diff --git a/proselint/command_line.py b/proselint/command_line.py
index d417a2ed8..41b5bc615 100644
--- a/proselint/command_line.py
+++ b/proselint/command_line.py
@@ -113,27 +113,29 @@ def clear_cache():
         shell=True)
 
 
+def errors_to_json(errors):
+    """Convert the errors to JSON."""
+    out = []
+    for e in errors:
+        out.append({
+            "check": e[0],
+            "message": e[1],
+            "line": 1 + e[2],
+            "column": 1 + e[3],
+            "start": 1 + e[4],
+            "end": 1 + e[5],
+            "extent": e[6],
+            "severity": e[7],
+            "replacements": e[8],
+        })
+
+    return json.dumps(dict(status="success", data={"errors": out}))
+
+
 def show_errors(filename, errors, output_json=False, compact=False):
     """Print the errors, resulting from lint, for filename."""
     if output_json:
-        out = []
-        for e in errors:
-            out.append({
-                "check": e[0],
-                "message": e[1],
-                "line": e[2],
-                "column": e[3],
-                "start": e[4],
-                "end": e[5],
-                "extent": e[6],
-                "severity": e[7],
-                "replacements": e[8],
-            })
-        result = dict(
-            status="success",
-            data={"errors": out})
-
-        click.echo(json.dumps(result))
+        click.echo(errors_to_json(errors))
 
     else:
         for error in errors: