diff --git a/Device/IO/DataFormatUtil.cpp b/Device/IO/DataFormatUtil.cpp
index 5bd1fcba51e7a22229998c0e69bc9055c213b3e2..555ce29bf8109f72e98eace7cb1c75dae9c211a7 100644
--- a/Device/IO/DataFormatUtil.cpp
+++ b/Device/IO/DataFormatUtil.cpp
@@ -75,22 +75,6 @@ bool DataUtil::Format::isBZipped(const std::string& name)
     return BaseUtil::Filesystem::hasExtension(name, BzipExtension);
 }
 
-bool DataUtil::Format::isIntFile(const std::string& file_name)
-{
-    return BaseUtil::Filesystem::hasExtension(uncompressedFilename(file_name), IntExtension);
-}
-
-bool DataUtil::Format::isNicosFile(const std::string& file_name)
-{
-    return BaseUtil::Filesystem::hasExtension(uncompressedFilename(file_name), NicosExtension);
-}
-
-bool DataUtil::Format::isTiffFile(const std::string& file_name)
-{
-    return BaseUtil::Filesystem::hasExtension(uncompressedFilename(file_name), TiffExtension)
-           || BaseUtil::Filesystem::hasExtension(uncompressedFilename(file_name), TiffExtension2);
-}
-
 //! Creates axis of certain type from input stream
 Scale* DataUtil::Format::parseScale(std::istream& input_stream)
 {
diff --git a/Device/IO/DataFormatUtil.h b/Device/IO/DataFormatUtil.h
index 56bd90b2b35f437a01f467601ccccf810261c3a0..eaa236b95787cc9bc62bfe782ad93c50ae9ecfd2 100644
--- a/Device/IO/DataFormatUtil.h
+++ b/Device/IO/DataFormatUtil.h
@@ -39,15 +39,6 @@ bool isGZipped(const std::string& name);
 //! Returns true if name contains *.bz2 extension
 bool isBZipped(const std::string& name);
 
-//! Returns true if file name corresponds to BornAgain native format (compressed or not)
-bool isIntFile(const std::string& file_name);
-
-//! Returns true if file name corresponds to Nicos format (compressed or not)
-bool isNicosFile(const std::string& file_name);
-
-//! Returns true if file name corresponds to tiff file (can be also compressed)
-bool isTiffFile(const std::string& file_name);
-
 Scale* parseScale(std::istream& input_stream);
 
 void fillDatafield(Datafield* data, std::istream& input_stream);