diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3281bd53..b70f392aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ All notable changes to this project will be documented in this file.
 - [#1757] Binary search - SWF files need to be sorted by file position
 - [#1803] AS3 Direct editation - Colliding catch name with other variable names / arguments
 - AS3 Direct editation - slow property resolving (Now up to 10 times faster compilation)
+- [#1875] Garbage collect SWF and its caches after closing it
 
 ### Changed
 - GFX - DefineExternalImage2 no longer handled as character
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
index b332abee8..a094962e7 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
@@ -459,7 +459,15 @@ public final class SWF implements SWFContainerItem, Timelined {
         clearScriptCache();
         frameCache.clear();
         soundCache.clear();
-
+        
+        clearImageCache();
+        clearShapeCache();
+        clearAbcListCache();
+        
+        characters = null;
+        characterIdTags = null;
+        externalImages2 = null;
+        
         timeline = null;
         if (dumpInfo != null) {
             clearDumpInfo(dumpInfo);
@@ -2827,6 +2835,7 @@ public final class SWF implements SWFContainerItem, Timelined {
     public void clearAllCache() {
         characters = null;
         characterIdTags = null;
+        externalImages2 = null;
         timeline = null;
         cyclicCharacters = null;
         clearReadOnlyListCache();
diff --git a/src/com/jpexs/decompiler/flash/gui/Main.java b/src/com/jpexs/decompiler/flash/gui/Main.java
index 349b48a4a..501c6f48a 100644
--- a/src/com/jpexs/decompiler/flash/gui/Main.java
+++ b/src/com/jpexs/decompiler/flash/gui/Main.java
@@ -1618,7 +1618,7 @@ public class Main {
         View.checkAccess();
 
         sourceInfos.remove(swf.sourceInfo);
-        mainFrame.getPanel().close(swf);
+        mainFrame.getPanel().close(swf);               
     }
 
     public static void reloadFile(SWFList swf) {
@@ -1645,6 +1645,7 @@ public class Main {
         boolean closeResult = mainFrame.getPanel().closeAll(true);
         if (closeResult) {
             sourceInfos.clear();
+            System.gc();
         }
 
         if (filesChangedDialog != null) {
diff --git a/src/com/jpexs/decompiler/flash/gui/MainFrameMenu.java b/src/com/jpexs/decompiler/flash/gui/MainFrameMenu.java
index 9749f3361..afc37240a 100644
--- a/src/com/jpexs/decompiler/flash/gui/MainFrameMenu.java
+++ b/src/com/jpexs/decompiler/flash/gui/MainFrameMenu.java
@@ -238,8 +238,15 @@ public abstract class MainFrameMenu implements MenuBuilder {
         if (swf == null) {
             return;
         }
-
         Main.closeFile(swf.swfList);
+        swf = null;
+        Timer timer = new Timer();
+        timer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                System.gc();
+            }
+        }, 1000);
     }
 
     protected boolean closeAllActionPerformed(ActionEvent evt) {
@@ -248,7 +255,18 @@ public abstract class MainFrameMenu implements MenuBuilder {
         }
 
         if (swf != null) {
-            return Main.closeAll();
+            boolean result = Main.closeAll();
+            if (result) {
+                swf = null;
+                Timer timer = new Timer();
+                timer.schedule(new TimerTask() {
+                    @Override
+                    public void run() {
+                        System.gc();
+                    }
+                }, 1000);
+            }
+            return result;
         }
 
         return false;
@@ -508,7 +526,7 @@ public abstract class MainFrameMenu implements MenuBuilder {
                         lang = null;
                     }
                     ByteArrayOutputStream os = new ByteArrayOutputStream();
-                    try (PrintStream stream = new PrintStream(os, false, "UTF-8")) {
+                    try ( PrintStream stream = new PrintStream(os, false, "UTF-8")) {
                         CheckResources.checkResources(stream, lang);
                         String str = new String(os.toByteArray(), Utf8Helper.charset);
                         editor.setText(str);
@@ -1139,7 +1157,7 @@ public abstract class MainFrameMenu implements MenuBuilder {
                         + "Jre 64bit: " + Helper.is64BitJre() + Helper.newLine
                         + "Os 64bit: " + Helper.is64BitOs() + Helper.newLine
                         + "Max: " + (runtime.maxMemory() / 1024 / 1024) + "MB" + Helper.newLine
-                        + "Total: " + (runtime.totalMemory()/ 1024 / 1024) + "MB" + Helper.newLine
+                        + "Total: " + (runtime.totalMemory() / 1024 / 1024) + "MB" + Helper.newLine
                         + "Used: " + ((runtime.totalMemory() - runtime.freeMemory()) / 1024 / 1024) + "MB" + Helper.newLine
                         + "Free: " + (runtime.freeMemory() / 1024 / 1024) + "MB";
                 ViewMessages.showMessageDialog(Main.getDefaultMessagesComponent(), info);