Introduction | Manyfold | WarmIndex

Manyfold is a self-hosted, open-source web application for organizing, browsing in interactive 3D, tidying, and sharing 3D print files like STLs and OBJs, designed for 3D printing hobbyists and self-hosters.

🚀 Overview

Manyfold is like Plex for your 3D printing models: it scans your file library, generates 3D previews, lets you tag and categorize everything, and makes it easy to find and share models.

It solves the chaos of thousands of scattered STL files with generic names across drives—no more digging through folders or duplicates. Built for 3D printer owners, hobbyists, and makers who self-host to keep their data private and organized.

The developer started it to manage their own massive collection of print files across computers, evolving it into a Fediverse-enabled sharing platform with community support and NLnet funding.

✨ Key Features

Interactive 3D Browsing: View models in full 3D right in the browser with THREE.js—no downloads needed to preview.
Smart Organization: Tag, add metadata (notes, source, supported printers), sort by creator/collection, auto-tidy files with custom renaming rules.
Sharing & Federation: Share publicly/privately, follow instances, integrate with Fediverse (ActivityPub).
Troubleshooting Tools: Detect duplicates, nested archives, inefficient formats; more analysis coming.
Upcoming: Enhanced API, better integrations.

🛠 Tech Stack

Frontend: Bootstrap 5, THREE.js (TypeScript), JavaScript, SCSS
Backend: Ruby on Rails (Ruby 3.4), Sidekiq (jobs)
Database: PostgreSQL (production), SQLite3 (development)
Auth: Built-in Rails authentication
Hosting: Docker (multi-platform), self-hosted

👥 Who Is This For?

This project is useful for:

3D printing enthusiasts managing large libraries of models
Self-hosters seeking a private Plex/Jellyfin alternative for STLs
Makers and communities sharing designs via Fediverse

📸 Screenshots / Demo

Live demo: https://try.manyfold.app
GitHub: https://github.com/manyfold3d/manyfold

🔥 Project Status

🟢 Actively building

Last updated: 2026-03-24

❓ FAQ

Is this project free?

Yes / Open Source (Fully free to self-host, no subscriptions; funded by donations via Open Collective.)

Is the source code available?

Yes — https://github.com/manyfold3d/manyfold

Can I contribute?

Yes — Browse "good first issue" label, submit PRs (follow Rubocop/TS linting), test with RSpec, join Matrix room for discussion, or translate via i18n.