diff --git a/src/se/icus/mag/pmanvil/PMAnvilConverter.java b/src/se/icus/mag/pmanvil/PMAnvilConverter.java
new file mode 100755
index 0000000..46ee46f
--- /dev/null
+++ b/src/se/icus/mag/pmanvil/PMAnvilConverter.java
@@ -0,0 +1,84 @@
+package se.icus.mag.pmanvil;
+
+/**
+ * Copyright Mojang AB.
+ * 
+ * Don't do evil.
+ *
+ * Adaptations for PMAnvil conversions by magicus 2018.
+ */
+
+
+import net.minecraft.world.level.storage.ProgressListener;
+
+import java.io.File;
+
+public class PMAnvilConverter {
+
+    public static void main(String[] args) {
+
+        if (args.length != 2) {
+            printUsageAndExit();
+        }
+
+        File baseFolder;
+        try {
+            baseFolder = new File(args[0]);
+            if (!baseFolder.exists()) {
+                throw new RuntimeException(args[0] + " doesn't exist");
+            } else if (!baseFolder.isDirectory()) {
+                throw new RuntimeException(args[0] + " is not a folder");
+            }
+        } catch (Exception e) {
+            System.err.println("Base folder problem: " + e.getMessage());
+            System.out.println("");
+            printUsageAndExit();
+            return;
+        }
+
+        PMAnvilLevelStorageSource storage = new PMAnvilLevelStorageSource(baseFolder);
+        if (!storage.isConvertible(args[1])) {
+            System.err.println("World called " + args[1] + " is not convertible to the Anvil format");
+            System.out.println("");
+            printUsageAndExit();
+            return;
+        }
+
+        System.out.println("Converting map!");
+        storage.convertLevel(args[1], new ProgressListener() {
+            private long timeStamp = System.currentTimeMillis();
+
+            public void progressStartNoAbort(String string) {
+            }
+
+            public void progressStart(String string) {
+            }
+
+            public void progressStagePercentage(int i) {
+                if ((System.currentTimeMillis() - timeStamp) >= 1000L) {
+                    timeStamp = System.currentTimeMillis();
+                    System.out.println("Converting... " + i + "%");
+                }
+            }
+
+            public void progressStage(String string) {
+            }
+        });
+        System.out.println("Done!");
+        System.out.println("You can now delete all *.mcapm files in the converted world.");
+    }
+
+    private static void printUsageAndExit() {
+        System.out.println("Map converter for Minecraft, from format \"PMAnvil\" to \"Anvil\". (c) Mojang AB 2012, magicus 2018");
+        System.out.println("");
+        System.out.println("Usage:");
+        System.out.println("\tjava -jar pmanvil-converter.jar <base folder> <world name>");
+        System.out.println("Where:");
+        System.out.println("\t<base folder>\tThe full path to the folder containing Minecraft world folders");
+        System.out.println("\t<world name>\tThe folder name of the Minecraft world to be converted");
+        System.out.println("Example:");
+        System.out.println("\tjava -jar pmanvil-converter.jar /home/jeb_/minecraft world");
+        System.exit(1);
+    }
+
+}
diff --git a/src/se/icus/mag/pmanvil/PMAnvilLevelStorageSource.java b/src/se/icus/mag/pmanvil/PMAnvilLevelStorageSource.java
new file mode 100755
index 0000000..b0731e4
--- /dev/null
+++ b/src/se/icus/mag/pmanvil/PMAnvilLevelStorageSource.java
@@ -0,0 +1,278 @@
+package se.icus.mag.pmanvil;
+
+/**
+ * Copyright Mojang AB.
+ * 
+ * Don't do evil.
+ *
+ * Adaptations for PMAnvil conversions by magicus 2018.
+ */
+
+import java.io.*;
+import java.util.ArrayList;
+
+import net.minecraft.world.level.chunk.storage.*;
+
+import com.mojang.nbt.*;
+import net.minecraft.world.level.storage.LevelStorage;
+import net.minecraft.world.level.storage.ProgressListener;
+
+public class PMAnvilLevelStorageSource {
+
+    public static final String PM_ANVIL_EXTENSION = ".mcapm";
+
+    private File baseDir;
+
+    public PMAnvilLevelStorageSource(File dir) {
+        baseDir = dir;
+    }
+
+    public boolean isConvertible(String levelId) {
+
+        // Pocketmine does not set level data version properly, so ignore it
+        // Instead, check if there is mcapm files present
+        File baseFolder = new File(baseDir, levelId);
+        File regionFolder = new File(baseFolder, "region");
+        File[] list = regionFolder.listFiles(new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                return name.endsWith(PM_ANVIL_EXTENSION);
+            }
+        });
+
+        if (list == null) {
+            return false;
+        }
+
+        return true;
+    }
+
+    private CompoundTag getDataTagFor(String levelId) {
+        File dir = new File(baseDir, levelId);
+        if (!dir.exists()) return null;
+
+        File dataFile = new File(dir, "level.dat");
+        if (dataFile.exists()) {
+            try {
+                CompoundTag root = NbtIo.readCompressed(new FileInputStream(dataFile));
+                CompoundTag tag = root.getCompound("Data");
+                return tag;
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+
+        dataFile = new File(dir, "level.dat_old");
+        if (dataFile.exists()) {
+            try {
+                CompoundTag root = NbtIo.readCompressed(new FileInputStream(dataFile));
+                CompoundTag tag = root.getCompound("Data");
+                return tag;
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        return null;
+    }
+
+    public boolean convertLevel(String levelId, ProgressListener progress) {
+
+        progress.progressStagePercentage(0);
+
+        ArrayList<File> normalRegions = new ArrayList<File>();
+        ArrayList<File> netherRegions = new ArrayList<File>();
+        ArrayList<File> enderRegions = new ArrayList<File>();
+//
+        File baseFolder = new File(baseDir, levelId);
+        File netherFolder = new File(baseFolder, LevelStorage.NETHER_FOLDER);
+        File enderFolder = new File(baseFolder, LevelStorage.ENDER_FOLDER);
+
+        System.out.println("Scanning folders...");
+
+        // find normal world
+        addRegionFiles(baseFolder, normalRegions);
+
+        // find hell world
+        if (netherFolder.exists()) {
+            addRegionFiles(netherFolder, netherRegions);
+        }
+        if (enderFolder.exists()) {
+            addRegionFiles(enderFolder, enderRegions);
+        }
+
+        int totalCount = normalRegions.size() + netherRegions.size() + enderRegions.size();
+        System.out.println("Total conversion count is " + totalCount);
+
+        // convert normal world
+        convertRegions(new File(baseFolder, "region"), normalRegions, 0, totalCount, progress);
+        // convert hell world
+        convertRegions(new File(netherFolder, "region"), netherRegions, normalRegions.size(), totalCount, progress);
+        // convert end world
+        convertRegions(new File(enderFolder, "region"), enderRegions, normalRegions.size() + netherRegions.size(), totalCount, progress);
+
+
+        return true;
+    }
+
+    private void convertRegions(File baseFolder, ArrayList<File> regionFiles, int currentCount, int totalCount, ProgressListener progress) {
+
+        for (File regionFile : regionFiles) {
+            convertRegion(baseFolder, regionFile, currentCount, totalCount, progress);
+
+            currentCount++;
+            int percent = (int) Math.round(100.0d * (double) currentCount / (double) totalCount);
+            progress.progressStagePercentage(percent);
+        }
+
+    }
+
+    private void convertRegion(File baseFolder, File regionFile, int currentCount, int totalCount, ProgressListener progress) {
+
+        try {
+            String name = regionFile.getName();
+
+            RegionFile regionSource = new RegionFile(regionFile);
+            RegionFile regionDest = new RegionFile(new File(baseFolder, name.substring(0, name.length() - PM_ANVIL_EXTENSION.length()) + RegionFile.ANVIL_EXTENSION));
+
+            for (int x = 0; x < 32; x++) {
+                for (int z = 0; z < 32; z++) {
+                    if (regionSource.hasChunk(x, z) && !regionDest.hasChunk(x, z)) {
+                        DataInputStream regionChunkInputStream = regionSource.getChunkDataInputStream(x, z);
+                        if (regionChunkInputStream == null) {
+                            System.out.println("Failed to fetch input stream");
+                            continue;
+                        }
+                        CompoundTag chunkData = NbtIo.read(regionChunkInputStream);
+                        regionChunkInputStream.close();
+
+                        CompoundTag compound = chunkData.getCompound("Level");
+                        {
+                            CompoundTag tag = new CompoundTag();
+                            CompoundTag levelData = new CompoundTag();
+                            tag.put("Level", levelData);
+                            convertFromPmAnvilFormat(compound, levelData);
+
+                            DataOutputStream chunkDataOutputStream = regionDest.getChunkDataOutputStream(x, z);
+                            NbtIo.write(tag, chunkDataOutputStream);
+                            chunkDataOutputStream.close();
+                        }
+                    }
+                }
+                int basePercent = (int) Math.round(100.0d * (double) (currentCount * 1024) / (double) (totalCount * 1024));
+                int newPercent = (int) Math.round(100.0d * (double) ((x + 1) * 32 + currentCount * 1024) / (double) (totalCount * 1024));
+                if (newPercent > basePercent) {
+                    progress.progressStagePercentage(newPercent);
+                }
+            }
+
+            regionSource.close();
+            regionDest.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void addRegionFiles(File baseFolder, ArrayList<File> regionFiles) {
+
+        File regionFolder = new File(baseFolder, "region");
+        File[] list = regionFolder.listFiles(new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                return name.endsWith(PM_ANVIL_EXTENSION);
+            }
+        });
+
+        if (list != null) {
+            for (File file : list) {
+                regionFiles.add(file);
+            }
+        }
+    }
+
+    private void convertFromPmAnvilFormat(CompoundTag inTag, CompoundTag outTag) {
+
+        outTag.putInt("xPos", inTag.getInt("xPos"));
+        outTag.putInt("zPos", inTag.getInt("zPos"));
+        outTag.putLong("LastUpdate", inTag.getLong("LastUpdate"));
+        outTag.putIntArray("HeightMap", inTag.getIntArray("HeightMap"));
+        outTag.putByte("TerrainPopulated", inTag.getByte("TerrainPopulated"));
+
+        ListTag<CompoundTag> outSectionTags = new ListTag<CompoundTag>("Sections");
+        ListTag inSectionTags = inTag.getList("Sections");
+
+        for (int i = 0; i < inSectionTags.size(); i++) {
+            CompoundTag inSectionTag = (CompoundTag) inSectionTags.get(i);
+            byte[] blocks = inSectionTag.getByteArray("Blocks");
+            byte[] blockLight = inSectionTag.getByteArray("BlockLight");
+            byte[] skyLight = inSectionTag.getByteArray("SkyLight");
+            byte[] data = inSectionTag.getByteArray("Data");
+
+            CompoundTag outSectionTag = new CompoundTag();
+            outSectionTag.putByte("Y", inSectionTag.getByte("Y"));
+            outSectionTag.putByteArray("Blocks", reorderByteArray(blocks));
+            outSectionTag.putByteArray("Data", reorderNibbleArray(data));
+            outSectionTag.putByteArray("SkyLight", reorderNibbleArray(skyLight));
+            outSectionTag.putByteArray("BlockLight", reorderNibbleArray(blockLight));
+
+            outSectionTags.add(outSectionTag);
+        }
+        outTag.put("Sections", outSectionTags);
+
+        if (inTag.contains("Biomes")) {
+            outTag.putByteArray("Biomes", inTag.getByteArray("Biomes"));
+        }
+
+        outTag.put("Entities", inTag.getList("Entities"));
+
+        outTag.put("TileEntities", inTag.getList("TileEntities"));
+
+        if (inTag.contains("TileTicks")) {
+            outTag.put("TileTicks", inTag.getList("TileTicks"));
+        }
+    }
+
+    // Code for reorderByteArray and reorderNibbleArray, and processing of the
+    // PMAnvil format is based on https://github.com/Awzaw/AnvilConverter
+    private byte[] reorderByteArray(byte[] myarray) {
+        byte[] result = new byte[16 * 16 * 16];
+        int i = 0;
+
+        for (int x = 0; x < 16; x++) {
+            int zMax = x + 256;
+            for (int z = x; z < zMax; z += 16) {
+                int yMax = z + 4096;
+                for (int y = z; y < yMax; y += 256) {
+                    result[i] = myarray[y];
+                    i++;
+                }
+            }
+        }
+        return result;
+    }
+
+    private byte[] reorderNibbleArray(byte[] myarray) {
+        byte commonValue = 0x00;
+        byte[] result = new byte[16 * 16 * 8];
+        int i = 0;
+
+        for (int x = 0; x < 8; x++) {
+            for (int z = 0; z < 16; z++) {
+                int zx = ((z << 3) | x);
+                for (int y = 0; y < 8; y++) {
+                    int j = ((y << 8) | zx);
+                    int j80 = (j | 0x80);
+                    if (myarray[j] == commonValue && myarray[j80] == commonValue) {
+                        // values are already filled
+                    } else {
+                        byte i1 = myarray[j];
+                        byte i2 = myarray[j80];
+                        result[i] = (byte) ((i2 << 4) | (i1 & 0x0f));
+                        result[i | 0x80] = (byte) (((i1 & 0xff) >>> 4) | (i2 & 0xf0));
+                    }
+                    i++;
+                }
+            }
+            i += 128;
+        }
+
+        return result;
+    }
+}