From 1f55caf97e0906f2b8b693b01d3d6073df8187c1 Mon Sep 17 00:00:00 2001
From: FooIbar <118464521+FooIbar@users.noreply.github.com>
Date: Mon, 26 Jan 2026 22:26:55 +0800
Subject: [PATCH] gh-144212: Add `image/jxl` to `mimetypes` (GH-144213)

---
 Doc/whatsnew/3.15.rst                                            | 1 +
 Lib/mimetypes.py                                                 | 1 +
 Lib/test/test_mimetypes.py                                       | 1 +
 .../next/Library/2026-01-24-23-11-17.gh-issue-144212.IXqVL8.rst  | 1 +
 4 files changed, 4 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2026-01-24-23-11-17.gh-issue-144212.IXqVL8.rst

diff --git a/Doc/whatsnew/3.15.rst b/Doc/whatsnew/3.15.rst
index c412f48606c0..aec6b1ceea37 100644
--- a/Doc/whatsnew/3.15.rst
+++ b/Doc/whatsnew/3.15.rst
@@ -606,6 +606,7 @@ mimetypes
 * Add ``application/dicom`` MIME type for ``.dcm`` extension. (Contributed by Benedikt Johannes in :gh:`144217`.)
 * Add ``application/node`` MIME type for ``.cjs`` extension. (Contributed by John Franey in :gh:`140937`.)
 * Add ``application/toml``. (Contributed by Gil Forcada in :gh:`139959`.)
+* Add ``image/jxl``. (Contributed by Foolbar in :gh:`144213`.)
 * Rename ``application/x-texinfo`` to ``application/texinfo``.
   (Contributed by Charlie Lin in :gh:`140165`.)
 * Changed the MIME type for ``.ai`` files to ``application/pdf``.
diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index 361f924b55da..fc916c470a01 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -609,6 +609,7 @@ def _default_mime_types():
         '.jpeg'   : 'image/jpeg',
         '.jpm'    : 'image/jpm',
         '.jpx'    : 'image/jpx',
+        '.jxl'    : 'image/jxl',
         '.heic'   : 'image/heic',
         '.heif'   : 'image/heif',
         '.png'    : 'image/png',
diff --git a/Lib/test/test_mimetypes.py b/Lib/test/test_mimetypes.py
index 32adc5935910..fe7584f1f9d3 100644
--- a/Lib/test/test_mimetypes.py
+++ b/Lib/test/test_mimetypes.py
@@ -271,6 +271,7 @@ class MimeTypesTestCase(unittest.TestCase):
                 ("image/jp2", ".jp2"),
                 ("image/jpeg", ".jpg"),
                 ("image/jpm", ".jpm"),
+                ("image/jxl", ".jxl"),
                 ("image/t38", ".t38"),
                 ("image/tiff", ".tiff"),
                 ("image/tiff-fx", ".tfx"),
diff --git a/Misc/NEWS.d/next/Library/2026-01-24-23-11-17.gh-issue-144212.IXqVL8.rst b/Misc/NEWS.d/next/Library/2026-01-24-23-11-17.gh-issue-144212.IXqVL8.rst
new file mode 100644
index 000000000000..be77fb345ada
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-01-24-23-11-17.gh-issue-144212.IXqVL8.rst
@@ -0,0 +1 @@
+Mime type ``image/jxl`` is now supported by :mod:`mimetypes`.
-- 
2.47.3