Reference
Attachment formats
Supported image formats and per-item / per-file limits.
Quick reference for what you can attach to spec items.
Limits
| Limit | |
|---|---|
| Per spec item | 10 files |
| Per file | 10 MB |
Formats
| Format | Extensions | Best for |
|---|---|---|
| PNG | .png | Screenshots, line drawings, logos with transparency |
| JPEG | .jpg, .jpeg | Photographs (smaller files than PNG) |
| WebP | .webp | Modern browsers, best size/quality balance |
| GIF | .gif | Simple graphics; animations are kept but only the first frame is used in exports |
| AVIF | .avif | Newest format, smallest files, growing support |
What's not supported
- HEIC (Apple's iPhone default), convert to JPEG or PNG before uploading.
- TIFF, convert to JPEG or PNG.
- BMP, convert to PNG.
- PDF, not an image; not supported as an attachment.
- Video, not supported.
In exports
Every supported format is embedded into the Excel export. Very large attachment counts inflate the workbook file size, for projects with hundreds of attachments, expect workbook files in the tens of megabytes.
Recommended pre-upload
- Phone photos: shoot at a moderate resolution (8MP is plenty); convert HEIC → JPEG if needed.
- Supplier screenshots: PNG.
- Customer reference images: whatever they sent, as long as it's a supported format.
Storage
Attachments live in Google Cloud Storage under a path scoped to your workspace and project. Files are server-side cloned when items, sheets, units, or projects are duplicated. Deleted attachments are queued for cleanup; the file is no longer accessible immediately.