diff --git a/backend/app.js b/backend/app.js
index e508616..732982a 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -54,24 +54,109 @@ app.post('/tomp3', function(req, res) {
     var date = Date.now();
     var path = audioPath;
     var audiopath = Date.now();
-    youtubedl.exec(url, ['-o', path + audiopath + ".mp3", '-x', '--audio-format', 'mp3'], {}, function(err, output) {
+    youtubedl.exec(url, ['-o', path + audiopath + ".mp3", '-x', '--audio-format', 'mp3', '--write-info-json'], {}, function(err, output) {
         if (err) {
             audiopath = "-1";
             throw err;
         }
     });
+
+    // write file info
+
+    youtubedl.getInfo(url, function(err, info) {
+        if (err) throw err;
+       
+        var size = info.size;
+        fs.writeFile("data/"+audiopath, size, function(err) {
+            if(err) {
+                return console.log(err);
+            }
+        
+            console.log("The file was saved!");
+        }); 
+      });
     var completeString = "done";
     var audiopathEncoded = encodeURIComponent(audiopath);
     res.send(audiopathEncoded);
     res.end("yes");
 });
 
+function getFileSizeMp3(name)
+{
+    var jsonPath = audioPath+name+".mp3.info.json";
+
+    if (fs.existsSync(jsonPath))
+        var obj = JSON.parse(fs.readFileSync(jsonPath, 'utf8'));
+    else
+        var obj = 0;
+    
+    return obj.filesize;
+}
+
+function getAmountDownloadedMp3(name)
+{
+    var partPath = audioPath+name+".mp3.part";
+    if (fs.existsSync(partPath))
+    {
+        const stats = fs.statSync(partPath);
+        const fileSizeInBytes = stats.size;
+        return fileSizeInBytes;
+    }
+    else
+        return 0;
+}
+
+function getFileSizeMp4(name)
+{
+    var jsonPath = videoPath+name+".info.json";
+    var filesize = 0;
+    if (fs.existsSync(jsonPath))
+    {
+        var obj = JSON.parse(fs.readFileSync(jsonPath, 'utf8'));
+        var format = obj.format.substring(0,3);
+        for (i = 0; i < obj.formats.length; i++)
+        {
+            if (obj.formats[i].format_id == format)
+            {
+                filesize = obj.formats[i].filesize;
+            }
+        }
+    }
+    
+    return filesize;
+}
+
+function getAmountDownloadedMp4(name)
+{
+    var format = getVideoFormatID(name);
+    var partPath = videoPath+name+".f"+format+".mp4.part";
+    if (fs.existsSync(partPath))
+    {
+        const stats = fs.statSync(partPath);
+        const fileSizeInBytes = stats.size;
+        return fileSizeInBytes;
+    }
+    else
+        return 0;
+}
+
+function getVideoFormatID(name)
+{
+    var jsonPath = videoPath+name+".info.json";
+    if (fs.existsSync(jsonPath))
+    {
+        var obj = JSON.parse(fs.readFileSync(jsonPath, 'utf8'));
+        var format = obj.format.substring(0,3);
+        return format;
+    }
+}
+
 app.post('/tomp4', function(req, res) {
     var url = req.body.url;
     var date = Date.now();
     var path = videoPath;
     var videopath = Date.now();
-    youtubedl.exec(url, ['-o', path + videopath + ".mp4", '-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/mp4'], {}, function(err, output) {
+    youtubedl.exec(url, ['-o', path + videopath + ".mp4", '-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/mp4', '--write-info-json'], {}, function(err, output) {
         if (err) {
             videopath = "-1";
             throw err;
@@ -88,14 +173,19 @@ app.post('/mp3fileexists', function(req, res) {
     var exists = "";
     var fullpath = audioPath + name + ".mp3";
     if (fs.existsSync(fullpath)) {
-    	exists = basePath + audioPath + name;
+    	exists = [basePath + audioPath + name, getFileSizeMp3(name)];
     }
     else
     {
-      exists = "failed";
+        var percent = 0;
+        var size = getFileSizeMp3(name);
+        var downloaded = getAmountDownloadedMp3(name);
+        if (size > 0)
+            percent = downloaded/size;
+        exists = ["failed", getFileSizeMp3(name), percent];
     }
     //console.log(exists + " " + name);
-    res.send(JSON.stringify(exists));
+    res.send(exists);
     res.end("yes");
 });
 
@@ -104,14 +194,19 @@ app.post('/mp4fileexists', function(req, res) {
     var exists = "";
     var fullpath = videoPath + name + ".mp4";
     if (fs.existsSync(fullpath)) {
-    	exists = basePath + videoPath + name;
+    	exists = [basePath + videoPath + name, getFileSizeMp4(name)];
     }
     else
     {
-      exists = "failed";
+        var percent = 0;
+        var size = getFileSizeMp4(name);
+        var downloaded = getAmountDownloadedMp4(name);
+        if (size > 0)
+            percent = downloaded/size;
+        exists = ["failed", getFileSizeMp4(name), percent];
     }
     //console.log(exists + " " + name);
-    res.send(JSON.stringify(exists));
+    res.send(exists);
     res.end("yes");
 });
 
diff --git a/backend/config/default.json b/backend/config/default.json
index c96bcfb..3f7f2c6 100644
--- a/backend/config/default.json
+++ b/backend/config/default.json
@@ -7,13 +7,15 @@
       "Encryption": {
         "use-encryption": false,
         "cert-file-path": "cert.pem",
-        "key-file-path": "privkey.pem",
-        "chain-file-path": "chain.pem"
+        "key-file-path": "privkey.pem"
       },
       "Downloader": {
         "path-base": "http://localhost:8088/",
         "path-audio": "audio/",
         "path-video": "video/"
+      },
+      "Extra": {
+        "title_top": "Youtube Downloader"
       }
     }
   }
\ No newline at end of file
diff --git a/src/app/app.component.html b/src/app/app.component.html
index e8a94be..1ede66b 100644
--- a/src/app/app.component.html
+++ b/src/app/app.component.html
@@ -33,7 +33,12 @@
 </mat-card>
 <br/>
 <div class="centered big" id="bar_div" *ngIf="downloadingfile;else nofile">
-        <mat-progress-bar mode="indeterminate"></mat-progress-bar>
+        <div *ngIf="determinateProgress;else indeterminateprogress">
+                <mat-progress-bar mode="determinate" value="{{percentDownloaded}}"></mat-progress-bar>
+        </div>
+        <ng-template #indeterminateprogress>
+                <mat-progress-bar mode="indeterminate"></mat-progress-bar>
+        </ng-template>
 </div>
 <ng-template #nofile>
 
diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index 07df85f..0735951 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -3,6 +3,7 @@ import {PostsService} from './posts.services';
 import { Observable } from 'rxjs/Observable';
 import {FormControl, Validators} from '@angular/forms';
 import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
+import {MatSnackBar} from '@angular/material';
 import 'rxjs/add/observable/of';
 import 'rxjs/add/operator/mapTo';
 import 'rxjs/add/operator/toPromise';
@@ -13,6 +14,7 @@ import 'rxjs/add/operator/toPromise';
   styleUrls: ['./app.component.css']
 })
 export class AppComponent {
+  determinateProgress: boolean = false;
   downloadingfile: boolean = false;
   audioOnly: boolean;
   urlError: boolean = false;
@@ -20,13 +22,15 @@ export class AppComponent {
   url: string = '';
   exists: string = "";
   topBarTitle: string = "Youtube Downloader";
-  constructor(private postsService: PostsService) { 
+  percentDownloaded: number;
+  constructor(private postsService: PostsService, public snackBar: MatSnackBar) { 
     this.audioOnly = true;
 
     
 
-    this.postsService.loadNavItems().subscribe(result => {
+    this.postsService.loadNavItems().subscribe(result => { // loads settings
       var backendUrl = result.YoutubeDLMaterial.Host.backendurl;
+      this.topBarTitle = result.YoutubeDLMaterial.Extra.title_top;
 
       this.postsService.path = backendUrl;
       this.postsService.startPath = backendUrl;
@@ -66,9 +70,17 @@ export class AppComponent {
   downloadHelperMp3(name: string)
   {
     this.postsService.getFileStatusMp3(name).subscribe(fileExists => {
-      this.exists = fileExists;
-      if (this.exists == "failed")
+      var exists = fileExists;
+      this.exists = exists[0];
+      if (exists[0] == "failed")
       {
+        var percent = exists[2];
+        console.log(percent);
+        if (percent > 0.30)
+        {
+          this.determinateProgress = true;
+          this.percentDownloaded = percent*100;
+        }
         setTimeout(() => this.downloadHelperMp3(name), 500);
       }
       else
@@ -82,9 +94,16 @@ export class AppComponent {
   downloadHelperMp4(name: string)
   {
     this.postsService.getFileStatusMp4(name).subscribe(fileExists => {
-      this.exists = fileExists;
-      if (this.exists == "failed")
+      var exists = fileExists;
+      this.exists = exists[0];
+      if (exists[0] == "failed")
       {
+        var percent = exists[2];
+        if (percent > 0.30)
+        {
+          this.determinateProgress = true;
+          this.percentDownloaded = percent*100;
+        }
         setTimeout(() => this.downloadHelperMp4(name), 500);
       }
       else
@@ -111,8 +130,11 @@ export class AppComponent {
           {
             this.downloadHelperMp3(this.path);
           }
+        },
+        error => { // can't access server
+          this.downloadingfile = false;
+          this.openSnackBar("Download failed!", "OK.");
         });
-        
       }
       else
       {
@@ -123,7 +145,11 @@ export class AppComponent {
           {
             this.downloadHelperMp4(this.path);
           }
-        });
+        },
+        error => { // can't access server
+          this.downloadingfile = false;
+          this.openSnackBar("Download failed!", "OK.");
+      });
       }
     }
     else
@@ -137,5 +163,11 @@ export class AppComponent {
     var re=new RegExp(strRegex);
     return re.test(str);
   }
+
+  openSnackBar(message: string, action: string) {
+    this.snackBar.open(message, action, {
+      duration: 2000,
+    });
+  }
 }
 
diff --git a/src/app/posts.services.ts b/src/app/posts.services.ts
index 7ace913..5859fed 100644
--- a/src/app/posts.services.ts
+++ b/src/app/posts.services.ts
@@ -55,12 +55,12 @@ export class PostsService {
             .map(res => res.json());
     }
 
-    getFileStatusMp3(name: string): Observable<string> {
+    getFileStatusMp3(name: string): Observable<any> {
         return this.http.post(this.path + "mp3fileexists",{name: name})
             .map(res => res.json());
     }
 
-    getFileStatusMp4(name: string): Observable<string> {
+    getFileStatusMp4(name: string): Observable<any> {
         return this.http.post(this.path + "mp4fileexists",{name: name})
             .map(res => res.json());
     }
diff --git a/src/favicon.ico b/src/favicon.ico
index 8081c7c..86ee06e 100644
Binary files a/src/favicon.ico and b/src/favicon.ico differ