Export & Import

Share projects with others or back them up using the .hllmproject portable archive format.

Exporting a Project

1. Open the project you want to export
2. Click the more menu (three dots) in the top-right
3. Select Export project
4. Choose a save location — the file is saved as ProjectName.hllmproject

What Gets Exported

Data	Included
Files	Yes — full copies
File notes	Yes
File favorites	Yes
Filament assignments	Yes — including curated library data
Tags	Yes — names and colors
Collections	Yes — names and descriptions
Print dimensions (W/D/H)	Yes
Estimated print time	Yes
Project thumbnail	Yes
Project description	Yes — supports Markdown

Markdown in Descriptions

Project descriptions support Markdown, so you can write rich documentation directly inside a project. This is useful for:

• Explaining complex multi-color prints with detailed instructions
• Adding links to your website, social media, or source files
• Providing attribution and credits
• Documenting print settings or assembly steps

When you export a project, the full Markdown description travels with it — so anyone who imports it gets the complete context.

Importing a Project

1. Click the more menu (three dots) in the top-right of the main view
2. Select Import project
3. Choose a .hllmproject file

The imported project is created as a new, independent project with:

• A new unique ID — it won't conflict with existing projects
• All files extracted and stored in your library
• 3MF thumbnails automatically regenerated
• Tags matched by name — if a tag with the same name already exists, the project is linked to it; otherwise a new tag is created
• Collections handled the same way — matched by name or created if new
• Filament data preserved with match status and curated library references

If you currently have tags or collections selected in the sidebar when you import, the imported project will also be assigned to those tags and collections.

The .hllmproject Format

The .hllmproject file is a standard ZIP archive containing:

ProjectName.hllmproject
├── manifest.json        # Project metadata, tags, collections, filaments
├── thumbnail.png        # Project cover image
├── files/
│   ├── model.3mf        # Project files
│   └── design.hfp
└── thumbnails/
    └── file_xxx.png     # Per-file thumbnails

The manifest.json uses version 1 of the format and includes all project metadata, making it fully self-contained and portable across different libraries.

tip

.hllmproject files are just .zip files. You can rename one to .zip and unzip it to inspect or manually edit the contents.