Big File Form Uploads brings large, chunked uploads to Gravity Forms File Upload fields. Once the add-on is active, your File Upload fields inherit the maximum upload size from Big File Uploads and send files to your server in small pieces — so your visitors can submit large files without hitting host limits or timeouts.
This guide shows you how to add a large-file upload field to a Gravity Forms form.
Before You Start
Make sure the following are active:
- Big File Uploads (free parent plugin), with your maximum upload size set under Settings → Big File Uploads → Uploading Files.
- Big File Form Uploads (the add-on).
- Gravity Forms.
Step 1: Add a File Upload Field
- Go to Forms and open (or create) the form you want to edit.
- From the field panel, add a File Upload field under Advanced Fields.
- Drop it into your form layout.
Step 2: Save the Form
This step matters. When you save the form, Big File Form Uploads prepares your File Upload fields for chunked uploading — it enables multi-file mode so the chunked uploader can take over.
- Click Update (or Save Form) after adding or editing a File Upload field.
- If you ever change your maximum upload size in Big File Uploads, no form changes are required — the new limit is applied to the uploader automatically.
Step 3: Test the Upload
- Preview the form or visit the page where it's embedded.
- Choose a large file in the File Upload field.
- Submit the form.
The file is uploaded in small chunks before submission. The form won't complete until the upload finishes, so you never receive a partial entry.
Good to Know
- Field upload limits. Big File Form Uploads sets the uploader's maximum size from your Big File Uploads setting. If you've set a smaller "Maximum File Size" on the field itself in Gravity Forms, that lower value still applies — raise it if you want visitors to use the full limit.
- Multi-file fields. When the add-on prepares a single File Upload field for chunking, it switches the field to multi-file mode. If you need visitors to attach more than one file, increase the Maximum Number of Files on the field.
- The limit is global. The maximum size comes from Big File Uploads and applies across all your Gravity Forms File Upload fields.
Still Need Help?
If your Gravity Forms form still won't accept large files, see Troubleshooting: My form still won't accept large files, or contact our support team.