diff --git a/src/public/javascripts/dialogs/export.js b/src/public/javascripts/dialogs/export.js
index 3e8eb396a..fc8b392be 100644
--- a/src/public/javascripts/dialogs/export.js
+++ b/src/public/javascripts/dialogs/export.js
@@ -74,7 +74,7 @@ $form.on('submit', () => {
 function exportBranch(branchId, type, format, version) {
     taskId = utils.randomString(10);
 
-    const url = utils.getHost() + `/api/notes/${branchId}/export/${type}/${format}/${version}/${taskId}`;
+    const url = utils.getUrlForDownload(`api/notes/${branchId}/export/${type}/${format}/${version}/${taskId}`);
 
     utils.download(url);
 }
diff --git a/src/public/javascripts/dialogs/note_revisions.js b/src/public/javascripts/dialogs/note_revisions.js
index 952ec04d4..8656bfe9b 100644
--- a/src/public/javascripts/dialogs/note_revisions.js
+++ b/src/public/javascripts/dialogs/note_revisions.js
@@ -102,7 +102,9 @@ async function setContentPane() {
     const $downloadButton = $('<button class="btn btn-sm btn-primary" type="button">Download</button>');
 
     $downloadButton.on('click', () => {
-        utils.download(utils.getHost() + `/api/notes/${revisionItem.noteId}/revisions/${revisionItem.noteRevisionId}/download`);
+        const url = utils.getUrlForDownload(`api/notes/${revisionItem.noteId}/revisions/${revisionItem.noteRevisionId}/download`);
+
+        utils.download(url);
     });
 
     $titleButtons.append($downloadButton);
diff --git a/src/public/javascripts/services/note_detail_book.js b/src/public/javascripts/services/note_detail_book.js
index c4445323d..09ed86bf5 100644
--- a/src/public/javascripts/services/note_detail_book.js
+++ b/src/public/javascripts/services/note_detail_book.js
@@ -185,8 +185,7 @@ class NoteDetailBook {
         }
         else if (type === 'file') {
             function getFileUrl() {
-                // electron needs absolute URL so we extract current host, port, protocol
-                return utils.getHost() + "/api/notes/" + note.noteId + "/download";
+                return utils.getUrlForDownload("api/notes/" + note.noteId + "/download");
             }
 
             const $downloadButton = $('<button class="file-download btn btn-primary" type="button">Download</button>');
diff --git a/src/public/javascripts/services/note_detail_file.js b/src/public/javascripts/services/note_detail_file.js
index 9724ac376..0a3dea656 100644
--- a/src/public/javascripts/services/note_detail_file.js
+++ b/src/public/javascripts/services/note_detail_file.js
@@ -87,8 +87,7 @@ class NoteDetailFile {
     }
 
     getFileUrl() {
-        // electron needs absolute URL so we extract current host, port, protocol
-        return utils.getHost() + "/api/notes/" + this.ctx.note.noteId + "/download";
+        return utils.getUrlForDownload("api/notes/" + this.ctx.note.noteId + "/download");
     }
 
     show() {}
diff --git a/src/public/javascripts/services/note_detail_image.js b/src/public/javascripts/services/note_detail_image.js
index d0baaaa2f..f877dce48 100644
--- a/src/public/javascripts/services/note_detail_image.js
+++ b/src/public/javascripts/services/note_detail_image.js
@@ -98,8 +98,7 @@ class NoteDetailImage {
     }
 
     getFileUrl() {
-        // electron needs absolute URL so we extract current host, port, protocol
-        return utils.getHost() + `/api/notes/${this.ctx.note.noteId}/download`;
+        return utils.getUrlForDownload(`api/notes/${this.ctx.note.noteId}/download`);
     }
 
     show() {}
diff --git a/src/public/javascripts/services/utils.js b/src/public/javascripts/services/utils.js
index 8d252f666..f5f3aafbd 100644
--- a/src/public/javascripts/services/utils.js
+++ b/src/public/javascripts/services/utils.js
@@ -214,6 +214,20 @@ async function clearBrowserCache() {
     }
 }
 
+/**
+ * @param url - should be without initial slash!!!
+ */
+function getUrlForDownload(url) {
+    if (isElectron()) {
+        // electron needs absolute URL so we extract current host, port, protocol
+        return getHost() + '/' + url;
+    }
+    else {
+        // web server can be deployed on subdomain so we need to use relative path
+        return url;
+    }
+}
+
 export default {
     reloadApp,
     parseDate,
@@ -230,7 +244,6 @@ export default {
     escapeHtml,
     stopWatch,
     formatLabel,
-    getHost,
     download,
     toObject,
     randomString,
@@ -245,5 +258,6 @@ export default {
     getMimeTypeClass,
     closeActiveDialog,
     isHtmlEmpty,
-    clearBrowserCache
+    clearBrowserCache,
+    getUrlForDownload
 };
\ No newline at end of file
diff --git a/src/public/javascripts/setup.js b/src/public/javascripts/setup.js
index 45a633dc4..e7cf7c7e1 100644
--- a/src/public/javascripts/setup.js
+++ b/src/public/javascripts/setup.js
@@ -76,12 +76,12 @@ function SetupModel() {
             }
 
             // not using server.js because it loads too many dependencies
-            $.post('/api/setup/new-document', {
+            $.post('api/setup/new-document', {
                 username: username,
                 password: password1,
                 theme: theme
             }).then(() => {
-                window.location.replace("/");
+                window.location.replace("./");
             });
         }
         else if (this.setupType() === 'sync-from-server') {
@@ -128,10 +128,10 @@ function SetupModel() {
 }
 
 async function checkOutstandingSyncs() {
-    const { stats, initialized } = await $.get('/api/sync/stats');
+    const { stats, initialized } = await $.get('api/sync/stats');
 
     if (initialized) {
-        window.location.replace("/");
+        window.location.replace("./");
     }
 
     const totalOutstandingSyncs = stats.outstandingPushes + stats.outstandingPulls;
diff --git a/src/views/setup.ejs b/src/views/setup.ejs
index 709bf618d..0a2454290 100644
--- a/src/views/setup.ejs
+++ b/src/views/setup.ejs
@@ -138,7 +138,6 @@
 </div>
 
 <script type="text/javascript">
-    const baseApiUrl = 'api/';
     const glob = {
         sourceId: ''
     };