diff --git a/various-tools/uvdata dat/reader.py b/various-tools/uvdata dat/reader.py
new file mode 100644
index 0000000..e54522a
--- /dev/null
+++ b/various-tools/uvdata dat/reader.py	
@@ -0,0 +1,25 @@
+import struct
+import openpyxl
+
+def read_uvdata(file_path, output_excel):
+    with open(file_path, 'rb') as f:
+        data = f.read()
+    
+    num_sections = struct.unpack('>H', data[4:6])[0]
+    
+    offsets = [struct.unpack('>I', data[6 + i * 4:10 + i * 4])[0] for i in range(num_sections)]
+    offsets.append(len(data))
+    
+    wb = openpyxl.Workbook()
+    ws = wb.active
+    
+    for i in range(num_sections):
+        start, end = offsets[i], offsets[i + 1]
+        section_data = data[start:end]
+        hex_string = ' '.join(f'{byte:02X}' for byte in section_data)
+        ws.append([hex_string])
+    
+    wb.save(output_excel)
+    print(f"Extracted {num_sections} sections to {output_excel}")
+
+read_uvdata('uvdata.dat', 'uvdata.xlsx')
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diff --git a/various-tools/uvdata dat/readme.txt b/various-tools/uvdata dat/readme.txt
new file mode 100644
index 0000000..d7f25b3
--- /dev/null
+++ b/various-tools/uvdata dat/readme.txt	
@@ -0,0 +1,3 @@
+uvdata is like the plist for the sprite sheets. To edit their dimensions, this tool can be used.
+
+Parse uvdata.dat to uvdata.xlsx, and write it back to out_uvdata.dat.
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diff --git a/various-tools/uvdata dat/writer.py b/various-tools/uvdata dat/writer.py
new file mode 100644
index 0000000..45c2de5
--- /dev/null
+++ b/various-tools/uvdata dat/writer.py	
@@ -0,0 +1,36 @@
+import struct
+import openpyxl
+
+def write_uvdata(input_excel, output_file):
+    wb = openpyxl.load_workbook(input_excel)
+    ws = wb.active
+    
+    sections = []
+    for row in ws.iter_rows(values_only=True):
+        if row[0]:
+            sections.append(bytes.fromhex(row[0]))
+    
+    num_sections = len(sections)
+    offsets = []
+    current_offset = 6 + num_sections * 4 + 4 # Additional header repeat
+    
+    for section in sections:
+        offsets.append(current_offset)
+        current_offset += len(section)
+    
+    with open(output_file, 'wb') as f:
+        file_length = struct.pack('>I', current_offset)
+        num_sections_packed = struct.pack('>H', num_sections)
+        f.write(file_length + num_sections_packed)
+
+        for offset in offsets:
+            f.write(struct.pack('>I', offset))
+        
+        f.write(file_length)
+        
+        for section in sections:
+            f.write(section)
+    
+    print(f"Packed {num_sections} sections into {output_file}")
+
+write_uvdata('uvdata.xlsx', 'out_uvdata.dat')
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