What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

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    Sign up form defence

    Asked by Konstantin  on June 20, 2017 at 02:51 AM


    can you please specify do you have any kind of protection from DDOS

    or other attacks on a signup form or web site where that form is located.


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    Answered by OzanDost on June 20, 2017 at 03:07 AM

    Hello Konstantin,


    Here is a quote from previous answer:

        "Let me tell you that, Jotform has a very powerful cloud of servers whose storage is encrypted and       provides security protection against malicious attacks like SQL injection and denial of service (DDOS) attacks."

    You can read more about the issue from here.


    Also here is a blog post written by the lead developer of Jotform.


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    Answered by Konstantin  on June 20, 2017 at 04:43 AM
    Hello OzanDost!
    Thank you for the reply.
    But what about the multiple submit requests on the the sign up form?
    Let consider such case -- I create a subscription form, place the code on my side
    and someone makes a hundred requests to subscribe via the form. Nowadays there are
    lots of bots that can attack forms on a website, so tons of emails will be sent from my form
    Do you provide ( maybe within form builder ) ant kind of protection from such threads ?
    Best regards,
  • Profile Image
    JotForm Support

    Answered by John_Benson on June 20, 2017 at 05:06 AM

    I recommend features and widget to fight spammers, spambots or multiple submissions to your form. Here's the list:

    1. CAPTCHA field - https://www.jotform.com/help/205-How-to-Add-a-Captcha-Field

    2. Google reCaptcha widget - https://widgets.jotform.com/widget/google_recaptcha

    3. Unique Submission feature - https://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form

    4. Unique Question feature - https://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question

    Please choose one or more to add it to your form. After that, if you have questions or need clarifications, don't hesitate to ask us. We're here to help.

    Thank you.