diff --git a/README.md b/README.md
index 24473303..4f0a3dd3 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,7 @@ Everything will immediately show up in ImHex's Content Store and gets bundled wi
 | ISO | `application/x-iso9660-image` | [`patterns/iso.hexpat`](patterns/iso.hexpat) | ISO 9660 file system |
 | Java Class | `application/x-java-applet` | [`patterns/java_class.hexpat`](patterns/java_class.hexpat) | Java Class files |
 | JPEG | `image/jpeg` | [`patterns/jpeg.hexpat`](patterns/jpeg.hexpat) | JPEG Image Format |
+| JPEG XL | `patterns/jxl.hexpat` | [`patterns/jxl.hexpat`](patterns/jxl.hexpat) | JPEG XL(JXL) image format |
 | LOC | | [`patterns/loc.hexpat`](patterns/loc.hexpat) | Minecraft Legacy Console Edition Language file |
 | Lua 5.1 | | [`patterns/lua51.hexpat`](patterns/lua51.hexpat) | Lua 5.1 bytecode |
 | Lua 5.2 | | [`patterns/lua52.hexpat`](patterns/lua52.hexpat) | Lua 5.2 bytecode |
diff --git a/patterns/jxl.hexpat b/patterns/jxl.hexpat
new file mode 100644
index 00000000..0cc7c60b
--- /dev/null
+++ b/patterns/jxl.hexpat
@@ -0,0 +1,140 @@
+#pragma author dxan29a
+#pragma description JPEG XL Container Format
+
+import std.io;
+import std.mem;
+#pragma endian big
+#pragma MIME image/jxl
+
+enum Type : u32 {
+    SIGNATURE               = 0x4A584C20,   // JXL 
+    FILETYPE                = 0x66747970,   // ftyp
+    LEVEL                   = 0x6A786C6C,   // jxll
+    JUMBF                   = 0x6A756D62,   // jumb
+    EXIF                    = 0x45786966,   // Exif
+    XML                     = 0x786D6C20,   // xml
+    BROTILCOMPRESSED        = 0x62726F62,   // brob
+    FRAMEIDX                = 0x6A786C69,   // jxlu
+    CODESTREAM              = 0x6A786C63,   // jxlc
+    PARTIALCODESTREAM       = 0x6A786C70,   // jxlp
+    BITSTREAMRECONSTRUCTION = 0x6A627264,   // jbrd
+    GAINMAPIMAGE            = 0x6872676D    // hrgm
+};
+
+struct Header {
+    u32 LBox;
+    u64 lbox = LBox;
+    Type box_type;
+    if (LBox == 1) {
+        u64 XLBox;
+        u64xlbox = XLBox;
+    } else {
+        u64 xlbox = 0;
+    }
+};
+
+struct Signature {
+    u32 validation;
+};
+
+struct FileType {
+    u8 JXL_JXL[12];
+};
+
+struct Level {
+    u8 Level;
+};
+
+struct Jumbf<auto lbox, auto xlbox> {
+    if (lbox == 1) {
+        u8 JumbfBoxes[xlbox - 16];
+    } else {
+        u8 JumbfBoxes[lbox - 8];
+    }
+};
+
+struct Exif<auto lbox, auto xlbox> {
+    u32 tiff_header_offset;
+    if (lbox == 1) {
+        u8 ExifPayload[xlbox - 16 - sizeof(tiff_header_offset)];
+    } else {
+        u8 ExifPayload[lbox - 8 - sizeof(tiff_header_offset)];
+    }
+};
+
+struct XML<auto lbox, auto xlbox> {
+    if (lbox == 1) {
+        u8 XMLdata[xlbox - 16 - sizeof(tiff_header_offset)];
+    } else {
+        u8 XMLdata[lbox - 8 - sizeof(tiff_header_offset)];
+    }
+};
+
+struct PartialCodeStream<auto lbox, auto xlbox> {
+    u32 Index;
+    if (lbox == 1) {
+        u8 CodeStream[xlbox - 16 - sizeof(Index)];
+    } else {
+        u8 CodeStream[lbox - 8 - sizeof(Index)];
+    }
+};
+
+struct BrotilCompressed<auto lbox, auto xlbox> {
+    u32 PayloadTypes;
+    if (lbox == 1) {
+        u8 RemainingBytes[xlbox - 16 - sizeof(PayloadTypes)];
+    } else {
+        u8 RemainingBytes[lbox - 8 - sizeof(PayloadTypes)];
+    }
+};
+
+struct FrameIndex<auto lbox, auto xlbox> {
+    if (lbox == 1) {
+        u8 RemainingBytes[xlbox - 16];
+    } else {
+        u8 RemainingBytes[lbox - 8];
+    }
+};
+
+struct BitStreamReconstruction<auto lbox, auto xlbox> {
+    if (lbox == 1) {
+        u8 RemainingBytes[xlbox - 16];
+    } else {
+        u8 RemainingBytes[lbox - 8];
+    }
+};
+
+struct GainMapImage<auto lbox, auto xlbox> {
+    if (lbox == 1) {
+        u8 GainMapImage[xlbox - 16];
+    } else {
+        u8 GainMapImage[lbox - 8];
+    }
+};
+
+struct UnknownBox<auto lbox, auto xlbox> {
+    if (lbox == 1) {
+        u8 remaining_bytes[xlbox - 16];
+    } else {
+        u8 remaining_bytes[lbox - 8];
+    }
+};
+
+struct Box {
+    Header header;
+    match (header.box_type) {   
+        (Type::SIGNATURE):                  Signature                                           signature;
+        (Type::FILETYPE):                   FileType                                            filetype;
+        (Type::LEVEL):                      Level                                               level;
+        (Type::JUMBF):                      Jumbf<header.lbox, header.xlbox>                    jumbf;
+        (Type::EXIF):                       Exif<header.lbox, header.xlbox>                     exif;
+        (Type::PARTIALCODESTREAM):          PartialCodeStream<header.lbox, header.xlbox>        partial_codestream;
+        (Type::FRAMEIDX):                   FrameIndex<header.lbox, header.xlbox>               frame_index;
+        (Type::BROTILCOMPRESSED):           BrotilCompressed<header.lbox, header.xlbox>         brotil_compressed;
+        (Type::BITSTREAMRECONSTRUCTION):    BitStreamReconstruction<header.lbox, header.xlbox>  bitstream_reconstruction;
+        (Type::GAINMAPIMAGE):               GainMapImage<header.lbox, header.xlbox>             gain_map_image;;
+        (_):                                UnknownBox<header.lbox, header.xlbox>               unknown_box;
+    }
+};
+
+Box boxes[while(!std::mem::eof())] @ 0x00;
\ No newline at end of file
diff --git a/tests/patterns/test_data/jxl.hexpat.jxl b/tests/patterns/test_data/jxl.hexpat.jxl
new file mode 100644
index 00000000..65b69e1a
Binary files /dev/null and b/tests/patterns/test_data/jxl.hexpat.jxl differ