From another tool

There are two shapes of move. A one-shot import reads an export once and stops. A live sync connects to the other system and keeps mirroring it on a schedule. Which one you get depends on whether that system has a connector.

Homebox

Homebox has both, side by side on the Integrations page under Migrate in from another app:

• Homebox, live. Paste your Homebox URL and an API key, and Cobblr creates a sync connection that mirrors items and locations, photos included. Import once and stop, or keep it synced so later changes in Homebox flow across. The connection is saved either way, so you can re-run it or turn syncing on later.
• Homebox, CSV. The one-shot path without the API. In Homebox, go to Tools → Import/Export → Export and download the CSV, then upload it here. Items land in Inventory, locations in Locations, and labels come across. Photos do not travel in a CSV; use the live connector if you want them.

Both preview before writing. A LAN-only Homebox that your Cobblr can't reach directly is dialed through your workspace's edge bridge.

Sync sources vs a one-shot import

A sync source is a connector: it holds the source's address and credential, mirrors chosen entity types, and can keep them current. Sources are installable manifests rather than code baked into Cobblr, so the set grows without a new release. The Integration catalog lists what ships (Homebox for inventory, Spoolman on the filament side), and Syncing from other systems covers how connections work.

A one-shot import is a file you upload once. Nothing stays connected; the records are yours from then on.

Everything else: export to CSV

Sortly, a homegrown app, a spreadsheet you kept for years: if there is no connector for it, export what you have to CSV and use From a spreadsheet or CSV. It covers inventory items and the location tree. If a tool you use deserves its own connector, that is worth saying in feedback, and anyone can write a source manifest for a system with an API (see Sync-source manifests).