An open, community-maintained database of 3D-printing filaments — brands, materials, filament product lines, colour variants, spool sizes, and the stores that sell them. Hosted by the Open Filament Collective, currently facilitated by SimplyPrint.
The data is free to use under MIT — slicers, print farm software, NFC spool tags (OpenPrintTag), inventory apps, and price-comparison tools can all read it directly.
The fastest way to add, fix, or correct data is the cloud editor — no install required:
Browse brands → materials → filaments → variants → sizes, edit fields, upload logos, and submit your changes as a pull request straight from the browser. The editor validates schema, logos, and store references in-page before submitting, so most mistakes are caught up front.
You can sign in two ways:
- GitHub — your edits become a pull request opened from your own fork, attributed to you on your GitHub profile.
- SimplyPrint — your edits become a pull request opened by our bot account, with attribution back to you in the PR body. No GitHub account needed. Rate-limited per IP (default 5 submissions/hour).
If you'd rather work from a clone — for offline edits, running the Python validator against your own data, bulk imports, or developing the WebUI itself — see docs/contributing-locally.md. For editing JSON files by hand without the WebUI, see the manual editing guide.
The full dataset is published as a static REST API, with bulk JSON / NDJSON / SQLite / CSV downloads alongside it. The landing page documents the URL shape, endpoints, and examples:
Address entities by path, e.g. /api/v1/brands/{brand}/materials/{MATERIAL}/filaments/{filament}/variants/{variant}.json.
ℹ️ UUID-based lookups are still supported for integrations that need stable opaque identifiers (NFC tags, slicer profiles), but path-based addressing is what we recommend for everyone else — it's human-readable and stable across cosmetic renames.
- WebUI guide — features, modes, configuration
- Manual editing guide — editing JSON files by hand
- Validation guide — running the validator, understanding errors
- Local contributing guide — full fork → clone → PR walkthrough
- Pull request guide — opening a PR from your fork
- Software installation — Git, Python, Node.js setup (local route only)
MIT. See LICENSE. The data is free to use, redistribute, and embed in commercial products; attribution is appreciated but not required.
- OpenPrintTag spec — NFC data format that consumes OFD UUIDs
slicer-profiles-db— separate repo mapping OFD filaments to slicer profiles- SimplyPrint — 3D printer management platform; facilitator of the Open Filament Collective