diff --git a/package-lock.json b/package-lock.json
index 3dd092c..a255b75 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "bbctrl",
-  "version": "1.0.10b4",
+  "version": "1.0.10b5",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "bbctrl",
-      "version": "1.0.10b4",
+      "version": "1.0.10b5",
       "license": "GPL-3.0+",
       "dependencies": {
         "browserify": "^17.0.0",
diff --git a/package.json b/package.json
index 0610ea7..df02d86 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bbctrl",
-  "version": "1.0.10b4",
+  "version": "1.0.10b5",
   "homepage": "https://onefinitycnc.com/",
   "repository": "https://github.com/OneFinityCNC/onefinity",
   "license": "GPL-3.0+",
diff --git a/src/js/control-view.js b/src/js/control-view.js
index 856a263..d3a65d3 100644
--- a/src/js/control-view.js
+++ b/src/js/control-view.js
@@ -398,18 +398,13 @@ module.exports = {
           return;
       }
 
-      const fd = new FormData();
-
-      fd.append('gcode', file);
-
-      try {
-        await api.upload('file', fd);
-
-        this.last_file_time = undefined; // Force reload
-        this.$broadcast('gcode-reload', file.name);
-      } catch (err) {
-        api.alert('Upload failed', err)
-      }
+      SvelteComponents.showDialog("Upload", {
+        file,
+        onComplete: () => {
+          this.last_file_time = undefined; // Force reload
+          this.$broadcast('gcode-reload', file.name);
+        }
+      });
     },
 
     delete_current: function () {
@@ -530,7 +525,7 @@ module.exports = {
       this.send(JSON.stringify(data));
     },
 
-    showProbeDialog: function(probeType) {
+    showProbeDialog: function (probeType) {
       SvelteComponents.showDialog("Probe", { probeType });
     }
   },
diff --git a/src/py/bbctrl/FileHandler.py b/src/py/bbctrl/FileHandler.py
index ad6a24e..33d5eb3 100644
--- a/src/py/bbctrl/FileHandler.py
+++ b/src/py/bbctrl/FileHandler.py
@@ -1,34 +1,8 @@
-################################################################################
-#                                                                              #
-#                This file is part of the Buildbotics firmware.                #
-#                                                                              #
-#                  Copyright (c) 2015 - 2018, Buildbotics LLC                  #
-#                             All rights reserved.                             #
-#                                                                              #
-#     This file ("the software") is free software: you can redistribute it     #
-#     and/or modify it under the terms of the GNU General Public License,      #
-#      version 2 as published by the Free Software Foundation. You should      #
-#      have received a copy of the GNU General Public License, version 2       #
-#     along with the software. If not, see <http://www.gnu.org/licenses/>.     #
-#                                                                              #
-#     The software 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       #
-#               Lesser General Public License for more details.                #
-#                                                                              #
-#       You should have received a copy of the GNU Lesser General Public       #
-#                License along with the software.  If not, see                 #
-#                       <http://www.gnu.org/licenses/>.                        #
-#                                                                              #
-#                For information regarding this software email:                #
-#                  "Joseph Coffland" <joseph@buildbotics.com>                  #
-#                                                                              #
-################################################################################
-
 import os
+import tempfile
 import bbctrl
 import glob
-import html
+import tornado
 from tornado import gen
 from tornado.web import HTTPError
 
@@ -36,17 +10,32 @@ from tornado.web import HTTPError
 def safe_remove(path):
     try:
         os.unlink(path)
-    except OSError: pass
+    except OSError:
+        pass
 
 
+@tornado.web.stream_request_body
 class FileHandler(bbctrl.APIHandler):
-    def prepare(self): pass
+    def prepare(self):
+        if self.request.method == 'PUT':
+            self.request.connection.set_max_body_size(2 ** 30)
 
+            self.uploadFilename = self.request.path.split('/')[-1] \
+                .replace('\\', '/') \
+                .replace('#', '-') \
+                .replace('?', '-')
+
+            self.uploadFile = tempfile.NamedTemporaryFile("wb")
+
+    def data_received(self, data):
+        if self.request.method == 'PUT':
+            self.uploadFile.write(data)
 
     def delete_ok(self, filename):
         if not filename:
             # Delete everything
-            for path in glob.glob(self.get_upload('*')): safe_remove(path)
+            for path in glob.glob(self.get_upload('*')):
+                safe_remove(path)
             self.get_ctrl().preplanner.delete_all_plans()
             self.get_ctrl().state.clear_files()
 
@@ -57,26 +46,29 @@ class FileHandler(bbctrl.APIHandler):
             self.get_ctrl().preplanner.delete_plans(filename)
             self.get_ctrl().state.remove_file(filename)
 
-
     def put_ok(self, *args):
-        gcode = self.request.files['gcode'][0]
-        filename = os.path.basename(gcode['filename'].replace('\\', '/'))
-        filename = filename.replace('#', '-').replace('?', '-')
+        if not os.path.exists(self.get_upload()):
+            os.mkdir(self.get_upload())
 
-        if not os.path.exists(self.get_upload()): os.mkdir(self.get_upload())
+        filename = self.get_upload(self.uploadFilename).encode('utf8')
+        safe_remove(filename)
+        os.link(self.uploadFile.name, filename)
 
-        with open(self.get_upload(filename).encode('utf8'), 'wb') as f:
-            f.write(gcode['body'])
-        os.sync()
+        self.uploadFile.close()
 
-        self.get_ctrl().preplanner.invalidate(filename)
-        self.get_ctrl().state.add_file(filename)
-        self.get_log('FileHandler').info('GCode received: ' + filename)
+        del(self.uploadFile)
 
+        self.get_ctrl().preplanner.invalidate(self.uploadFilename)
+        self.get_ctrl().state.add_file(self.uploadFilename)
+        self.get_log('FileHandler').info(
+            'GCode received: ' + self.uploadFilename)
+
+        del(self.uploadFilename)
 
     @gen.coroutine
     def get(self, filename):
-        if not filename: raise HTTPError(400, 'Missing filename')
+        if not filename:
+            raise HTTPError(400, 'Missing filename')
         filename = os.path.basename(filename)
 
         try:
@@ -84,6 +76,7 @@ class FileHandler(bbctrl.APIHandler):
                 self.write(f.read())
         except Exception:
             self.get_ctrl().state.select_file('')
-            raise HTTPError(400, "Unable to read file - doesn't appear to be GCode.")
+            raise HTTPError(
+                400, "Unable to read file - doesn't appear to be GCode.")
 
         self.get_ctrl().state.select_file(filename)
diff --git a/src/svelte-components/src/dialogs/DialogHost.svelte b/src/svelte-components/src/dialogs/DialogHost.svelte
index 1a03f68..fdf7cd9 100644
--- a/src/svelte-components/src/dialogs/DialogHost.svelte
+++ b/src/svelte-components/src/dialogs/DialogHost.svelte
@@ -3,6 +3,7 @@
   import HomeMachineDialog from "$dialogs/HomeMachineDialog.svelte";
   import ProbeDialog from "$dialogs/ProbeDialog.svelte";
   import ScreenRotationDialog from "$dialogs/ScreenRotationDialog.svelte";
+  import UploadDialog from "$dialogs/UploadDialog.svelte";
 
   const HomeMachineDialogProps = writable<HomeMachineDialogPropsType>();
   type HomeMachineDialogPropsType = {
@@ -16,11 +17,17 @@
     probeType: "xyz" | "z";
   };
 
-  const ScreenRotationDialogProps = writable<ProbeDialogPropsType>();
+  const ScreenRotationDialogProps = writable<ScreenRotationDialogPropsType>();
   type ScreenRotationDialogPropsType = {
     open: boolean;
   };
 
+  const UploadDialogProps = writable<UploadDialogPropsType>();
+  type UploadDialogPropsType = {
+    open: boolean;
+    file: File;
+  };
+
   export function showDialog(
     dialog: "HomeMachine",
     props: Omit<HomeMachineDialogPropsType, "open">
@@ -31,6 +38,16 @@
     props: Omit<ProbeDialogPropsType, "open">
   );
 
+  export function showDialog(
+    dialog: "ScreenRotation",
+    props: Omit<ScreenRotationDialogPropsType, "open">
+  );
+
+  export function showDialog(
+    dialog: "Upload",
+    props: Omit<UploadDialogPropsType, "open">
+  );
+
   export function showDialog(dialog: string, props: any) {
     switch (dialog) {
       case "HomeMachine":
@@ -45,6 +62,10 @@
         ScreenRotationDialogProps.set({ ...props, open: true });
         break;
 
+      case "Upload":
+        UploadDialogProps.set({ ...props, open: true });
+        break;
+
       default:
         throw new Error(`Unknown dialog '${dialog}`);
     }
@@ -54,3 +75,4 @@
 <HomeMachineDialog {...$HomeMachineDialogProps} />
 <ProbeDialog {...$ProbeDialogProps} />
 <ScreenRotationDialog {...$ScreenRotationDialogProps} />
+<UploadDialog {...$UploadDialogProps} />
diff --git a/src/svelte-components/src/dialogs/UploadDialog.svelte b/src/svelte-components/src/dialogs/UploadDialog.svelte
new file mode 100644
index 0000000..2849ff4
--- /dev/null
+++ b/src/svelte-components/src/dialogs/UploadDialog.svelte
@@ -0,0 +1,74 @@
+<script lang="ts">
+  import Dialog, { Title, Content, Actions } from "@smui/dialog";
+  import Button, { Label } from "@smui/button";
+  import LinearProgress from "@smui/linear-progress";
+
+  export let open = false;
+  export let file: File;
+
+  let wasOpen = false;
+  let xhr;
+  let progress;
+
+  $: if (open != wasOpen) {
+    if (!wasOpen) {
+      beginUpload();
+    }
+
+    wasOpen = open;
+  }
+
+  $: if (!open) {
+    xhr = undefined;
+  }
+
+  async function beginUpload() {
+    progress = 0;
+
+    xhr = new XMLHttpRequest();
+    xhr.upload.onload = () => {
+      open = false;
+    };
+
+    xhr.upload.onerror = () => {
+      open = false;
+      alert("Upload failed.");
+    };
+
+    xhr.upload.onabort = () => {
+      open = false;
+    };
+
+    xhr.upload.onprogress = (event) => {
+      progress = event.loaded / event.total;
+    };
+
+    xhr.open("PUT", `/api/file/${encodeURIComponent(file.name)}`);
+    xhr.send(file);
+  }
+
+  function onCancel() {
+    xhr.abort();
+  }
+</script>
+
+<Dialog
+  bind:open
+  scrimClickAction=""
+  aria-labelledby="upload-dialog-title"
+  aria-describedby="upload-dialog-content"
+>
+  <Title id="upload-dialog-title">
+    Uploading {#if file}{file.name}...{/if}
+  </Title>
+
+  <Content id="upload-dialog-content">
+    <LinearProgress {progress} />
+  </Content>
+
+  <Actions>
+    <Button on:click={onCancel}>
+      <Label>Cancel</Label>
+    </Button>
+  </Actions>
+</Dialog>