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.

  • Profile Image

    Unable to submit form. It shows "502 Bad Gateway" error message.

    Asked by bbitzer on July 13, 2017 at 12:14 PM

    This has happened in the past couple of weeks and I can't alleviate the problem. 

    All users on browsers that both have visited or never visited the forms are seeing one of two errors. I have also cleared the caches on the JotForm account settings end.

    "502 Bad Gateway nginx"

    "Upload Error"


    Is there anything you can see with these forms (one of which I cloned to test) that could be contributing to this? My other forms are working as anticipated, still.

    Page URL:

  • Profile Image
    JotForm Support

    Answered by ashwin_d on July 13, 2017 at 02:15 PM

    Hello bbitzer,

    I'm sorry for the trouble caused to you. 

    I did test your form and I am able to replicate the issue you are having. It shows "502 Bad Gateway" error message.

    Upon taking a closer look at your form, I found that you have integrated it with FTP which is sending the uploads to your FTP server. I would suggest you to please check your FTP credential which you have used in your form's submission page. The best solution would be to remove the existing FTP integration and integrate again. 

    Thank you!