Introducing Rocket Validator

TL;DR: we've just launched a new version of our HTML validator, called Rocket Validator, it's blazing fast, has cheaper subscription plans, and there's no limit on the number of pages you can validate.


Site Validator has grown fast over these last years, from a quick open source script to a full-fledged application used by web developers worldwide to check the markup of their sites.

Over these years, we've been adding (and sometimes removing) features to the app. Site Validator lets you now validate HTML, CSS and Accessibility on large sites, and as well trigger those validations via deploy hooks or programmed jobs.

Still, we felt that all these extra features were, maybe, too distracting. In practice, 95% of our users only validate HTML on their sites, but they:

  • Don't validate CSS. Because, CSS should be centralized in stylesheets, which are common to the whole site, so you shouldn't worry about validating CSS on thousands of pages from the same site.
  • Don't validate Accessibility. A11Y validation is a very important step in web development, but in practice most of our users haven't activated our Tenon integration, in part because that's extra work, in part because you need another paid account with them. In any case, as Tenon is getting ready to have their own site spider, our integration will no longer be needed to validate A11Y on large sites.
  • Don't set up Continuous Validation. This power feature lets you validate your sites after each deploy, or automate validations to happen periodically. But in practice, we've seen that the validation flow most of our users follow is validating the sites while developing them, and once everything is ready, deploy and forget - or validate manually from time to time when there are updates.

So, we decided to go back to our roots and focus on our most important feature: site-wide HTML validation. And always, keeping things as simple as possible.

The result of this decision is our brand new Rocket Validator, a separate project made by the Site Validator team, that lets you validate HTML on large sites without setting a limit on the number of validations, and at the fastest speed.


We also understood that our subscription plans were not optimized for many users that just needed to validate sites from time to time. Thinking on them, we've included weekly plans - ideal when you need only validate a site for the last days before a deploy.

Rocket Validator is open for everyone at affordable prices, starting as low as $6/week. Current Site Validator users can try it out at no cost, and switch to the new plans at any time.

Welcome to Rocket Validator, we hope to see you on board soon!

Checking A11Y on Large Sites with Tenon

Checking your site's accessibility is a very important issue to ensure you get to a broader audience.

Although A11Y checking has been a quite complicated issue, fortunately now we have powerful, modern tools to help us with this task. Tenon.io is, by far, the most complete tool for Accessibility checking, covering currently 90 A11Y audit rules and growing.

We've now integrated Tenon into Site Validator, so you can now check A11Y on your large sites. All you need to do is sign up for a Tenon account and enter your Tenon API Key into your Site Validator account.




Try Site Validator free for 14 days.

Accessibility Developer Tools Upgraded

We've upgraded our instances of AccessLint Server to the latest version, to provide you with the latest Accessibility audit rules.

There are the new rules added:

  • [AX_ARIA_08] Elements with ARIA roles must ensure required owned elements are present.
  • [AX_ARIA_09] Elements with ARIA roles must be in the correct scope.
  • [AX_ARIA_10] This element has an unsupported ARIA attribute.
  • [AX_ARIA_11] This element has an invalid ARIA attribute.
  • [AX_ARIA_12] This element does not support ARIA roles, states and properties.
  • [AX_FOCUS_01] These elements are focusable but either invisible or obscured by another element.
  • [AX_FOCUS_02] Elements with onclick handlers must be focusable.
  • [AX_HTML_02] An element's ID must be unique in the DOM.

Click here to see the full list (25 rules).

Accessibility checks

We've added Accessibility checks to our validation suite, so you can now easily validate A11Y on your sites.

The validation software we've chosen for this task are the Accessibility Developer Tools, an open source validator maintained by the Google Chrome Accessibility team, which is also available as a Chrome extension.

The Accessibility Developer Tools, ADT for short, check your pages against a series of A11Y audit rules, including checks about ARIA roles and attributes, uses of titles and alternative texts, and also check for the presence of captions in video elements and controls in audio elements, and even check the contrast ratio on the text to ensure it's legible.

A11Y checks are available for all Site Validator users, along with HTML and CSS validation.

Try Site Validator free for 14 days.

Scheduled validations

Last month we introduced the continuous validation feature, that lets you set up automatic validations when your site changes.

Now, we've made it easier for everyone by introducing scheduled validations. You can now define HTML and CSS validations to be run on your sites, with a defined schedule.

For example, you can set up a weekly HTML validation of 500 pages on one site, and a monthly CSS validation on another. This is completely flexible and up to your needs, you can define what kind of validations you want to run and set a daily, weekly or monthly schedule for those.

Scheduled validation screenshot

Site validation results will be automatically delivered to your inbox.

Sign up now and start validating large sites, completely free during 14 days.

Continuous Validation

Automating validations for your sites just got easier!

We've just released Continuous Validation, that lets you specify site-wide HTML and CSS validations on your sites to be run automatically after you deploy a new version of your site.

To set up automatic validations for your sites, you just need to define what validations should be run, and instruct your hosting platform to notify us via a webhook.

Most modern hosting platforms now include webhooks and we're documenting how to integrate many of them, like Netlify, Heroku or Cloud 66.

Check out the documentation to get up and running in minutes.

14-day free trial

You can now try all the features of Site Validator completely free during 14 days!

We want you to be able to validate HTML and CSS on large sites, and keep an unlimited history of site validations, so you experience the true power of Site Validator.

That's why we've decided to give a risk-free, non-credit card required, 14-day free trial.

Just pick a plan and you won't be charged anything until the trial period is over. And if you don't want to continue your subscription, you won't be charged at all!


Start 14-day Free Trial

Unlimited storage of site reports

On December we announced the possibility of storing a history of your site validation reports, and on January we increased the number of site reports you could store.

We're happy to announce now that all users with an active subscription will have unlimited storage for site reports. This will be specially useful when you want to review a history of changes in your site, and see how markup validation has improved on a particular site.

Also, on the following days we'll be releasing an exciting new feature called Continuous Validation, that will let you define automatic validations on your sites when you deploy a new version. More to come next week, but you'll surely benefit from unlimited storage when you try this new feature!

New interface for site cards

Now that Site Validator lets you store old versions of your site validations, and now that we've increased the number of reports you can store, the sitemaps list for most users started to grow too much.

To make it easier for you to focus on work being done on a particular site, we've grouped together the site validation reports per host, so now you can quickly see the current status of each site, in the form of these little site cards:

Site card example

Site cards let you see at a glance the status of a site, and quickly access and manage the site validations for each site. It's now also easier to remove several site validations reports, just check the ones you want to remove and click the "Delete" button, or remove the entire site directly from the card.

Store more validations

Last month we announced that you can now store old versions of your site validations.

We've now increased the number of site validations that you can store:

  • Starter subscriptors can now store up to 50 reports (was 10).
  • Freelancer subscriptors can now store up to 500 reports (was 50).
  • Studio subscriptors can now store up to 2,000 reports (was 300).

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