rocketvalidator.com

Website Description

📝

Rocket Validator: how to quickly check a site for errors without unnecessary nerves

Developers know this pain. You do a big project, and then it turns out that somewhere deep in the code there is a critical accessibility error or incorrect HTML. Manually checking thousands of pages is hell. This is where Rocket Validator comes into the picture. This is a service that promises to find all accessibility and HTML validity issues in seconds. Sound like magic? Almost. The main feature of this tool is automation. You don't have to sit and click on every link. You simply provide the starting URL, and the built-in web crawler begins its work. It checks up to 5000 pages in one report. This is very convenient for large sites where manual verification would take days.

What exactly does it check?

The service uses two powerful engines:

W3C Validator (Nu):looks for errors in HTML and CSS. This is the industry standard.
Ax Core:specializes in accessibility (A11Y). Checks how accessible your site is for people with disabilities.

It is important to note that they own the servers for verification. This means you won't encounter high-load blockages that can sometimes occur when using public APIs.

Reports you can understand

Many tools give you a bunch of technical junk. Rocket Validator tries to be simpler. They group common problems and prioritize them. You see the most important things first. The reports contain contextual code snippets to make it clear where exactly the error is. Plus there are tips on how to fix it. There is another cool feature - device emulation. A website may look great on a laptop, but fall apart on an iPhone or Samsung Galaxy tablet. You can select a specific device (for example, iPhone 12 or iPad Air), and the service will check the site with the correct screen resolution, scaling and User Agent. This helps to find floating bugs that only appear on mobile devices.

For teams and automation

If you work in a team, there is the ability to create guest accounts. Colleagues can use your verification credits without having access to your main account. Security is also high: if you have closed pages (staging, development), you can configure Basic HTTP Authentication. Passwords are encrypted before being saved. There is also a planner. You can set up daily, weekly or monthly checks. The results will be sent by email. And if you use Netlify, Heroku or GitHub Pages, you can set up triggers (hooks). As soon as you make a deployment, the site is automatically checked. This saves a lot of time.

Frequently asked questions (FAQ)

Questions about the service

How many pages can be checked at a time?

One report can contain data on checking up to 5000 web pages. This is usually sufficient for most medium to large projects.

Is it possible to verify a site that requires a password?

Yes, Basic HTTP Authentication is supported. You can specify a login and password to test protected areas of the site, for example, test environments.

What devices can you emulate viewing on?

Popular models are supported: iPhone (11, 12, 13, SE), iPad (Air, Mini, Pro), Samsung Galaxy, Lumia 950, Kindle Fire HDX and laptops with HiDPIMDPI screens.

How often can scans be run?

You can set up a schedule: daily, weekly or monthly. It is also possible to run a check automatically after each deployment via webhooks.

Who uses validation engines?

W3C Validator Nu is used for HTML and CSS, and Ax Core is used for accessibility. Both tools are industry standards.

.

Main Information

ℹ️

Title: Rocket Validator . Fastest Site Validation

Description: Rocket Validator finds Accessibility and HTML issues in your large sites, in seconds. Get your site scanned by Axe Core and W3C Validator with just one click.

Keywords: empty

Page Encoding: utf-8

Page Filesize: 57 KB

Server Information

🖥️

IP: 66.241.124.65

Location: United States,US,,00004,31.6941,-89.1306,America/Chicago

Http Server: fly/b59e3505 (2026-05-27)

Encoding: utf-8

Meta Tags List

🏷️

charset: utf-8
name: viewport content: width=device-width, initial-scale=1.0
equiv: X-UA-Compatible content: ie=edge
name: description content: Rocket Validator finds Accessibility and HTML issues in your large sites, in seconds. Get your site scanned by Axe Core and W3C Validator with just one click.
property: og:type content: website
property: og:title content: Rocket Validator . Fastest Site Validation
property: og:description content: Rocket Validator finds Accessibility and HTML issues in your large sites, in seconds. Get your site scanned by Axe Core and W3C Validator with just one click.
property: og:url content: https://rocketvalidator.com/
property: og:image content: https://rocketvalidator.com/images/og_image_fallback.png
property: og:image:alt content: Rocket Validator . Fastest Site Validation
content: UhEOETA9KH8mMRssJTEQNwYBKhkkPApn4tdSGQB0SXwztHbrSJLrGX2S name: csrf-token
name: twitter:card content: summary
name: twitter:site content: @rocketvalidator
name: twitter:title content: Rocket Validator . Fastest Site Validation
name: twitter:description content: Rocket Validator finds Accessibility and HTML issues in your large sites, in seconds. Get your site scanned by Axe Core and W3C Validator with just one click.

Internal Links

🔗

External Links

🌐

Whois Information

📄

domain_name: rocketvalidator.com

update_date: 2026-05-13T13:47:27Z

update_time: 1778680047

creation_date: 2015-11-27T16:08:35Z

creation_time: 1448640515

expiration_date: 2028-11-27T16:08:35Z

Whois Raw Data

📋

            Domain Name: ROCKETVALIDATOR.COM
Registrar: 1API GmbH
Domain Status: client transfer prohibited
Creation Date: 2015-11-27T16:08:35Z
Registry Expiry Date: 2028-11-27T16:08:35Z
Updated Date: 2026-05-13T13:47:27Z
Name Server: NS1.DNSIMPLE-EDGE.COM
Name Server: NS2.DNSIMPLE-EDGE.NET
Name Server: NS3.DNSIMPLE-EDGE.IO
Name Server: NS4.DNSIMPLE-EDGE.ORG
REGISTRAR Contact: 1API GmbH
>>> Last update of RDAP database: 2026-08-01T20:51:04Z

Robots.txt

🤖

			User-Agent: *
Sitemap: https://rocketvalidator.com/sitemap.xml
Disallow: /s/*
Disallow: /stats/*

User-agent: barkrowler
Disallow: /s

SEO Audit

🔍

Technical SEO

✓

Response Code

200

Status 200 OK - page loads correctly.

✓

Character Encoding

Page: utf-8, Header: utf-8

Character encoding consistent between HTML and headers.

✓

Page Size

58928 bytes

Page size acceptable for fast loading.

✓

Resources

40 total

Moderate number of resources. Consider combining files.

✓

Hreflang Tags

0 hreflang tags

Add hreflang tags if you have multilingual content.

✓

Robots.txt

Exists

Robots.txt file found.

✓

Sitemap

Declared in robots.txt

Sitemap declared in robots.txt.

✓

HTTPS

Yes

Secure HTTPS connection enabled.

✓

Compression

gzip

Gzip or Zstd compression enabled for faster loading.

✓

Caching

max-age=0, private, must-revalidate

Cache-control headers properly set.

✓

Page Speed

4.26 ms

Excellent loading speed.

On-Page SEO

✓

Title

Rocket Validator . Fastest Site Validation

Good title length (30-60 characters).

✓

Meta Description

Rocket Validator finds Accessibility and HTML issues in your large sites, in seconds. Get your site scanned by Axe Core and W3C Validator with just one click. Lenght:158

Good meta description length (100-160 characters).

✓

H1 Heading

1 found - "Fast accessibility checking for large websites"

Good - single H1 heading found.

✓

Word Count

1832

Good content length (500-2000 words recommended).

!

Canonical Tag

Add canonical tag to prevent duplicate content issues.

✓

Duplicate Meta

[]

No duplicate meta tags found.

✓

Keywords

empty

Meta keywords set (note: not used by major search engines).

Content and UX

✓

Language

en

Language attribute properly set.

✓

Images

27 total, 0 missing ALT

All images have proper ALT text.

✓

Viewport

width=device-width, initial-scale=1.0

Viewport meta tag properly set for mobile devices.

✓

Open Graph

All OG tags present.

All essential OpenGraph tags present.

!

Structured Data

0 JSON-LD scripts

Add structured data (JSON-LD) for rich snippets and better SEO.

Search Phrases - Google

🔍

Position	Phrase	Page	Snippet
2	p seen	/html-validation/no-...	HTML check: No “p” element in scope but a “p” end tag seen. Guide describing the HTML issue detected by the W3C Validator: No “ p ” element in scope but a “ p ” end tag seen .
3	allowfullscreen	/html-validation/bad...	Bad value “true” for attribute “allowfullscreen” on element “ ... The allow attribute is the preferred approach going forward. It replaces allowfullscreen and can also control other permissions like camera, microphone, and ...
5	2000 svg	/html-validation/bad...	HTML check: Bad value “https://www.w3.org/2000/svg” for ... This is perfectly valid HTML5. You only need the xmlns attribute when the SVG is served as a standalone . svg file or used within an XHTML document.
8	svg xmlns	/html-validation/att...	Attribute with the local name “xmlns:svg” is not serializable ... The xmlns : svg attribute attempts to declare an additional prefixed namespace binding — essentially mapping the prefix svg : to the same namespace URI. This is ...
9	xmlns http www w3 org	/html-validation/bad...	HTML check: Bad value “http://www.w3.org/TR/REC-html40 ... The xmlns attribute declares the XML namespace for a document. The value http://www.w3.org/TR/REC-html40 is a URL that points to the old HTML 4.0 ...
9	http www w3 org 1999	/html-validation/bad...	HTML check: Bad value “https://www.w3.org/1999/xlink” for ... The only permitted value for the xmlns:link attribute is http://www.w3.org/1999/xlink . Although using https in the URL looks like it's going to be more secure.
16	style type html	/html-validation/the...	The “type” attribute for the “style” element is not needed ... The HTML < style > element contains style information for a document, or part of a document, defined in CSS. This element does not need the type attribute ...
17	expected html	/html-validation/alm...	HTML check: Almost standards mode doctype. Expected “ ... The page scanned is using an “almost standards mode” doctype, instead of the expected . While the almost standards mode was used in the ...
17	javascript script script src data	/html-validation/a-s...	HTML check: A “script” element with a “src” attribute must ... A “script” element with a “src” attribute must not have a “type” attribute whose value is anything other than the empty string, a JavaScript MIME type, or “ ...
21	content charset	/html-validation/bad...	Bad value “text/html Bad value “text/html

Additional Services

💎