diff --git a/CMakeLists.txt b/CMakeLists.txt
index aba26ee..696eed5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -275,8 +275,15 @@ target_link_libraries(rhubarb-core
 
 # ... rhubarb-exporters
 add_library(rhubarb-exporters
-	src/exporters/Exporter.cpp
 	src/exporters/Exporter.h
+	src/exporters/exporterTools.cpp
+	src/exporters/exporterTools.h
+	src/exporters/JsonExporter.cpp
+	src/exporters/JsonExporter.h
+	src/exporters/TsvExporter.cpp
+	src/exporters/TsvExporter.h
+	src/exporters/XmlExporter.cpp
+	src/exporters/XmlExporter.h
 )
 target_include_directories(rhubarb-exporters PUBLIC "src/exporters")
 target_link_libraries(rhubarb-exporters
@@ -379,7 +386,11 @@ target_link_libraries(rhubarb-tools
 )
 
 # Define Rhubarb executable
-add_executable(rhubarb src/main.cpp)
+add_executable(rhubarb
+	src/main.cpp
+	src/ExportFormat.cpp
+	src/ExportFormat.h
+)
 target_include_directories(rhubarb PUBLIC "src")
 target_link_libraries(rhubarb
 	rhubarb-exporters
diff --git a/src/ExportFormat.cpp b/src/ExportFormat.cpp
new file mode 100644
index 0000000..fe02199
--- /dev/null
+++ b/src/ExportFormat.cpp
@@ -0,0 +1,28 @@
+#include "ExportFormat.h"
+
+using std::string;
+
+ExportFormatConverter& ExportFormatConverter::get() {
+	static ExportFormatConverter converter;
+	return converter;
+}
+
+string ExportFormatConverter::getTypeName() {
+	return "ExportFormat";
+}
+
+EnumConverter<ExportFormat>::member_data ExportFormatConverter::getMemberData() {
+	return member_data{
+		{ ExportFormat::TSV,		"TSV" },
+		{ ExportFormat::XML,		"XML" },
+		{ ExportFormat::JSON,		"JSON" }
+	};
+}
+
+std::ostream& operator<<(std::ostream& stream, ExportFormat value) {
+	return ExportFormatConverter::get().write(stream, value);
+}
+
+std::istream& operator>>(std::istream& stream, ExportFormat& value) {
+	return ExportFormatConverter::get().read(stream, value);
+}
diff --git a/src/ExportFormat.h b/src/ExportFormat.h
new file mode 100644
index 0000000..648d2d8
--- /dev/null
+++ b/src/ExportFormat.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include "EnumConverter.h"
+
+enum class ExportFormat {
+	TSV,
+	XML,
+	JSON
+};
+
+class ExportFormatConverter : public EnumConverter<ExportFormat> {
+public:
+	static ExportFormatConverter& get();
+protected:
+	std::string getTypeName() override;
+	member_data getMemberData() override;
+};
+
+std::ostream& operator<<(std::ostream& stream, ExportFormat value);
+
+std::istream& operator>>(std::istream& stream, ExportFormat& value);
diff --git a/src/exporters/Exporter.cpp b/src/exporters/Exporter.cpp
deleted file mode 100644
index fa6fb04..0000000
--- a/src/exporters/Exporter.cpp
+++ /dev/null
@@ -1,122 +0,0 @@
-#include "Exporter.h"
-#include <boost/property_tree/ptree.hpp>
-#include <boost/property_tree/xml_parser.hpp>
-#include <tools.h>
-#include <boost/version.hpp>
-
-using std::string;
-using boost::property_tree::ptree;
-
-ExportFormatConverter& ExportFormatConverter::get() {
-	static ExportFormatConverter converter;
-	return converter;
-}
-
-string ExportFormatConverter::getTypeName() {
-	return "ExportFormat";
-}
-
-EnumConverter<ExportFormat>::member_data ExportFormatConverter::getMemberData() {
-	return member_data{
-		{ ExportFormat::TSV,		"TSV" },
-		{ ExportFormat::XML,		"XML" },
-		{ ExportFormat::JSON,		"JSON" }
-	};
-}
-
-std::ostream& operator<<(std::ostream& stream, ExportFormat value) {
-	return ExportFormatConverter::get().write(stream, value);
-}
-
-std::istream& operator>>(std::istream& stream, ExportFormat& value) {
-	return ExportFormatConverter::get().read(stream, value);
-}
-
-// Makes sure there is at least one mouth shape
-std::vector<Timed<Shape>> dummyShapeIfEmpty(const Timeline<Shape>& shapes) {
-	std::vector<Timed<Shape>> result;
-	std::copy(shapes.begin(), shapes.end(), std::back_inserter(result));
-	if (result.empty()) {
-		// Add zero-length empty mouth
-		result.push_back(Timed<Shape>(0_cs, 0_cs, Shape::A));
-	}
-	return result;
-}
-
-void TSVExporter::exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) {
-	UNUSED(inputFilePath);
-
-	// Output shapes with start times
-	for (auto& timedShape : shapes) {
-		outputStream << formatDuration(timedShape.getStart()) << "\t" << timedShape.getValue() << "\n";
-	}
-
-	// Output closed mouth with end time
-	outputStream << formatDuration(shapes.getRange().getEnd()) << "\t" << Shape::X << "\n";
-}
-
-void XMLExporter::exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) {
-	ptree tree;
-
-	// Add metadata
-	tree.put("rhubarbResult.metadata.soundFile", inputFilePath.string());
-	tree.put("rhubarbResult.metadata.duration", formatDuration(shapes.getRange().getDuration()));
-
-	// Add mouth cues
-	for (auto& timedShape : dummyShapeIfEmpty(shapes)) {
-		ptree& mouthCueElement = tree.add("rhubarbResult.mouthCues.mouthCue", timedShape.getValue());
-		mouthCueElement.put("<xmlattr>.start", formatDuration(timedShape.getStart()));
-		mouthCueElement.put("<xmlattr>.end", formatDuration(timedShape.getEnd()));
-	}
-
-#if BOOST_VERSION < 105600 // Support legacy syntax
-	using writer_setting = boost::property_tree::xml_writer_settings<char>;
-#else
-	using writer_setting = boost::property_tree::xml_writer_settings<string>;
-#endif
-	write_xml(outputStream, tree, writer_setting(' ', 2));
-}
-
-string escapeJSONString(const string& s) {
-	string result;
-	for (char c : s) {
-		switch (c) {
-		case '"':  result += "\\\""; break;
-		case '\\': result += "\\\\"; break;
-		case '\b': result += "\\b"; break;
-		case '\f': result += "\\f"; break;
-		case '\n': result += "\\n"; break;
-		case '\r': result += "\\r"; break;
-		case '\t': result += "\\t"; break;
-		default:
-			if (c <= '\x1f') {
-				result += fmt::format("\\u{0:04x}", c);
-			} else {
-				result += c;
-			}
-		}
-	}
-	return result;
-}
-
-void JSONExporter::exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) {
-	// Export as JSON.
-	// I'm not using a library because the code is short enough without one and it lets me control the formatting.
-	outputStream << "{\n";
-	outputStream << "  \"metadata\": {\n";
-	outputStream << "    \"soundFile\": \"" << escapeJSONString(inputFilePath.string()) << "\",\n";
-	outputStream << "    \"duration\": " << formatDuration(shapes.getRange().getDuration()) << "\n";
-	outputStream << "  },\n";
-	outputStream << "  \"mouthCues\": [\n";
-	bool isFirst = true;
-	for (auto& timedShape : dummyShapeIfEmpty(shapes)) {
-		if (!isFirst) outputStream << ",\n";
-		isFirst = false;
-		outputStream << "    { \"start\": " << formatDuration(timedShape.getStart())
-			<< ", \"end\": " << formatDuration(timedShape.getEnd())
-			<< ", \"value\": \"" << timedShape.getValue() << "\" }";
-	}
-	outputStream << "\n";
-	outputStream << "  ]\n";
-	outputStream << "}\n";
-}
diff --git a/src/exporters/Exporter.h b/src/exporters/Exporter.h
index 3389b5b..a88502c 100644
--- a/src/exporters/Exporter.h
+++ b/src/exporters/Exporter.h
@@ -3,43 +3,9 @@
 #include <Shape.h>
 #include "ContinuousTimeline.h"
 #include <boost/filesystem/path.hpp>
-#include <iostream>
-
-enum class ExportFormat {
-	TSV,
-	XML,
-	JSON
-};
-
-class ExportFormatConverter : public EnumConverter<ExportFormat> {
-public:
-	static ExportFormatConverter& get();
-protected:
-	std::string getTypeName() override;
-	member_data getMemberData() override;
-};
-
-std::ostream& operator<<(std::ostream& stream, ExportFormat value);
-
-std::istream& operator>>(std::istream& stream, ExportFormat& value);
 
 class Exporter {
 public:
 	virtual ~Exporter() {}
 	virtual void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) = 0;
 };
-
-class TSVExporter : public Exporter {
-public:
-	void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) override;
-};
-
-class XMLExporter : public Exporter {
-public:
-	void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) override;
-};
-
-class JSONExporter : public Exporter {
-public:
-	void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) override;
-};
diff --git a/src/exporters/JsonExporter.cpp b/src/exporters/JsonExporter.cpp
new file mode 100644
index 0000000..35287c9
--- /dev/null
+++ b/src/exporters/JsonExporter.cpp
@@ -0,0 +1,48 @@
+#include "JsonExporter.h"
+#include "exporterTools.h"
+
+using std::string;
+
+string escapeJSONString(const string& s) {
+	string result;
+	for (char c : s) {
+		switch (c) {
+		case '"':  result += "\\\""; break;
+		case '\\': result += "\\\\"; break;
+		case '\b': result += "\\b"; break;
+		case '\f': result += "\\f"; break;
+		case '\n': result += "\\n"; break;
+		case '\r': result += "\\r"; break;
+		case '\t': result += "\\t"; break;
+		default:
+			if (c <= '\x1f') {
+				result += fmt::format("\\u{0:04x}", c);
+			} else {
+				result += c;
+			}
+		}
+	}
+	return result;
+}
+
+void JSONExporter::exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) {
+	// Export as JSON.
+	// I'm not using a library because the code is short enough without one and it lets me control the formatting.
+	outputStream << "{\n";
+	outputStream << "  \"metadata\": {\n";
+	outputStream << "    \"soundFile\": \"" << escapeJSONString(inputFilePath.string()) << "\",\n";
+	outputStream << "    \"duration\": " << formatDuration(shapes.getRange().getDuration()) << "\n";
+	outputStream << "  },\n";
+	outputStream << "  \"mouthCues\": [\n";
+	bool isFirst = true;
+	for (auto& timedShape : dummyShapeIfEmpty(shapes)) {
+		if (!isFirst) outputStream << ",\n";
+		isFirst = false;
+		outputStream << "    { \"start\": " << formatDuration(timedShape.getStart())
+			<< ", \"end\": " << formatDuration(timedShape.getEnd())
+			<< ", \"value\": \"" << timedShape.getValue() << "\" }";
+	}
+	outputStream << "\n";
+	outputStream << "  ]\n";
+	outputStream << "}\n";
+}
diff --git a/src/exporters/JsonExporter.h b/src/exporters/JsonExporter.h
new file mode 100644
index 0000000..7f151ed
--- /dev/null
+++ b/src/exporters/JsonExporter.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include "Exporter.h"
+
+class JSONExporter : public Exporter {
+public:
+	void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) override;
+};
diff --git a/src/exporters/TsvExporter.cpp b/src/exporters/TsvExporter.cpp
new file mode 100644
index 0000000..f81d700
--- /dev/null
+++ b/src/exporters/TsvExporter.cpp
@@ -0,0 +1,13 @@
+#include "TsvExporter.h"
+
+void TSVExporter::exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) {
+	UNUSED(inputFilePath);
+
+	// Output shapes with start times
+	for (auto& timedShape : shapes) {
+		outputStream << formatDuration(timedShape.getStart()) << "\t" << timedShape.getValue() << "\n";
+	}
+
+	// Output closed mouth with end time
+	outputStream << formatDuration(shapes.getRange().getEnd()) << "\t" << Shape::X << "\n";
+}
diff --git a/src/exporters/TsvExporter.h b/src/exporters/TsvExporter.h
new file mode 100644
index 0000000..ad42388
--- /dev/null
+++ b/src/exporters/TsvExporter.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "Exporter.h"
+
+class TSVExporter : public Exporter {
+public:
+	void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) override;
+};
+
diff --git a/src/exporters/XmlExporter.cpp b/src/exporters/XmlExporter.cpp
new file mode 100644
index 0000000..0b65d79
--- /dev/null
+++ b/src/exporters/XmlExporter.cpp
@@ -0,0 +1,29 @@
+#include "XmlExporter.h"
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/xml_parser.hpp>
+#include "exporterTools.h"
+
+using std::string;
+using boost::property_tree::ptree;
+
+void XMLExporter::exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) {
+	ptree tree;
+
+	// Add metadata
+	tree.put("rhubarbResult.metadata.soundFile", inputFilePath.string());
+	tree.put("rhubarbResult.metadata.duration", formatDuration(shapes.getRange().getDuration()));
+
+	// Add mouth cues
+	for (auto& timedShape : dummyShapeIfEmpty(shapes)) {
+		ptree& mouthCueElement = tree.add("rhubarbResult.mouthCues.mouthCue", timedShape.getValue());
+		mouthCueElement.put("<xmlattr>.start", formatDuration(timedShape.getStart()));
+		mouthCueElement.put("<xmlattr>.end", formatDuration(timedShape.getEnd()));
+	}
+
+#if BOOST_VERSION < 105600 // Support legacy syntax
+	using writer_setting = boost::property_tree::xml_writer_settings<char>;
+#else
+	using writer_setting = boost::property_tree::xml_writer_settings<string>;
+#endif
+	write_xml(outputStream, tree, writer_setting(' ', 2));
+}
diff --git a/src/exporters/XmlExporter.h b/src/exporters/XmlExporter.h
new file mode 100644
index 0000000..f7b2c8a
--- /dev/null
+++ b/src/exporters/XmlExporter.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include "Exporter.h"
+
+class XMLExporter : public Exporter {
+public:
+	void exportShapes(const boost::filesystem::path& inputFilePath, const ContinuousTimeline<Shape>& shapes, std::ostream& outputStream) override;
+};
diff --git a/src/exporters/exporterTools.cpp b/src/exporters/exporterTools.cpp
new file mode 100644
index 0000000..25c1cc5
--- /dev/null
+++ b/src/exporters/exporterTools.cpp
@@ -0,0 +1,12 @@
+#include "exporterTools.h"
+
+// Makes sure there is at least one mouth shape
+std::vector<Timed<Shape>> dummyShapeIfEmpty(const Timeline<Shape>& shapes) {
+	std::vector<Timed<Shape>> result;
+	std::copy(shapes.begin(), shapes.end(), std::back_inserter(result));
+	if (result.empty()) {
+		// Add zero-length empty mouth
+		result.push_back(Timed<Shape>(0_cs, 0_cs, Shape::A));
+	}
+	return result;
+}
diff --git a/src/exporters/exporterTools.h b/src/exporters/exporterTools.h
new file mode 100644
index 0000000..e88a8f1
--- /dev/null
+++ b/src/exporters/exporterTools.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include "Shape.h"
+#include "Timeline.h"
+
+// Makes sure there is at least one mouth shape
+std::vector<Timed<Shape>> dummyShapeIfEmpty(const Timeline<Shape>& shapes);
diff --git a/src/main.cpp b/src/main.cpp
index cc24d95..464e134 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,6 +16,10 @@
 #include "exceptions.h"
 #include "textFiles.h"
 #include "rhubarbLib.h"
+#include "ExportFormat.h"
+#include "TsvExporter.h"
+#include "XmlExporter.h"
+#include "JsonExporter.h"
 
 using std::exception;
 using std::string;