Skip to main content

Terms of Service

The following terms and conditions govern all use of the website (“The Website”) and all content, services and products available at or through the website. The Website is owned and operated by Lighthouses SCP (“The Developer”). The Website is offered subject to your acceptance without modification of all of the terms and conditions contained herein and all other operating rules, policies and procedures that may be published from time to time on this Website by The Developer (collectively, the “Agreement”).

Please read this Agreement carefully before accessing or using the Website. By accessing or using any part of the Website, you agree to become bound by the terms and conditions of this agreement. If you do not agree to all the terms and conditions of this agreement, then you may not access the Website or use any of its services. If these terms and conditions are considered an offer by The Developer, acceptance is expressly limited to these terms.

1.- Description of the service. is a web application that lets you submit several URLs for markup checking using third-party, open source software like the “Nu HTML Checker (”, taken from and the axe-core accessibility engine, taken from, which we’ll now refer to as the “Checkers”.

The software for the Checkers is not created nor maintained by the Developer. acts as an intermediary between You and the Checkers, so when you submit a URL to, this initial URL will be scraped in search for links, most of which will then be submitted to the Checkers.

The spider will visit the initial URL provided by You, and it may also follow any link found on this visit, and may do this recursively on the links found on the linked URLs.

The spider will request this information making GET requests, passing along any parameters it might find on the scraped links. It will not take into consideration the robots.txt exclusions, and will follow any public link found on the site. You’re responsible for any side effects this may trigger on the scraped website, and you should protect these actions appropiately.

The submitted URLs, and all URLs found from it on the spidering process, as well as the generated report with their issues, are considered public data and so can be publicly reproduced on The Website. While we don’t actively announce these public URLs in our site, making them public allows you to easily share the reports generated for your submitted URLs with your colleagues. will show the information about issues returned by the Checkers, associated to the affected URLs. This is purely informational and should only be used as a guide, but not as a guarantee that the checked pages are or aren’t affected by the returned issues. The fact that hasn’t found any issue on a web page does not imply that the web page is free of issues; the fact that has found an issue on a web page does not imply that this issue really exists as it might be a false positive caused by a temporary situation of the checked web page or an error in the third-party Checkers.

2.- Associations.

  • is not associated with the W3C (creators of the Nu.HTML checker) in any way.
  • is a friend and partner of Deque Systems , and may use its referrals system.

3.- Your Account and Data.

If you create an account on the Website, you are responsible for maintaining the security of your account and data, and you are fully responsible for all activities that occur under the account and any other actions taken in connection with it. You must immediately notify The Developer of any unauthorized uses of your account or any other breaches of security. The Developer will not be liable for any acts or omissions by You, including any damages of any kind incurred as a result of such acts or omissions.

Users can have a host-guest relationship as specified in Appendix A. Guest Accounts.

3.1.- Personal information we hold.

When you create an account using the signup form you provide us the following information:

  • Name.
  • Email.
  • Password.

This information is needed to create a user account on Rocket Validator, so you can use the application and submit URLs to validate.

3.2.- Where we store your personal information and how long we keep it.

We store this data on a database server at, which the Rocket Validator application communicates directly with. Heroku also does periodic backups of the data.

If you want to remove your personal information from Rocket Validator, all you need to do is cancel your account through the Web interface, and your personal data will be automatically removed.

3.3.- Information we share with other companies.

In order to help us better understand your usage of Rocket Validator and communicate with you, we use the following third party services:

3.3.1.- SendGrid.

We use SendGrid to segment our users so we can tailor our communication with you and only send you what better fits you. To do this we share this information with SendGrid:

  • Name.
  • Email.
  • Subscription status . Including if you have an active subscription, if it’s Pro or Basic, if you’re on a trial, if you have cancelled subscriptions.
  • Usage . Including the number of sitemaps created, how many web pages were scraped, how many issues have been found on the URLs you submit.


We use Plausible Analytics to gather information about the visits to Rocket Validator, so we can know better where the visits come from. We don’t actively share any specific detail about you, and just include the generic stats script that they provide.

Plausible does not make use of tracking cookies, and their data servers are in Europe.

3.3.3.- Lemon Squeezy and FastSpring.

Lemon Squeezy and FastSpring are our Merchants of Record from where you purchase access to Rocket Validator. You can read more about both companies on point 4 of this document.

We only share with our Merchants of Record an internal unique ID associated with your user account, that lets us link your Rocket Validator account with the Merchants of Record account you later create. This way, the information you give our Merchants of Record is kept separate from the information we have in Rocket Validator.

3.3.4.- SendGrid and Fastmail.

We use SendGrid and Fastmail to communicate with you via email.

3.4.- Email marketing.

In order to keep you informed about new features, promotions and important announcements regarding Rocket Validator, we send occassional emails to our users. To do so we use external services like the mentioned above. If you don’t wish to receive such communications, you can unsubscribe using the links at the footer of those emails.

4.- Payment and Renewal.

4.1.- Purchase and Product Fulfillment.

Neither The Website nor The Developer sells You any product or service, handles any payment or processes any invoices.

Purchases and product fulfillment are made through our Merchants of Record, which are our authorized resellers of software and other digital products. Currently, we work with two Merchants of Record: Lemon Squeezy and FastSpring. You can read their terms and conditions on their websites:

4.2.- Paid Services.

Optional paid services are available on the Website (any such services, an “Upgrade”). By selecting an Upgrade you agree to pay our Merchants of Record the one time, daily, weekly, monthly or yearly subscription fees indicated for that service. Payments will be charged on a pre-pay basis on the day you sign up for an Upgrade and will cover the use of that service for a one time use, weekly, monthly or yearly subscription period as indicated. Upgrade fees are not refundable.

4.3.- Automatic Renewal.

Your Upgrade subscription will automatically renew and you authorize our Merchants of Record to collect the then-applicable fee for such Upgrade (as well as any taxes) using any credit card or other payment mechanism our Merchants of Record have on record for you. Subscriptions can be cancelled at any time in the Website.

5.- Intellectual Property.

This Agreement does not transfer from The Developer to you any The Developer or third party intellectual property, and all right, title and interest in and to such property will remain (as between the parties) solely with The Developer. Your use of the Website grants you no right or license to reproduce or otherwise use any The Developer or third-party trademarks.

6.- Advertisements.

The Developer reserves the right to display advertisements on the Website.

7.- Changes.

The Developer reserves the right, at its sole discretion, to modify or replace any part of this Agreement. It is your responsibility to check this Agreement periodically for changes. Your continued use of or access to the Website following the posting of any changes to this Agreement constitutes acceptance of those changes. The Developer may also, in the future, offer new services and/or features through the Website (including, the release of new tools and resources). Such new features and/or services shall be subject to the terms and conditions of this Agreement.

8.- Termination.

The Developer may terminate your access to all or any part of the Website at any time, with or without cause, with or without notice, effective immediately. If you wish to terminate this Agreement or your account (if you have one), you may simply discontinue using the Website. The Developer can terminate the Website immediately as part of a general shut down of the service.

9.- Disclaimer of Warranties.

The Website is provided “as is”. The Developer and its suppliers and licensors hereby disclaim all warranties of any kind, express or implied, including, without limitation, the warranties of merchantability, fitness for a particular purpose and non-infringement. Neither The Developer nor its suppliers and licensors, makes any warranty that the Website will be error free or that access thereto will be continuous or uninterrupted. You understand that you download from, or otherwise obtain content or services through, the Website at your own discretion and risk.

10.- Limitation of Liability.

In no event will The Developer, or its suppliers or licensors, be liable with respect to any subject matter of this agreement under any contract, negligence, strict liability or other legal or equitable theory for: (i) any special, incidental or consequential damages; (ii) the cost of procurement for substitute products or services; (iii) for interruption of use or loss or corruption of data; or (iv) for any amounts that exceed the fees paid by you to The Developer under this agreement during one (1) month period prior to the cause of action. The Developer shall have no liability for any failure or delay due to matters beyond their reasonable control. The foregoing shall not apply to the extent prohibited by applicable law.

11.- General Representation and Warranty.

You represent and warrant that (i) your use of the Website will be in strict accordance with this Agreement and with all applicable laws and regulations (including without limitation any local laws or regulations in your country, state, city, or other governmental area, regarding online conduct and acceptable content and (ii) your use of the Website will not infringe or misappropriate the intellectual property rights of any third party.

12.- Indemnification.

You agree to indemnify and hold harmless The Developer, its contractors, and its licensors, and their respective directors, officers, employees and agents from and against any and all claims and expenses, including attorneys’ fees, arising out of your use of the Website, including but not limited to your violation of this Agreement.

13.- Cookies.

Our website only uses cookies that are required for the application to work. A cookie is a small file of data that your browser stores, that helps us distinguish you from the rest of the users and do things like:

  • Remember you when you sign in, so you don’t have to log in every time.
  • Remember your preferences for the application.

We don't use tracking cookies of any kind, and only integrate external services that don't make use of tracking cookies.

By using our website you agree to our use of cookies.

14.- About Lighthouses SCP

Lighthouses SCP is a web development company, registered in Spain with NIF J55213292. We’re based in the beautiful city of Girona, and love developing Ruby and Elixir applications, walking by the seaside and talking to people so if you come visit please say hi!

15.- Miscellaneous.

This Agreement constitutes the entire agreement between The Developer and you concerning the subject matter hereof, and they may only be modified by a written amendment signed by an authorized executive of The Developer, or by the posting by The Developer of a revised version. Except to the extent applicable law, if any, provides otherwise, this Agreement, any access to or use of the Website will be governed by the laws of Spain.

Appendix A. Guest Accounts

If your current subscription status gives you access to the Guest Accounts feature, you can invite other Rocket Validator users to be your guests. In order to create this relationship, you as a host must create a Guest Account invitation and share its URL with your guest.

Once your guest signs up for an account and accepts the invitation, this user becomes your guest and will be able to make use of Rocket Validator Pro features without needing to create a subscription. Credit usage from the guest reports will be substracted from your account.

Guest Accounts are only allowed as free invitations at no monetary cost for the guests, so you as the host are explicitly forbidden to charge any amount of money in exchange for the Guest Account to the guest.

Appendix B. Affiliate Network Disclaimer

This appendix is intended to provide additional clarification regarding the affiliate network associated with our platform. The affiliate program is a collaborative effort managed entirely by our merchant of record, Lemon Squeezy. Please carefully review the following terms and conditions pertaining to the affiliate network:

  1. Affiliate Program Overview:

    The Website offers an affiliate network to reward individuals or entities (affiliates) who refer customers to our platform. Affiliates may earn a share of the revenue generated from customers they refer to our services.

  2. Management by Lemon Squeezy:

    The entire operation, management, and administration of the affiliate network are the sole responsibility of our designated merchant of record, Lemon Squeezy. This includes but is not limited to the tracking of affiliate commissions, payout calculations, and disbursements.

  3. Non-Involvement of the Website:

    The Website does not actively participate in the day-to-day operations of the affiliate network. We do not retain or manage records of individual affiliate commissions, nor are we responsible for the execution of affiliate payouts.

  4. Affiliate Registration and Terms:

    Individuals or entities interested in participating in the affiliate program must sign up directly through Lemon Squeezy. The terms and conditions governing the affiliate relationship, including but not limited to eligibility criteria, commission structure, and payment details, are exclusively defined by Lemon Squeezy. Affiliates are encouraged to review and adhere to Lemon Squeezy's affiliate terms, available at

  5. Limitation of Liability:

    As the affiliate network is managed by Lemon Squeezy, any concerns, disputes, or inquiries related to the affiliate program should be directed to Lemon Squeezy. The Website disclaims any liability arising from or related to the affiliate program, including but not limited to disputes between affiliates and Lemon Squeezy.

By using our platform and participating in the affiliate program, users acknowledge and agree to the terms outlined in this appendix. For any questions or concerns related to the affiliate program, please contact Lemon Squeezy directly.