3 files changed, 22 insertions, 6 deletions
diff --git a/NEWS b/NEWS
index 64603af..6a05b79 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,7 @@ I'll assume I'm the only user.
 Version 1.20160502+git, not yet released
 ----------------------------------------
 
+* prettyson and prettyml now read from stdin by default.
 
 Version 1.20160502, released 2016-05-02
 ----------------------------------------
diff --git a/prettyml b/prettyml
index fe9f468..f4fbb5e 100755
--- a/prettyml
+++ b/prettyml
@@ -4,8 +4,15 @@ import sys
 
 import yaml
 
+def inputs(args):
+    if args:
+        for filename in args:
+            with open(filename) as f:
+                yield filename, f
+    else:
+        yield '-', sys.stdin
+
 objs = []
-for filename in sys.argv[1:]:
-    with open(filename) as f:
-        objs.append(yaml.safe_load(f))
+for filename, f in inputs(sys.argv[1:]):
+    objs.append(yaml.safe_load(f))
 yaml.safe_dump_all(objs, stream=sys.stdout, indent=4, default_flow_style=False)
diff --git a/prettyson b/prettyson
index 367cff8..0a327ad 100755
--- a/prettyson
+++ b/prettyson
@@ -2,8 +2,16 @@
 
 import sys, json
 
+def inputs(args):
+    if args:
+        for filename in args:
+            with open(filename) as f:
+                yield filename, f
+    else:
+        yield '-', sys.stdin
+
 objs = []
-for filename in sys.argv[1:]:
-    with open(filename) as f:
-        objs.append(json.load(f))
+for filename, f in inputs(sys.argv[1:]):
+    objs.append(json.load(f))
 json.dump(objs, sys.stdout, indent=4)
+sys.stdout.write('\n')