“This form cannot be embedded”: file upload questions
Updated 2026-10-17. Sources are linked inline; we cite Google's own help pages where possible.
If your Google Form contains a File upload question, the Send → Embed tab shows “This form cannot be embedded because it makes use of File Upload questions” instead of an embed code (reported here). The reason: uploading requires a Google sign-in (Google), and Google's sign-in page won't load inside another website's frame.
What doesn't work
- Pasting the form URL into an iframe anyway: the form may load, but the upload step fails, often with “docs.google.com refused to connect”.
- Changing sharing settings: there is no setting that removes the sign-in requirement for uploads.
What works
- Link instead of embed. Put a button on your site that opens the form in a new tab. Uploaders still need to sign in.
- Split the form. Embed the Google Form without the File upload question, and put a separate no-login upload link or widget next to it. Ask for the same email in both so you can match them.
- Use an upload tool built to embed. Several third-party uploaders offer embed codes on paid plans.
Where CatchFolder fits
CatchFolder's upload page is a normal web page that anyone can open without signing in, so you can link to it from your site or form, and files land in your own Drive. You can also embed it with an iframe (snippet in the setup guide): the app allows framing, unlike a Google Form with a File upload question.
FAQ
Why can't I embed a Google Form with a file upload question?
Because uploading requires a Google sign-in, and Google's sign-in page can't run inside another website's frame. Google withholds the embed code for such forms.
How do I fix 'docs.google.com refused to connect' in an embedded form?
It usually means the form has a File upload question or requires sign-in. Link to the form instead, or remove the upload question and collect files with a separate no-login upload link.
Can I embed just the upload part?
Not with Google Forms. Use a separate upload tool that supports embedding or linking.
Related guides
- Google Form file upload without sign-in: what works
- How to collect files in Google Forms from people without a Google account
- Google Drive file request link: let others upload to your Drive
- How to collect files from anyone without a Google account (2026 comparison)
- Google Forms "Server rejected" upload error: causes and fixes
- How to let someone upload to your Google Drive (without edit access)
- Google Forms file upload for non-Gmail users
- File upload greyed out in Google Forms: causes and fixes