diff --git a/dangerzone/conversion/pixels_to_pdf.py b/dangerzone/conversion/pixels_to_pdf.py
index be708f7..cbc0c86 100644
--- a/dangerzone/conversion/pixels_to_pdf.py
+++ b/dangerzone/conversion/pixels_to_pdf.py
@@ -156,11 +156,17 @@ async def main() -> int:
 
     try:
         await converter.convert()
+        error_code = 0  # Success!
+
     except (RuntimeError, TimeoutError, ValueError) as e:
         converter.update_progress(str(e), error=True)
-        return 1
-    else:
-        return 0  # Success!
+        error_code = 1
+
+    if not running_on_qubes():
+        # Write debug information (containers version)
+        with open("/safezone/captured_output.txt", "wb") as container_log:
+            container_log.write(converter.captured_output)
+    return error_code
 
 
 if __name__ == "__main__":
diff --git a/dangerzone/isolation_provider/container.py b/dangerzone/isolation_provider/container.py
index 75a9355..02ff7b7 100644
--- a/dangerzone/isolation_provider/container.py
+++ b/dangerzone/isolation_provider/container.py
@@ -337,6 +337,13 @@ class Container(IsolationProvider):
                 # We did it
                 success = True
 
+        if getattr(sys, "dangerzone_dev", False):
+            log_path = safe_dir / "captured_output.txt"
+            with open(log_path, "r", encoding="ascii", errors="replace") as f:
+                untrusted_log = f.read(MAX_CONVERSION_LOG_CHARS)
+            text = f"Container output: (pixels to PDF)\n{self.sanitize_conversion_str(untrusted_log)}"
+            log.info(text)
+
         return success
 
     def get_max_parallel_conversions(self) -> int: