportDialog.errors" style="white-space:pre-wrap;font-size:12px")
+                data-tables(v-if="worldImportDialog.visible" v-bind="worldImportTable" v-loading="worldImportDialog.loading" style="margin-top:10px")
+                    el-table-column(label="Image" width="70" prop="thumbnailImageUrl")
+                        template(v-once #default="scope")
+                            el-popover(placement="right" height="500px" trigger="hover")
+                                img.friends-list-avatar(slot="reference" v-lazy="scope.row.thumbnailImageUrl")
+                                img.friends-list-avatar(v-lazy="scope.row.imageUrl" style="height:500px;cursor:pointer" @click="openExternalLink(scope.row.imageUrl)")
+                    el-table-column(label="Name" prop="name")
+                        template(v-once #default="scope")
+                            span.x-link(v-text="scope.row.name" @click="showWorldDialog(scope.row.id)")
+                    el-table-column(label="Author" width="120" prop="authorName")
+                        template(v-once #default="scope")
+                            span.x-link(v-text="scope.row.authorName" @click="showUserDialog(scope.row.authorId)")
+                    el-table-column(label="Status" width="70" prop="releaseStatus")
+                        template(v-once #default="scope")
+                            span(v-text="scope.row.releaseStatus" v-if="scope.row.releaseStatus === 'public'" style="color:#67c23a")
+                            span(v-text="scope.row.releaseStatus" v-else-if="scope.row.releaseStatus === 'private'" style="color:#f56c6c")
+                            span(v-text="scope.row.releaseStatus" v-else)
+                    el-table-column(label="Action" width="90" align="right")
+                        template(v-once #default="scope")
+                            el-button(type="text" icon="el-icon-close" size="mini" @click="deleteItemWorldImport(scope.row)")
+
             //- dialog: open source software notice
             el-dialog.x-dialog(:before-close="beforeDialogClose" @mousedown.native="dialogMouseDown" @mouseup.native="dialogMouseUp" :visible.sync="ossDialog" title="Open Source Software Notice" width="650px")
                 div(v-if="ossDialog" style="height:350px;overflow:hidden scroll;word-break:break-all")