html5lib in Pure Dart

This is a pure Dart html5 parser. It's a port of html5lib from Python. Since it's 100% Dart you can use it safely from a script or server side app.

Eventually the parse tree API will be compatible with dart:html, so the same code will work on the client and the server.


Add this to your pubspec.yaml (or create it):

  html5lib: any

Then run the Pub Package Manager (comes with the Dart SDK):

pub install


Parsing HTML is easy!

import 'package:html5lib/parser.dart' show parse;
import 'package:html5lib/dom.dart';

main() {
  var document = parse(
      '<body>Hello world! <a href="">HTML5 rocks!');

You can pass a String or list of bytes to parse. There's also parseFragment for parsing a document fragment, and HtmlParser if you want more low level control.

Running Tests

# From Dart SVN checkout
./tools/ -m release
./tools/ -m release html5lib
./tools/ -m release -r drt html5lib


A simple tree API that results from parsing html. Intended to be compatible with dart:html, but right now it resembles the classic JS DOM.
This library contains extra APIs that aren't in the DOM, but are useful when interacting with the parse tree.
This library has a parser for HTML5 documents, that lets you parse HTML easily from a script or server side application: [...]
This library adds dart:io support to the HTML5 parser. Call initDartIOSupport before calling the parse methods and they will accept a RandomAccessFile as input, in addition to the other input types.