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

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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

    Uploads Failing Every Time

    Asked by product_london on March 16, 2014 at 03:28 PM

    I have an upload page on the following link;


    File uploads can be anything from 200mb to 1gb.  When clients upload their files and make payment, the payment is coming through but the uploaded files are not. I've tried to upload the files myself on the site but it fails after a few seconds.

    I've read on this forum about the possible issue with using the multiple upload form instead of the single, so I swapped it back to the single upload and it still failed. Does anyone know what the issue could be?

    For reference, I actually have another upload form on the site which works fine, although the files are generally smaller at around 100mb each.


    Page URL:

    uploads uploaded files multiple upload site
  • Profile Image
    JotForm Support

    Answered by Welvin on March 16, 2014 at 03:59 PM


    1GB should be acceptable when using Multi Upload Field. Can you try that instead of the Javascript Method, embed the form using iFrame Method: Getting the Form iFrame Code. I can see that the validation is not working to both of the form, and this will sometimes the cause of some issues so re-embedding the form using this method should help.

    Test the form after doing the changes and let us know if that makes a difference.


  • Profile Image

    Answered by product_london on March 16, 2014 at 04:17 PM

    I tried adding the form using the iFrame code and I'm still getting the same 'Failed' error at around 4% each time. I've tried it on 2 computers.

    The other issue with the iFrame code is that the form size is not dynamic, to cover the credit card payment section when it's selected.  You can make to size of the form bigger to cover this but there is a large whitespace at the bottom of the page until the client clicks credit card as payment.

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    Answered by Cesar on March 16, 2014 at 05:25 PM

    If possible kindly try the upload through a different network connection. Unfortunately iFrame is not dynamic, so a static height will be neccesary, but it should yield better results avoiding script conflicts on your page. 

    Do let us know if the issue persists with the suggestion above. Thank you.

  • Profile Image

    Answered by rockersdive on March 16, 2014 at 10:43 PM

    Form now working 

  • Profile Image

    Answered by product_london on March 20, 2014 at 07:00 PM

    Ok, so I'm still having a problem. It seemed to be working ok (it let me upload a file to 100%) but the first client to upload a file after I changed it to the iFrame code has had an issue.

    He uploaded the file to 100%, submitted payment and submitted the form. I've received the payment ok and a new upload notification email but it doesn't have a link to download the file. It only has his payment details. 

    I checked on Jotfom to see if the link for the uploaded file was there but it's not. Again just the payment details.

    Is there something I haven't setup on the form correctly?  The form is;


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    JotForm Support

    Answered by BDAVID on March 20, 2014 at 09:38 PM

    Hi, I just tested your form, and uploaded a file. It is showing on your submissions:

    What you can do is to set the upload file as required, you may try again, and let us know if the issue persist.

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    Answered by product_london on March 22, 2014 at 02:10 PM

    Ok, so a really small file works ok.  However, it seems anything of any size (200mb + ) fails. The upload file size is set to 1gb, so it should be fine.  Are there any restrictions uploading files that are 200mb or more? 

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    JotForm Support

    Answered by jonathan on March 22, 2014 at 08:35 PM


     Are there any restrictions uploading files that are 200mb or more? 

    The most common reported restriction with 200MB+ file upload is

    - depending on internet speed,  it is not stable when "Allow Multiple" is enabled. The single file upload is more stable when uploading file that range up to 1GB

    - per Upload session is limited to 1GB. So if you uploading multiple times simultaneously that will exceeed 1GB, it will fail.

    - if Upload is integrated to Dropbox, the Dropbox API have a file limit of 150MB only. Even if the upload field max size is greater than 150MB, the Dropbox integration will limit it.


    Hope this help. 


  • Profile Image

    Answered by product_london on March 23, 2014 at 08:48 AM

    I've changed the file to the single upload option and it work fines now.  I've succesfully uploaded a file that is over 500mb.  I do have a couple of questions about the single upload option;

    1. Is it possible to show the upload progress bar like the multiple upload?

    2. Can I change the image of the single upload button to match other buttons on my site?  I was able to do this with the multiple upload button but can't seen an option for the single upload button.


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    JotForm Support

    Answered by NeilVicente on March 23, 2014 at 11:32 AM


    Upload buttons are a unique type of button in the sense that they cannot be customized via CSS. They can only be modified in terms of look using a custom script, which unfortunately we do not allow on our hosted forms for security reasons.

    I hate to say this but there is no other workaround for your desired output. We are sorry about that.

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    Answered by product_london on March 23, 2014 at 01:00 PM

    Thanks for the reply and explaining a bit further.  I customised the multiple upload one via CSS ok and it matched the submit button.  Is it just the single upload button you can't customise?  What's the difference between the two types of buttons that stops custom CSS being used on both?

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    Answered by Cesar on March 23, 2014 at 01:19 PM

    Single upload uses a standard input buttons it's style is dependant on the OS and browser used, where as the multiple download button can be customzied as you can see by applying different styles on it. 

    Form more information on this kindly review the following thread: http://www.jotform.com/answers/18208.

    Thank you.