diff --git a/PTPLogger/PTPLogger_Graphing.py b/PTPLogger/PTPLogger_Graphing.py
new file mode 100644
index 0000000..5d72f2c
--- /dev/null
+++ b/PTPLogger/PTPLogger_Graphing.py
@@ -0,0 +1,85 @@
+import re
+import datetime as dt
+import matplotlib.pyplot as plt
+import tkinter as tk
+from tkinter import filedialog, messagebox
+
+def parse_log(file_path):
+    t = []
+    rms = []
+    freq = []
+
+    with open(file_path, encoding='utf-8', errors='ignore') as f:
+        for line in f:
+            # Match only valid ptp4l stat lines
+            match = re.search(
+                r'^(\w+ \d+ \d+:\d+:\d+).*rms (\d+).*freq ([+-]?\d+)',
+                line
+            )
+            if match:
+                try:
+                    # Add year (needed for parsing)
+                    timestr = match.group(1) + " 2026"
+                    timestamp = dt.datetime.strptime(
+                        timestr, "%b %d %H:%M:%S %Y"
+                    )
+
+                    t.append(timestamp)
+                    rms.append(int(match.group(2)))
+                    freq.append(int(match.group(3)))
+
+                except Exception:
+                    # Skip malformed lines safely
+                    pass
+
+    return t, rms, freq
+
+
+def plot_data(t, rms, freq):
+    if not t:
+        messagebox.showerror("Error", "No valid PTP lines found.")
+        return
+
+    fig, (ax1, ax2) = plt.subplots(2, 1, sharex=True)
+
+    ax1.plot(t, rms)
+    ax1.set_ylabel("RMS (ns)")
+    ax1.set_title("PTP RMS Offset")
+
+    ax2.plot(t, freq)
+    ax2.set_ylabel("Frequency deviation")
+    ax2.set_xlabel("Time")
+    ax2.set_title("PTP Frequency Deviation")
+
+    plt.xticks(rotation=30)
+    plt.tight_layout()
+    plt.show()
+
+
+def open_file():
+    file_path = filedialog.askopenfilename(
+        title="Select PTP log file",
+        filetypes=[("Log files", "*.log *.txt"), ("All files", "*.*")]
+    )
+
+    if not file_path:
+        return
+
+    t, rms, freq = parse_log(file_path)
+
+    plot_data(t, rms, freq)
+
+
+# --- GUI setup ---
+root = tk.Tk()
+root.title("PTP Log Viewer")
+
+root.geometry("300x150")
+
+label = tk.Label(root, text="PTP Log Plotter", font=("Arial", 14))
+label.pack(pady=10)
+
+btn = tk.Button(root, text="Open Log File", command=open_file)
+btn.pack(pady=10)
+
+root.mainloop()
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