diff --git a/conv_obsidian.py b/conv_obsidian.py
new file mode 100644
index 0000000..0402ba8
--- /dev/null
+++ b/conv_obsidian.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+
+import re
+from pathlib import Path
+from urllib.parse import quote
+
+root = Path(".").resolve()
+
+def find_note(target):
+    """Find target.md anywhere in the tree."""
+    target = target.strip()
+    target = target.split("#")[0].split("|")[0].strip()
+    if not target.endswith(".md"):
+        target += ".md"
+
+    matches = list(root.rglob(target))
+    if matches:
+        return matches[0]
+    return None
+
+def convert_link(match, current_file):
+    raw = match.group(1).strip()
+
+    # Ignore embeds for now: ![[image.png]]
+    if raw.lower().endswith((".png", ".jpg", ".jpeg", ".gif", ".pdf")):
+        return match.group(0)
+
+    # Obsidian alias: [[PID|my PID note]]
+    if "|" in raw:
+        target, label = raw.split("|", 1)
+        label = label.strip()
+    else:
+        target = raw
+        label = raw.split("#")[0].strip()
+
+    # Obsidian heading link: [[PID#Some heading]]
+    if "#" in target:
+        filename, heading = target.split("#", 1)
+        anchor = "#" + quote(heading.strip().lower().replace(" ", "-"))
+    else:
+        filename = target
+        anchor = ""
+
+    found = find_note(filename)
+    if found:
+        rel = found.relative_to(current_file.parent.resolve())
+        link = quote(str(rel).replace("\\", "/"))
+        return f"[{label}]({link}{anchor})"
+
+    # Fallback: assume same directory
+    fallback = filename.strip()
+    if not fallback.endswith(".md"):
+        fallback += ".md"
+    fallback = quote(fallback)
+    return f"[{label}]({fallback}{anchor})"
+
+for md in root.rglob("*.md"):
+    text = md.read_text(encoding="utf-8", errors="ignore")
+
+    # Convert [[...]] but not ![[...]]
+    new_text = re.sub(
+        r"(?<!!)\[\[([^\]]+)\]\]",
+        lambda m: convert_link(m, md),
+        text
+    )
+
+    if new_text != text:
+        md.write_text(new_text, encoding="utf-8")
+        print(f"fixed {md}")
+
+print("Done.")