diff --git a/src/browser/parser/Parser.zig b/src/browser/parser/Parser.zig
index 3b2bebcd..7e41ecb5 100644
--- a/src/browser/parser/Parser.zig
+++ b/src/browser/parser/Parser.zig
@@ -98,6 +98,29 @@ pub fn parse(self: *Parser, html: []const u8) void {
     );
 }
 
+pub fn parseXML(self: *Parser, xml: []const u8) void {
+    h5e.xml5ever_parse_document(
+        xml.ptr,
+        xml.len,
+        &self.container,
+        self,
+        createElementCallback,
+        getDataCallback,
+        appendCallback,
+        parseErrorCallback,
+        popCallback,
+        createCommentCallback,
+        createProcessingInstruction,
+        appendDoctypeToDocument,
+        addAttrsIfMissingCallback,
+        getTemplateContentsCallback,
+        removeFromParentCallback,
+        reparentChildrenCallback,
+        appendBeforeSiblingCallback,
+        appendBasedOnParentNodeCallback,
+    );
+}
+
 pub fn parseFragment(self: *Parser, html: []const u8) void {
     h5e.html5ever_parse_fragment(
         html.ptr,
diff --git a/src/browser/parser/html5ever.zig b/src/browser/parser/html5ever.zig
index afa22494..8ee873e2 100644
--- a/src/browser/parser/html5ever.zig
+++ b/src/browser/parser/html5ever.zig
@@ -171,3 +171,24 @@ pub const NodeOrText = extern struct {
         text: []const u8,
     };
 };
+
+pub extern "c" fn xml5ever_parse_document(
+    html: [*c]const u8,
+    len: usize,
+    doc: *anyopaque,
+    ctx: *anyopaque,
+    createElementCallback: *const fn (ctx: *anyopaque, data: *anyopaque, QualName, AttributeIterator) callconv(.c) ?*anyopaque,
+    elemNameCallback: *const fn (node_ref: *anyopaque) callconv(.c) *anyopaque,
+    appendCallback: *const fn (ctx: *anyopaque, parent_ref: *anyopaque, NodeOrText) callconv(.c) void,
+    parseErrorCallback: *const fn (ctx: *anyopaque, StringSlice) callconv(.c) void,
+    popCallback: *const fn (ctx: *anyopaque, node_ref: *anyopaque) callconv(.c) void,
+    createCommentCallback: *const fn (ctx: *anyopaque, StringSlice) callconv(.c) ?*anyopaque,
+    createProcessingInstruction: *const fn (ctx: *anyopaque, StringSlice, StringSlice) callconv(.c) ?*anyopaque,
+    appendDoctypeToDocument: *const fn (ctx: *anyopaque, StringSlice, StringSlice, StringSlice) callconv(.c) void,
+    addAttrsIfMissingCallback: *const fn (ctx: *anyopaque, target_ref: *anyopaque, AttributeIterator) callconv(.c) void,
+    getTemplateContentsCallback: *const fn (ctx: *anyopaque, target_ref: *anyopaque) callconv(.c) ?*anyopaque,
+    removeFromParentCallback: *const fn (ctx: *anyopaque, target_ref: *anyopaque) callconv(.c) void,
+    reparentChildrenCallback: *const fn (ctx: *anyopaque, node_ref: *anyopaque, new_parent_ref: *anyopaque) callconv(.c) void,
+    appendBeforeSiblingCallback: *const fn (ctx: *anyopaque, sibling_ref: *anyopaque, NodeOrText) callconv(.c) void,
+    appendBasedOnParentNodeCallback: *const fn (ctx: *anyopaque, element_ref: *anyopaque, prev_element_ref: *anyopaque, NodeOrText) callconv(.c) void,
+) void;
diff --git a/src/browser/webapi/DOMParser.zig b/src/browser/webapi/DOMParser.zig
index eb2d95d8..46ddd14b 100644
--- a/src/browser/webapi/DOMParser.zig
+++ b/src/browser/webapi/DOMParser.zig
@@ -21,6 +21,7 @@ const std = @import("std");
 const js = @import("../js/js.zig");
 const Page = @import("../Page.zig");
 const HTMLDocument = @import("HTMLDocument.zig");
+const XMLDocument = @import("XMLDocument.zig");
 
 const DOMParser = @This();
 
@@ -28,34 +29,59 @@ pub fn init() DOMParser {
     return .{};
 }
 
-pub fn parseFromString(self: *const DOMParser, html: []const u8, mime_type: []const u8, page: *Page) !*HTMLDocument {
-    _ = self;
+pub const HTMLDocumentOrXMLDocument = union(enum) {
+    html_document: *HTMLDocument,
+    xml_document: *XMLDocument,
+};
 
-    // For now, only support text/html
-    if (!std.mem.eql(u8, mime_type, "text/html")) {
-        return error.NotSupported;
+pub fn parseFromString(
+    _: *const DOMParser,
+    html: []const u8,
+    mime_type: []const u8,
+    page: *Page,
+) !HTMLDocumentOrXMLDocument {
+    if (std.mem.eql(u8, mime_type, "text/html")) {
+        // Create a new HTMLDocument
+        const doc = try page._factory.document(HTMLDocument{
+            ._proto = undefined,
+        });
+
+        var normalized = std.mem.trim(u8, html, &std.ascii.whitespace);
+        if (normalized.len == 0) {
+            normalized = "<html></html>";
+        }
+
+        // Parse HTML into the document
+        const Parser = @import("../parser/Parser.zig");
+        var parser = Parser.init(page.arena, doc.asNode(), page);
+        parser.parse(normalized);
+
+        if (parser.err) |pe| {
+            return pe.err;
+        }
+
+        return .{ .html_document = doc };
     }
 
-    // Create a new HTMLDocument
-    const doc = try page._factory.document(HTMLDocument{
-        ._proto = undefined,
-    });
+    if (std.mem.eql(u8, mime_type, "text/xml")) {
+        // Create a new XMLDocument.
+        const doc = try page._factory.document(XMLDocument{
+            ._proto = undefined,
+        });
 
-    var normalized = std.mem.trim(u8, html, &std.ascii.whitespace);
-    if (normalized.len == 0) {
-        normalized = "<html></html>";
+        // Parse XML into XMLDocument.
+        const Parser = @import("../parser/Parser.zig");
+        var parser = Parser.init(page.arena, doc.asNode(), page);
+        parser.parseXML(html);
+
+        if (parser.err) |pe| {
+            return pe.err;
+        }
+
+        return .{ .xml_document = doc };
     }
 
-    // Parse HTML into the document
-    const Parser = @import("../parser/Parser.zig");
-    var parser = Parser.init(page.arena, doc.asNode(), page);
-    parser.parse(normalized);
-
-    if (parser.err) |pe| {
-        return pe.err;
-    }
-
-    return doc;
+    return error.NotSupported;
 }
 
 pub const JsApi = struct {
diff --git a/src/html5ever/Cargo.lock b/src/html5ever/Cargo.lock
index 60c82b59..d94a7fd7 100644
--- a/src/html5ever/Cargo.lock
+++ b/src/html5ever/Cargo.lock
@@ -72,6 +72,7 @@ dependencies = [
  "tikv-jemalloc-ctl",
  "tikv-jemallocator",
  "typed-arena",
+ "xml5ever",
 ]
 
 [[package]]
@@ -476,3 +477,13 @@ name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "xml5ever"
+version = "0.35.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee3f1e41afb31a75aef076563b0ad3ecc24f5bd9d12a72b132222664eb76b494"
+dependencies = [
+ "log",
+ "markup5ever",
+]
diff --git a/src/html5ever/Cargo.toml b/src/html5ever/Cargo.toml
index 7cc94245..b4004404 100644
--- a/src/html5ever/Cargo.toml
+++ b/src/html5ever/Cargo.toml
@@ -14,6 +14,7 @@ string_cache = "0.9.0"
 typed-arena = "2.0.2"
 tikv-jemallocator = {version = "0.6.0", features = ["stats"]}
 tikv-jemalloc-ctl = {version = "0.6.0", features = ["stats"]}
+xml5ever = "0.35.0"
 
 [profile.release]
 lto = true
diff --git a/src/html5ever/lib.rs b/src/html5ever/lib.rs
index 308001de..59ef6890 100644
--- a/src/html5ever/lib.rs
+++ b/src/html5ever/lib.rs
@@ -16,20 +16,20 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-mod types;
 mod sink;
+mod types;
 
 #[cfg(debug_assertions)]
 #[global_allocator]
 static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
 
-use types::*;
 use std::cell::Cell;
 use std::os::raw::{c_uchar, c_void};
+use types::*;
 
-use html5ever::{parse_document, parse_fragment, QualName, LocalName, ns, ParseOpts, Parser};
-use html5ever::tendril::{TendrilSink, StrTendril};
 use html5ever::interface::tree_builder::QuirksMode;
+use html5ever::tendril::{StrTendril, TendrilSink};
+use html5ever::{ns, parse_document, parse_fragment, LocalName, ParseOpts, Parser, QualName};
 
 #[no_mangle]
 pub extern "C" fn html5ever_parse_document(
@@ -135,13 +135,14 @@ pub extern "C" fn html5ever_parse_fragment(
 
     let bytes = unsafe { std::slice::from_raw_parts(html, len) };
     parse_fragment(
-        sink, Default::default(),
+        sink,
+        Default::default(),
         QualName::new(None, ns!(html), LocalName::from("body")),
-        vec![],     // attributes
-        false,      // context_element_allows_scripting
+        vec![], // attributes
+        false,  // context_element_allows_scripting
     )
-        .from_utf8()
-        .one(bytes);
+    .from_utf8()
+    .one(bytes);
 }
 
 #[no_mangle]
@@ -182,15 +183,15 @@ pub struct Memory {
 #[cfg(debug_assertions)]
 #[no_mangle]
 pub extern "C" fn html5ever_get_memory_usage() -> Memory {
-    use tikv_jemalloc_ctl::{stats, epoch};
+    use tikv_jemalloc_ctl::{epoch, stats};
 
     // many statistics are cached and only updated when the epoch is advanced.
     epoch::advance().unwrap();
 
-    return Memory{
+    return Memory {
         resident: stats::resident::read().unwrap(),
         allocated: stats::allocated::read().unwrap(),
-    }
+    };
 }
 
 // Streaming parser API
@@ -225,9 +226,8 @@ pub extern "C" fn html5ever_streaming_parser_create(
     // SAFETY: We're creating a self-referential structure here.
     // The arena is stored in the StreamingParser and lives as long as the parser.
     // The sink contains a reference to the arena that's valid for the parser's lifetime.
-    let arena_ref: &'static typed_arena::Arena<sink::ElementData> = unsafe {
-        std::mem::transmute(arena.as_ref())
-    };
+    let arena_ref: &'static typed_arena::Arena<sink::ElementData> =
+        unsafe { std::mem::transmute(arena.as_ref()) };
 
     let sink = sink::Sink {
         ctx: ctx,
@@ -281,7 +281,8 @@ pub extern "C" fn html5ever_streaming_parser_feed(
 
             // Feed the chunk to the parser
             // The Parser implements TendrilSink, so we can call process() on it
-            let parser = streaming_parser.parser
+            let parser = streaming_parser
+                .parser
                 .downcast_mut::<Parser<sink::Sink>>()
                 .expect("Invalid parser type");
 
@@ -304,7 +305,8 @@ pub extern "C" fn html5ever_streaming_parser_finish(parser_ptr: *mut c_void) {
     let streaming_parser = unsafe { Box::from_raw(parser_ptr as *mut StreamingParser) };
 
     // Extract and finish the parser
-    let parser = streaming_parser.parser
+    let parser = streaming_parser
+        .parser
         .downcast::<Parser<sink::Sink>>()
         .expect("Invalid parser type");
 
@@ -326,3 +328,57 @@ pub extern "C" fn html5ever_streaming_parser_destroy(parser_ptr: *mut c_void) {
         let _ = Box::from_raw(parser_ptr as *mut StreamingParser);
     }
 }
+
+#[no_mangle]
+pub extern "C" fn xml5ever_parse_document(
+    xml: *mut c_uchar,
+    len: usize,
+    document: Ref,
+    ctx: Ref,
+    create_element_callback: CreateElementCallback,
+    get_data_callback: GetDataCallback,
+    append_callback: AppendCallback,
+    parse_error_callback: ParseErrorCallback,
+    pop_callback: PopCallback,
+    create_comment_callback: CreateCommentCallback,
+    create_processing_instruction: CreateProcessingInstruction,
+    append_doctype_to_document: AppendDoctypeToDocumentCallback,
+    add_attrs_if_missing_callback: AddAttrsIfMissingCallback,
+    get_template_contents_callback: GetTemplateContentsCallback,
+    remove_from_parent_callback: RemoveFromParentCallback,
+    reparent_children_callback: ReparentChildrenCallback,
+    append_before_sibling_callback: AppendBeforeSiblingCallback,
+    append_based_on_parent_node_callback: AppendBasedOnParentNodeCallback,
+) -> () {
+    if xml.is_null() || len == 0 {
+        return ();
+    }
+
+    let arena = typed_arena::Arena::new();
+
+    let sink = sink::Sink {
+        ctx: ctx,
+        arena: &arena,
+        document: document,
+        quirks_mode: Cell::new(QuirksMode::NoQuirks),
+        pop_callback: pop_callback,
+        append_callback: append_callback,
+        get_data_callback: get_data_callback,
+        parse_error_callback: parse_error_callback,
+        create_element_callback: create_element_callback,
+        create_comment_callback: create_comment_callback,
+        create_processing_instruction: create_processing_instruction,
+        append_doctype_to_document: append_doctype_to_document,
+        add_attrs_if_missing_callback: add_attrs_if_missing_callback,
+        get_template_contents_callback: get_template_contents_callback,
+        remove_from_parent_callback: remove_from_parent_callback,
+        reparent_children_callback: reparent_children_callback,
+        append_before_sibling_callback: append_before_sibling_callback,
+        append_based_on_parent_node_callback: append_based_on_parent_node_callback,
+    };
+
+    let bytes = unsafe { std::slice::from_raw_parts(xml, len) };
+    xml5ever::driver::parse_document(sink, xml5ever::driver::XmlParseOpts::default())
+        .from_utf8()
+        .one(bytes);
+}