diff --git a/loadrunable.cpp b/loadrunable.cpp
index a5a4428..a12204e 100644
--- a/loadrunable.cpp
+++ b/loadrunable.cpp
@@ -517,10 +517,11 @@ bool loadImage(const QString &path, ImageInfoData &info, std::shared_ptr<RawImag
     return ret;
 }
 
-ConvertRunable::ConvertRunable(const QString &in, const QString &out, const QString &format) :
+ConvertRunable::ConvertRunable(const QString &in, const QString &out, const QString &format, const ConvertParams &params) :
     m_infile(in),
     m_outfile(out),
-    m_format(format)
+    m_format(format),
+    m_params(params)
 {
 }
 
@@ -598,6 +599,7 @@ void writeFITSImage(fitsfile *fw, std::shared_ptr<RawImage> rawimage, ImageInfoD
 
 void ConvertRunable::run()
 {
+    qDebug() << m_infile << m_outfile;
     ImageInfoData imageinfo;
     std::shared_ptr<RawImage> rawimage;
     loadImage(m_infile, imageinfo, rawimage);
@@ -646,6 +648,18 @@ void ConvertRunable::run()
                         image.addFITSKeyword({record.key.toStdString(), record.value.toString().toStdString(), record.comment.toStdString()});
                 }
 
+                if(m_params.compressionType.startsWith("zstd") && LibXISF::DataBlock::CompressionCodecSupported(LibXISF::DataBlock::ZSTD))
+                    image.setCompression(LibXISF::DataBlock::ZSTD, m_params.compressionLevel);
+                else if(m_params.compressionType.startsWith("lz4hc"))
+                    image.setCompression(LibXISF::DataBlock::LZ4HC, m_params.compressionLevel);
+                else if(m_params.compressionType.startsWith("lz4"))
+                    image.setCompression(LibXISF::DataBlock::LZ4, m_params.compressionLevel);
+                else if(m_params.compressionType.startsWith("zlib"))
+                    image.setCompression(LibXISF::DataBlock::Zlib, m_params.compressionLevel);
+
+                if(m_params.compressionType.endsWith("+sh"))
+                    image.setByteshuffling(true);
+
                 xisf.writeImage(image);
                 xisf.save(m_outfile.toLocal8Bit().data());
             }
@@ -661,6 +675,13 @@ void ConvertRunable::run()
             fitsfile *fw;
             if(QFileInfo(m_outfile).exists())QFile::remove(m_outfile);
             fits_create_diskfile(&fw, m_outfile.toLocal8Bit().data(), &status);
+            if(!m_params.compressionType.isEmpty())
+            {
+                if(m_params.compressionType == "gzip")
+                    fits_set_compression_type(fw, GZIP_1, &status);
+                else if(m_params.compressionType == "rice")
+                    fits_set_compression_type(fw, RICE_1, &status);
+            }
             writeFITSImage(fw, rawimage, imageinfo);
             fits_close_file(fw, &status);
         }
@@ -694,3 +715,12 @@ void ConvertRunable::run()
         }
     }
 }
+
+ConvertRunable::ConvertParams::ConvertParams(const QVariantMap &map)
+{
+    if(map.contains("compressionLevel"))
+        compressionLevel = map["compressionLevel"].toInt();
+
+    if(map.contains("compressionType"))
+        compressionType = map["compressionType"].toString();
+}
diff --git a/loadrunable.h b/loadrunable.h
index 9005cef..a211778 100644
--- a/loadrunable.h
+++ b/loadrunable.h
@@ -24,14 +24,24 @@ public:
     void run() override;
 };
 
+
 class ConvertRunable : public QRunnable
 {
+public:
+    struct ConvertParams
+    {
+        int compressionLevel = -1;
+        QString compressionType;
+        ConvertParams(){}
+        ConvertParams(const QVariantMap &map);
+    };
+    ConvertRunable(const QString &in, const QString &out, const QString &format, const ConvertParams &params = ConvertParams());
+    void run() override;
+private:
     QString m_infile;
     QString m_outfile;
     QString m_format;
-public:
-    ConvertRunable(const QString &in, const QString &out, const QString &format);
-    void run() override;
+    ConvertParams m_params;
 };
 
 #endif // LOADRUNABLE_H
diff --git a/scriptengine.cpp b/scriptengine.cpp
index 430d328..7542c38 100644
--- a/scriptengine.cpp
+++ b/scriptengine.cpp
@@ -66,9 +66,8 @@ bool ScriptEngine::isMarked(const File *file) const
     return _database->isMarked(file->absoluteFilePath());
 }
 
-bool ScriptEngine::convert(File *file, QString &outpath, QJSValue &params)
+bool ScriptEngine::convert(File *file, QString &outpath, QString format, QVariantMap params)
 {
-    QString format = params.toString();
     QString path;
     QDir dir(_outputDir);
     QFileInfo info(outpath);
@@ -80,7 +79,7 @@ bool ScriptEngine::convert(File *file, QString &outpath, QJSValue &params)
 
     info.setFile(path);
     //qDebug() << info.absolutePath() + "/" + info.completeBaseName() + "." + format.toLower();
-    _pool->start(new ConvertRunable(file->absoluteFilePath(), info.absolutePath() + "/" + info.completeBaseName() + "." + format.toLower(), format));
+    _pool->start(new ConvertRunable(file->absoluteFilePath(), info.absolutePath() + "/" + info.completeBaseName() + "." + format.toLower(), format, params));
     return true;
 }
 
diff --git a/scriptengine.h b/scriptengine.h
index cee99e6..50a278f 100644
--- a/scriptengine.h
+++ b/scriptengine.h
@@ -33,7 +33,7 @@ public:
     Q_INVOKABLE void mark(File *file);
     Q_INVOKABLE void unmark(File *file);
     Q_INVOKABLE bool isMarked(const File *file) const;
-    Q_INVOKABLE bool convert(File *file, QString &outpath, QJSValue &params);
+    Q_INVOKABLE bool convert(File *file, QString &outpath, QString format, QVariantMap params);
     QJSValue newObject();
 public slots:
     void run();