diff --git a/src/bmffimage.cpp b/src/bmffimage.cpp
index 13f3643c..9a0f7e65 100644
--- a/src/bmffimage.cpp
+++ b/src/bmffimage.cpp
@@ -61,6 +61,7 @@ struct BmffBoxHeader
 #define TAG_heix 0x68656978 /**< "heix" HEIC */
 #define TAG_mif1 0x6d696631 /**< "mif1" HEIF */
 #define TAG_crx  0x63727820 /**< "crx " Canon CR3 */
+#define TAG_jxl  0x4a584c20 /**< "JXL " JPEG XL   */  
 #define TAG_moov 0x6d6f6f76 /**< "moov" Movie */
 #define TAG_meta 0x6d657461 /**< "meta" Metadata */
 #define TAG_mdat 0x6d646174 /**< "mdat" Media data */
@@ -78,6 +79,8 @@ struct BmffBoxHeader
 #define TAG_cmt3 0x434D5433 /**< "CMT3" canonID */
 #define TAG_cmt4 0x434D5434 /**< "CMT4" gpsID */
 #define TAG_colr 0x636f6c72 /**< "colr" */
+#define TAG_exif 0x45786966 /**< "Exif" Used by JXL*/
+#define TAG_xml  0x786d6c20 /**< "xml"  Used by JXL*/
 
 // *****************************************************************************
 // class member definitions
@@ -149,6 +152,8 @@ namespace Exiv2
                 return "image/heif";
             case TAG_crx:
                 return "image/x-canon-cr3";
+            case TAG_jxl:
+                return "image/jxl"; // https://github.com/novomesk/qt-jpegxl-image-plugin/issues/1
             default:
                 return "image/generic";
         }
@@ -435,6 +440,12 @@ namespace Exiv2
             case TAG_cmt4:
                 parseTiff(Internal::Tag::cmt4, box.length);
                 break;
+            case TAG_exif:
+                parseTiff(Internal::Tag::root, box.length,address+8);
+                break;
+            case TAG_xml:
+                parseXmp(box.length,io_->tell());
+                break;
 
             default: break ; /* do nothing */
         }
@@ -610,7 +621,8 @@ namespace Exiv2
             return false;
         }
 
-        bool matched = buf[4] == 'f' && buf[5] == 't' && buf[6] == 'y' && buf[7] == 'p';
+        bool matched = (buf[4] == 'f' && buf[5] == 't' && buf[6] == 'y' && buf[7] == 'p')
+                     ||(buf[4] == 'J' && buf[5] == 'X' && buf[6] == 'L' && buf[7] == ' ');
         if (!advance || !matched) {
             iIo.seek(static_cast<long>(0), BasicIo::beg);
         }
diff --git a/test/data/Reagan.jxl b/test/data/Reagan.jxl
new file mode 100644
index 00000000..0d7706ac
Binary files /dev/null and b/test/data/Reagan.jxl differ
diff --git a/tests/bugfixes/github/test_issue_1503.py b/tests/bugfixes/github/test_issue_1503.py
new file mode 100644
index 00000000..51c07691
--- /dev/null
+++ b/tests/bugfixes/github/test_issue_1503.py
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+
+import system_tests
+import unittest
+
+# test needs system_tests.BT.vv['enable_bmff']=1
+bSkip=system_tests.BT.verbose_version().get('enable_bmff')!='1'
+if bSkip:
+    raise unittest.SkipTest('*** requires enable_bmff=1 ***')
+
+class issue_1503_jxl_bmff(metaclass=system_tests.CaseMeta):
+    url = "https://github.com/Exiv2/exiv2/issue/1503"
+    filename = "$data_path/Reagan.jxl"
+    commands = ["$exiv2  -pS       $filename"
+               ,"$exiv2  -g Date/i $filename"
+               ,"$exiv2            $filename"
+               ]
+    retval = [ 0  ] * len(commands)
+    stderr = [ "" ] * len(commands)
+    stdin  = [ "" ] * len(commands)
+    stdout = ["""Exiv2::BmffImage::boxHandler: JXL         0->12 
+Exiv2::BmffImage::boxHandler: ftyp       12->20 brand: jxl 
+Exiv2::BmffImage::boxHandler: Exif       32->5722 
+Exiv2::BmffImage::boxHandler: xml      5754->5306 
+Exiv2::BmffImage::boxHandler: jbrd    11060->1707 
+Exiv2::BmffImage::boxHandler: jxlc    12767->20125 
+""","""Exif.Image.DateTime                          Ascii      20  2016:09:13 11:58:16
+Exif.Photo.DateTimeOriginal                  Ascii      20  2004:06:21 23:37:53
+Exif.Photo.DateTimeDigitized                 Ascii      20  2004:06:21 23:37:53
+Xmp.xmp.ModifyDate                           XmpText    25  2016-09-13T11:58:16+01:00
+Xmp.xmp.CreateDate                           XmpText    25  2004-06-21T23:37:53+01:00
+Xmp.xmp.MetadataDate                         XmpText    25  2016-09-13T11:58:16+01:00
+Xmp.photoshop.DateCreated                    XmpText    10  2004-06-21
+""","""File name       : $filename
+File size       : 32892 Bytes
+MIME type       : image/generic
+Image size      : 200 x 130
+Thumbnail       : image/jpeg, 4196 Bytes
+Camera make     : NIKON CORPORATION
+Camera model    : NIKON D1X
+Image timestamp : 2004:06:21 23:37:53
+File number     : 
+Exposure time   : 1/125 s
+Aperture        : F5
+Exposure bias   : +1/3 EV
+Flash           : No flash
+Flash bias      : 
+Focal length    : 42.0 mm
+Subject distance: 
+ISO speed       : 
+Exposure mode   : Manual
+Metering mode   : Center weighted average
+Macro mode      : 
+Image quality   : 
+White balance   : Manual
+Copyright       : 
+Exif comment    : 
+
+"""
+]