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    Passmarked is a suite of tests that can be run against any page/website to identify issues with parity to most online tools in one package.

    The Terminal Client is intended for use by developers to integrate into their workflow/CI servers but also integrate into their own application that might need to test websites and provide realtime feedback.

    All of the checks on Passmarked can be voted on importance and are open-sourced, to encourage community involvement in fixing and adding new rules. We are building the living Web Standard and love any contributions.


    The rules checked in this module are:

    • applet - The page contains Java Applets in either it's HAR / Page Content / Javascript or detected Stack.
    • flash - The page contains Flash in either it's HAR / Page Content / Javascript or detected stack.
    • silverlight - The page contains Silverlight in either it's HAR / Page Content or detected stack.

    The w3c service produces a large list of rules as well, these rules are cleaned and generated a key according to output. So it's a bit hard to list all the UID's that can be used, the best move is to check passmarked.com/library/html for the complete list of rules that can be produced and to something specific that you might be looking for.


    The rules are checked everytime a url is run through Passmarked or our API. To run using the hosted system head to passmarked.com or our Terminal Client use:

    npm install -g passmarked
    passmarked --filter=html example.com

    The hosted version allows free runs from our homepage and the option to register a site to check in its entirety. Using the Passmarked npm module (or directly via the API) integrations are also possible to get running reports with all the rules in a matter of seconds.

    Running Locally

    All rules can be run locally using our main integration library. This requires installing the package and any dependencies that the code might have such as a specific version of Openhtml, see #dependencies

    First ensure passmarked is installed:

    npm install passmarked
    npm install @passmarked/html

    After which the rules will be runnable using promises:

      require('@passmarked/html'), // this package
      require('@passmarked/css'), // to test css
      require('@passmarked/network') // to test network performance
      url: 'http://example.com',
      body: 'body of page here',
      har: {log: {entries: []}}
    }).then(function(payload) {
      if (payload.hasRule('secure')) {
        console.log('better check that ...');
      var rules = payload.getRules();
      for (var rule in rules) {
        console.log('*', rules[rule].getMessage());

    Alternatively, callbacks are also available:

      require('@passmarked/html'), // this package
      require('@passmarked/css'), // test css
      require('@passmarked/network') // test network performance
      url: 'http://example.com',
      body: 'body of page here',
      har: {log: {entries: []}}
    }, function(err, payload) {
      if (payload.hasRule('secure')) {
        console.log("better check that ...");
      var rules = payload.getRules();
      for (var rule in rules) {
        console.log('*', rules[rule].getMessage());


    The module requires access to a running version of the VNU validator from W3C. To confingure the module looks for the `` environment variable which will overide the default.


    Other open hosting options include:

    By default the module uses https://checker.html5.org, which is one of the free hosted versions provided, but be aware of limits as they are open and everyone can use them ...

    If you are like us and expect higher loads, Passmarked runs a internallly hosted version of the service that we scale, the docker build for which has been open sourced over at github.com/passmarked/vnu. Using this file with the following gives you a fully running VNU service on Alpine OS that can be used:

    docker build --tag=passmarked/vnu:latest .
    docker run tag=passmarked/vnu:latest

    Or even easier look into deploying it on services like App Engine to remove the management from yourself.


    Rules represent checks that occur in this module, all of these rules have a UID which can be used to check for specific rules. For the structure and more details see the Wiki page on Rules.

    Rules also include a type which could be critical, error, warning or notice giving a better view on the importance of the rule.


    git clone git@github.com:passmarked/html.git
    npm install
    npm test

    Pull requests have a prerequisite of passing tests. If your contribution is accepted, it will be merged into develop (and then master after staging tests by the team) which will then be deployed live to passmarked.com and on NPM for everyone to download and test.


    To learn more visit:


    Copyright 2016 Passmarked Inc

    Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


    Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


    npm i @passmarked/html

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