Dapple accepts the major file formats across images, video, audio, documents, and text on every submission form. You configure which types each File Upload field accepts (and the maximum size) when you build the form. This article is the full reference of supported formats. If you need a format that's not listed, contact support — we can usually add it.
Supported file types
Type | Extension(s) | Description |
Image | .png | Raster image with lossless compression |
Image | .jpg, .jpeg | Raster image with lossy compression |
Image | .gif | Animated or static raster image |
Image | .webp | Modern image format for web use |
Image | .svg | Scalable vector graphics |
Video | .mp4 | Common video format with high compatibility |
Video | .mov | Apple QuickTime video format |
Video | .webm | Video format optimised for web use |
Video | .avi | Older video format, high quality |
Audio | .mp3 | Compressed audio format |
Audio | .ogg | Open-source audio format |
Audio | .wav | High-quality uncompressed audio |
Audio | .aac | Advanced compressed audio |
Document | Portable Document Format, read-only | |
Document | .doc | Microsoft Word document (older format) |
Document | .docx | Microsoft Word document (modern format) |
Document | .xls | Microsoft Excel spreadsheet (older format) |
Document | .xlsx | Microsoft Excel spreadsheet (modern format) |
Document | .ppt | Microsoft PowerPoint presentation (older format) |
Document | .pptx | Microsoft PowerPoint presentation (modern format) |
Text | .txt | Plain text file |
Text | .csv | Comma-separated values file |
How do I restrict which file types my form accepts?
Configure accepted file types per File Upload field in Form Builder:
Open the project → Form Builder.
Click any File Upload field.
In the field settings, configure accepted file types — pick a category (Image only, Document only) or specific extensions.
Set the maximum file size for the field.
Save.
Different fields can have different rules — your form might accept Images only for one upload and PDFs only for another.
What's the maximum file size?
Default file uploads accept up to 1 GB per file. For very large uploads (4K video, high-resolution image sets), set the per-field limit deliberately and tell creators in the field description what size to expect. Larger files take longer to upload, especially on mobile.
What if I need a file type that isn't listed?
Contact support. We can usually add common formats on request, especially for industries like architecture, music production, or 3D design where standard formats sit outside this list.
Best practice for file uploads
Restrict accepted types deliberately — accepting 'everything' invites garbage. If you only want JPEGs, set the field to accept JPEGs only.
Add a clear description on each File Upload field telling creators what to upload — 'PDF, max 10 MB' is far better than no instruction.
Test upload limits with a representative file before opening the project — a creator finding the limit at submission time is a bad first impression.
Compress large files where possible — most images don't need to be 50 MB.
Where to go next