diff --git a/README.md b/README.md
index 5b55c75..69fe16f 100644
--- a/README.md
+++ b/README.md
@@ -70,3 +70,10 @@ ___
 - [gghhkm](https://github.com/gghhkm)
 - [Vendicated](https://github.com/Vendicated)
 - [Milind Goel](https://github.com/milindgoel15)
+
+___
+
+## BSDiff Tools
+
+- To use these you must have a copy of a v1 vanced api "apks" folder of the version you want make diffs of and run the python script from there
+- Before you run the script move the root/Theme stock and dpi apk to your working directory, delete the hash.json file and run the "generate_base_apk.sh" script to make a compatible base apk
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diff --git a/apk2bsdiff.py b/apk2bsdiff.py
new file mode 100644
index 0000000..ab75f32
--- /dev/null
+++ b/apk2bsdiff.py
@@ -0,0 +1,18 @@
+import bsdiff4
+import shutil
+from pathlib import Path
+
+for path in Path('./nonroot/Arch').rglob('*.apk'):
+    bsdiff4.file_diff(str(path).replace('nonroot', 'root'), path, './patches/Arch/' + path.name.replace('.apk','.bsdiff'))
+
+for path in Path('./nonroot/Language').rglob('*.apk'):
+    bsdiff4.file_diff(str(path).replace('nonroot', 'root'), path, './patches/Language/' + path.name.replace('.apk','.bsdiff'))
+
+for path in Path('./nonroot/Theme').rglob('*.apk'):
+    bsdiff4.file_diff('base.apk', path, './patches/Theme/' + path.name.replace('.apk','.bsdiff'))
+
+for path in Path('./root/Theme').rglob('*.apk'):
+    bsdiff4.file_diff('base.apk', path, './patches/root/' + path.name.replace('.apk','.bsdiff'))
+
+for path in Path('./patches').rglob('*.bsdiff'):
+    shutil.copy(path, './patches/' + str(path).replace('/', '-')[8:])
diff --git a/base_apk_generator.sh b/base_apk_generator.sh
new file mode 100644
index 0000000..80a0185
--- /dev/null
+++ b/base_apk_generator.sh
@@ -0,0 +1,15 @@
+echo 'Extracting apks...'
+mv stock.apk base.apk
+unzip base.apk resources.arsc
+unzip dpi.apk -d dpi
+echo 'combining resources...'
+cd dpi
+touch -a -m -t 198101010101.01 .
+touch -a -m -t 198101010101.01 ./res
+touch -a -m -t 198101010101.01 ./res/*
+zip -0X ../base.apk ./res/*
+zip -X ../base.apk ./res/*.xml
+cd ..
+cat ./dpi/resources.arsc >> ./resources.arsc
+touch -a -m -t 198101010101.01 resources.arsc
+zip -0X base.apk ./resources.arsc
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