How to Change the Allowed File Types in File Upload Fields

May 21, 2025

The File Upload element lets you collect all sorts of files, like documents, images, and other media, directly through your forms. It’s perfect for job applications with resumes, event registrations needing signed waivers, or customer support forms asking for screenshots or error logs.


By default, the File Upload field accepts a wide range of file types, including PDF, DOC, DOCX, XLS, XLSX, CSV, TXT, RTF, HTML, ZIP, MP3, WMA, MPG, FLV, AVI, JPG, JPEG, PNG, and GIF. And while these are great for many forms, setting specific allowed file types helps you control what users can upload. For example, if you only want PDFs, you can block other formats like Word or image files to keep submissions consistent and easier to manage.

Once you’ve added a File Upload field to your form, you can easily choose which file types to accept. Here’s how to do it:

  1. In Form Builder, click on your File Upload field and then click on the Gear icon on the right side of it.
  2. Then, in the File Upload Properties window on the right side of the page, under the Options tab and enter the file types you want to accept in the File Types box, separating each file type with a comma.
File Types property under the Options tab of the File Upload Properties in Jotform Form Builder

That’s it! You’ve successfully set the allowed file types for your file uploads. You can check out our guide on How to Change the Size Limit in File Upload if you also want to change that.

Notes

  • Any changes made to the allowed file types are automatically saved.
  • The file extension names aren’t case-sensitive (e.g., ‘PDF’ and ‘pdf’ are considered the same).
  • Enter the file extensions without the leading dot (e.g., use ‘pdf’ instead of ‘.pdf’).
  • Enter an asterisk (*) in the File Types box to allow all file types.
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