Feature list

Rocket Validator is the easiest way to automatically scan your large sites in search for accessibility and HTML issues. Just enter a starting URL and click a button - our web spider will do the rest.

Below is a list of the main features that you get when you sign up for a Rocket Validator account.

Intuitive Web Interface

Generating a validation report for your sites is as simple as entering the starting URL and clicking a button. No need to set up any code on your side, just use our intuitive UI to get results in seconds.

Take a look at the Quick Start guide.

API integration

Our JSON API lets you easily integrate site-wide accessibility and HTML checking into your existing tools, dashboards and workflows.

Read more at the API documentation.

Accessibility Validation

Rocket Validator performs accesibility checking on your pages using the axe-core accessibility engine, hosted on our own servers. No need to install anything on your sites. Read more at the Accessibility checking guide.

HTML5 Validation

Rocket Validator checks the HTML markup of your web pages using the Nu HTML Checker by the W3C, hosted on our own servers. Read more at the HTML checking guide.

Muting Rules

Rocket Validator lets you selectively mute issues that you're not going to fix - for example when it's caused by 3rd party software, or marked as low priority on your to-do list. Read more at the Muting issues guide.

Configurable Rate Limits

Set the rate limit you want for your reports. From 1 request per second up to 25 requests per second. Read more at the Rate limits guide.


Schedule as many validations as you need. Just enter the URL to be validated, how many pages to check, and how often you want us to check your sites (daily, weekly or monthly). We'll take care of running the checks and notify you when your report is ready. Read more at the Scheduling validations and deploy hooks guide.

Deploy Hooks

Validate automatically your sites as soon as you deploy a new version. Just set up a deploy hook to notify Rocket of a new deploy and have the validation start automatically. Read more at the Scheduling validations and deploy hooks guide.

Validation Charts

Check out your progress with the validation charts that show the evolution of issues in your pages over time. Read more at the Validation charts guide.

Rocket Validator will crawl your submitted sites in search for pages to validate. Starting with the submitted URL, it will collect the internal links and then it wil visit those links in search for more internal links. This way, we can get thousands of pages from your sites in minutes.

XML Sitemap Parsing

If you prefer a greater control over the exact URLs that you want to validate on your site, you can submit an XML sitemap instead of your home page URL. Here is a reference of the syntax expected on an XML sitemap, and here is an XML sitemaps Generator.

Summary Report

All the HTML issues found on your web pages are grouped together and put in a nicely formatted summary report where you see how each different issue affects your whole site. You get the big picture, so you can fix issues globally, instead of having to go page by page. Read more at the Summary reports guide.

Per-URL Report

You get a specific, per-URL report where you can see the errors and warnings for each individual page, and re-check as needed.

If our web scraper can't reach some of the internal pages on your validated site, these unreachable pages will be shown on a dedicated tab so you can know where they were linked from and fix the broken link. Read more at the Broken links guide.


At Rocket Validator, we also believe that speed is a feature. When you submit a site for validation, you'll typically get the full validation report in minutes, not hours or days. The average validation time for a 1000 pages site is under 2 minutes. When you re-check individual web pages, you get the results inmediately.

Shareable Reports

Any site validation report that you generate can be easily shared with your colleagues or clients. Just share its URL and they'll be able to see all the validation results - but only you can re-check web pages. You can, for example, send them a first report before you start working on fixing a site, and then share a later report to show how many HTML issues are gone after your work!