diff --git a/Source/PluginEditor.cpp b/Source/PluginEditor.cpp
index 75c7332..d4f1e8f 100644
--- a/Source/PluginEditor.cpp
+++ b/Source/PluginEditor.cpp
@@ -274,7 +274,9 @@ void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
 		if (processor.m_playposinfo.isPlaying)
 			infotext += " "+String(processor.m_playposinfo.timeInSeconds,1);
 		if (processor.m_show_technical_info)
-			infotext += " " + String(m_wavecomponent.m_image_init_count) + " " + String(m_wavecomponent.m_image_update_count);
+			infotext += " " + String(m_wavecomponent.m_image_init_count) + " " + String(m_wavecomponent.m_image_update_count)+ " ";
+		if (processor.m_offline_render_state >= 0 && processor.m_offline_render_state <= 100)
+			infotext += String(processor.m_offline_render_state)+"%";
 		m_info_label.setText(infotext, dontSendNotification);
 		m_perfmeter.repaint();
 	}
@@ -358,7 +360,8 @@ void PaulstretchpluginAudioProcessorEditor::showSettingsMenu()
 	menu.addItem(6, "Dump preset to clipboard", true, false);
 #endif
 	menu.addItem(7, "Show technical info", true, processor.m_show_technical_info);
-	menu.addItem(8, "Offline render...", true, false);
+	menu.addItem(8, "Offline render...", 
+		processor.m_offline_render_state == 200 || processor.m_offline_render_state == -1, false);
 	int r = menu.show();
 	if (r >= 200 && r < 210)
 	{
diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index c0fd391..6915e3f 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -417,8 +417,7 @@ String PaulstretchpluginAudioProcessor::offlineRender(File outputfile)
 	int numoutchans = *getIntParameter(cpi_num_outchans);
 	auto ss = std::make_shared<StretchAudioSource>(numoutchans,m_afm);
 	int blocksize = 2048;
-	int64_t outlen = 10 * getSampleRateChecked();
-	int64_t outcounter = 0;
+	
 	ss->setAudioFile(m_current_file);
 	ProcessParameters renderpars;
 	updateStretchParametersFromPluginParameters(renderpars);
@@ -438,9 +437,9 @@ String PaulstretchpluginAudioProcessor::offlineRender(File outputfile)
 	ss->setPaused(getParameter(cpi_pause_enabled));
 	ss->setSpectrumProcessOrder(m_stretch_source->getSpectrumProcessOrder());
 	ss->setFFTSize(m_fft_size_to_use);
-	ss->prepareToPlay(blocksize, getSampleRateChecked());
-	AudioBuffer<float> renderbuffer(numoutchans, blocksize);
-	
+	ss->setMainVolume(*getFloatParameter(cpi_main_volume));
+	double outsr = getSampleRateChecked();
+	ss->prepareToPlay(blocksize, outsr);
 	WavAudioFormat wavformat;
 	FileOutputStream* outstream = outputfiletouse.createOutputStream();
 	if (outstream == nullptr)
@@ -451,15 +450,25 @@ String PaulstretchpluginAudioProcessor::offlineRender(File outputfile)
 		delete outstream;
 		return "Could not create WAV writer";
 	}
-	AudioSourceChannelInfo asci(renderbuffer);
-	while (outcounter < outlen)
+	auto rendertask = [ss,writer,blocksize,numoutchans, outsr, this]()
 	{
-		ss->setMainVolume(*getFloatParameter(cpi_main_volume));
-		ss->getNextAudioBlock(asci);
-		writer->writeFromAudioSampleBuffer(renderbuffer,0,blocksize);
-		outcounter += blocksize;
-	}
-	delete writer;
+		AudioBuffer<float> renderbuffer(numoutchans, blocksize);
+		int64_t outlen = 50 * outsr;
+		int64_t outcounter = 0;
+		AudioSourceChannelInfo asci(renderbuffer);
+		m_offline_render_state = 0;
+		while (outcounter < outlen)
+		{
+			ss->getNextAudioBlock(asci);
+			writer->writeFromAudioSampleBuffer(renderbuffer, 0, blocksize);
+			outcounter += blocksize;
+			m_offline_render_state = 100.0 / outlen * outcounter;
+		}
+		m_offline_render_state = 200;
+		delete writer;
+	};
+	std::thread th(rendertask);
+	th.detach();
 	return "Rendered OK";
 }
 
diff --git a/Source/PluginProcessor.h b/Source/PluginProcessor.h
index 9f66851..8aae594 100644
--- a/Source/PluginProcessor.h
+++ b/Source/PluginProcessor.h
@@ -162,6 +162,7 @@ public:
 	ValueTree getStateTree(bool ignoreoptions, bool ignorefile);
 	void setStateFromTree(ValueTree tree);
 	String offlineRender(File outputfile);
+	std::atomic<int> m_offline_render_state{ -1 };
 	bool m_state_dirty = false;
 	std::unique_ptr<AudioThumbnail> m_thumb;
 	bool m_show_technical_info = false;