diff --git a/Doc/library/imghdr.rst b/Doc/library/imghdr.rst
--- a/Doc/library/imghdr.rst
+++ b/Doc/library/imghdr.rst
@@ -48,6 +48,8 @@
 +------------+-----------------------------------+
 | ``'png'``  | Portable Network Graphics         |
 +------------+-----------------------------------+
+| ``'webp'`` | WebP files                        |
++------------+-----------------------------------+
 
 You can extend the list of file types :mod:`imghdr` can recognize by appending
 to this variable:
diff --git a/Lib/imghdr.py b/Lib/imghdr.py
--- a/Lib/imghdr.py
+++ b/Lib/imghdr.py
@@ -110,6 +110,12 @@
 
 tests.append(test_bmp)
 
+def test_webp(h, f):
+    if h.startswith(b'RIFF') and h[8:12] == b'WEBP':
+        return 'webp'
+
+tests.append(test_webp)
+
 #--------------------#
 # Small test program #
 #--------------------#
diff --git a/Lib/test/imghdrdata/python.webp b/Lib/test/imghdrdata/python.webp
new file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..e824ec7fb1c7fa85716d27454e9d1715a896d4b4
GIT binary patch
literal 432
zc$@*S0Z;x?Nk&Gf0RRA3MM6+kP&il$0000G0000F000jF06|PpNW%aC00AeWsF5V)
zdgmBl=ie%sh?xI$agE?6Fyi5hcQVMq5nO{SFzB#&6^?jOHNglB0#A~lYOqxq9M-mN
zMlVjrc09K2cl)m?t|6lTNzwg}koUSoNhBLOC6P4q6m1U2)8!T*^a~Wekl};38Zw?X
zf`1(;eol4>`-q;ik?)yvM(8qv+xW~#viC(WeIWfd7mOh?RxPF0Ya_f}<E2>@)trH(
z*>09~iWo5uimEJ7H2N@t-@0p1QYp19&*@YY3IPBB09H^qAie+q0FVLzodGHk01yBJ
z05m1A0(3A>2!#xM104t~{pbMx{dA!H0-GO-_d|S~H}=vDuhaiEXyWdty~%GI^s2>U
zuDYL>gx^7;JK9_1@A%8{y?^1a`ak6f?DV^4U;nBp*?-Aw=Z5C2m$~G|^phiuU)_&6
zRUm(rPy9Lf|8LT31L&W;gP3M*vDFj*b{FQc{#}aXpGUv5`oI1i9rF^8{#?(&`uP~c
az0c1dkvX6N{h9$wF)ZG^*?X$20000=+R1SM

diff --git a/Lib/test/test_imghdr.py b/Lib/test/test_imghdr.py
--- a/Lib/test/test_imghdr.py
+++ b/Lib/test/test_imghdr.py
@@ -16,7 +16,8 @@
     ('python.ras', 'rast'),
     ('python.sgi', 'rgb'),
     ('python.tiff', 'tiff'),
-    ('python.xbm', 'xbm')
+    ('python.xbm', 'xbm'),
+    ('python.webp', 'webp')
 )
 
 class UnseekableIO(io.FileIO):