Box Doc Gen has several limitations across APIs, security, performance, language support, and template features that you should consider when implementing document generation.
API limitations
| Item | Limit |
|---|---|
| Maximum template size | 100 MB |
| Maximum JSON data size | 100 KB |
| Number of tags | No fixed limit |
Box security limitations
Box Doc Gen must be able to access templates to generate documents. If a template is restricted by a Box Shield classification policy, document generation will fail.
Ensure your Shield classification policy allows Doc Gen access to required templates.
Performance limitations
Performance varies based on template size and document complexity.
For templates smaller than 1 MB:
- Up to 50 documents per minute per enterprise (P95) are typically generated in under 15 seconds
- The system remains stable at up to 80 documents per minute, but generation time may exceed 15 seconds at higher volumes
Language limitations
Box Doc Gen supports English-only template tags. Other content can use any language.
| Component | Language support |
|---|---|
| Template tags | English only |
| JSON data and document content | Any language |
| Computations, conditions, and calculations | English strings or numeric values only |
It is recommended to test templates to confirm language compatibility for your use case.
Template limitations
Box Doc Gen uses Microsoft Word as the template authoring environment. Some Word features are not supported.
| Microsoft Word feature | Supported |
|---|---|
| Headers and footers | Yes |
| Tags with comments | No |
| Developer controls (text box, check box, combo box, options, frame, protected forms) | No |
| Link tags | No |
| Bookmarks | No |
| Different headers/footers per page | No |
| Emojis | No |
| Custom fonts | No |
| Text layout | No |
| Text directionality | No (Left-to-right only) |
| Text boundaries | No |
| Text alignment and pagination | No |
| Text justification | No |
| Line and word breaking | No |
| Ruby characters and text annotation | No |
| Objects, shapes, 3D models, icons, graphs | No |
| Media, video or audio | No |