These terms of service (together with the documents referred to in it) tell you the terms of use on which you may make use the web site ('Service'), whether as a guest or a registered user. If you are entering into this agreement on behalf of a company or other legal entity, you represent that you have the authority to bind such entity, its affiliates and all users who access our services through your account to these terms and conditions, in which case the terms 'You' or 'Your' shall refer to such entity, its affiliates and users associated with it. If you do have such authority, or if you do not agree to these terms of use, you must not use this service.

We may revise these terms of use at any time by amending this page. Please check this page from time to time to take notice of any changes we made, as they are binding on you.

Violation of any of the terms below will result in the termination of your Account.

Account Terms

  1. You must be a human. Accounts registered by any automated method is not permitted.

  2. You must be 13 years or older to use this Service.

  3. You must provide a valid email address, and any other information requested in order to complete the signup process.

  4. Maintaining the security of your account and password is your responsibility, and we are not responsible for any loss or damage arising from unauthorized access to your account.

  5. You are fully responsible for any activities that occur on your account even if unauthorized. You must notify us immediately of any unauthorized use of your account.

  6. Your account may only be used by one person - you are not allowed to share a single account between multiple people.

  7. You may not use the Service for any illegal or unauthorized purpose. You must not, in the use of the Service, violate any laws in your jurisdiction.


  1. The service offers subscriptions for sale. These subscriptions are paid for in recurring instalments.

  2. An active subscription will automatically become inactive if an account fails to meet the recurring payments for it.

  3. An active paid subscription gives unlimited access to helpful resources around the topic of critical css and website performance.The subscription account only provides information. It is up to you to act on the information provided to get the website performance benefits described on the Service.

  4. An active paid subscription includes support, related to the topic of critical css. This support is provided on the site in terms of help content, and via email, in English. This support is limited in terms of specific technical advice on how to practically implement critical css for your particular webite(s).

  5. We are not affiliated with any website performance diagnostic websites such as Google Pagespeed Insights. We do not guarantee that usage of the Service will improve your website rating on websites like these.

  6. We do not guarantee that the Service, or any content on it, will always be available or be uninterrupted, nor that it will be free from errors or omissions.

Payments, refund, upgrading and downgrading

  1. For monthly payment plans, the Service is billed in advance on a monthly basis.

  2. For any upgrade or downgrade in subscription plan while on a billing cycle, the bank card that you provided will automatically be charged the new rate on your next billing cycle. In addition, the next bill will include a prorated charge or refund of the difference in plan cost.

  3. Full refunds are issued only for subscriptions that are cancelled within 30 days after being created. No other refunds are given. There will be no refunds or credits for partial months of service, or for months unused with an open account.

  4. When an inactive subscription is resumed, we immediately charge you the subscription fee.


  1. You are solely responsible for properly canceling your account. An email or contact message request to cancel your account is not considered cancellation. You can cancel your account at any time by clicking on the Account link in the global navigation bar at the top of the screen. The Account screen contains a 'Cancel subscription' button.

  2. If you cancel your subscription on the Service before the end of your current paid billing period, your cancellation will take effect immediately, and you will not be charged again.

  3. The content of your account, i.e. your critical css files, will still be available for you to access after cancellation.

Changes to Service and Prices

  1. We reserve the right at any time and from time to time to modify or discontinue, temporarily or permanently, the Service (or any part thereof) with or without notice.

  2. Any of the website content on the Service may be out of date at any given time, and we are under no obligation to update it.

  3. Prices of all Services, including but not limited to monthly subscription plan fees to the Service, are subject to change upon 30 days notice from us. Such notice may be provided at any time by posting the changes to this website (

  4. We shall not be liable to you or to any third-party for any modification, price change, suspension or discontinuance of the Service.

General Conditions

  1. These terms of service shall be governed by and construed in accordance with the laws of England. The English courts shall have non-exclusive jurisdiction over any dispute arising from or in connection with these terms of use.

  2. You must not post, upload or transmit to or from the Service any material: (a) for which you have not obtained all necessary licenses and/or approvals; or (b) which constitutes or encourages conduct that would be considered a criminal offense, give rise to civil liability, or otherwise be contrary to the law of or infringe the rights of any third party, in any country in the world; or (c) which is technically harmful (including, without limitation, computer viruses, logic bombs, Trojan horses, worms, harmful components, corrupted data or other malicious software or harmful data). You must not misuse the Service (including, without limitation, by hacking).

  3. You agree not to reproduce, duplicate, copy, sell, resell or exploit any portion of the Service, use of the Service, or access to the Service without the express written permission by us.

  4. We have no liability to you for any loss of profit, sales, revenue or business; business interruption; loss of business opportunity; goodwill or reputation; or any indirect or consequential loss or damage.

  5. You understand that we use third-party vendors and hosting partners to provide the necessary hardware, software, networking, storage, and related technology required to run the Service.

  6. We will co-operate fully with any law enforcement authorities or court order requesting or directing us to disclose the identity or locate anyone posting any material in breach of these terms of use.

  7. If you have questions about the Terms of Service, please send them to [email protected].

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