Operating system Windows Joplin version 3.4.12 Desktop version info Joplin 3.4.12 (prod, win32) Device: win32, 12th Gen Intel(R) Core(TM) i9-12900K Client ID: 75************* Sync Version: 3 Profile Version: 48 Keychain Supported: Yes Alternative instance ID: - Revision: e9a9f68 Backup: 1.…

FWIW This seems to be specific to Windows because I just attempted to reproduce on MacOS by entering url in the browser and was sent correctly to the existing instance.

Yes, back then, updating Joplin temporarily resolved the issue, but now I’m on the latest version and issue has re-emerged.

URI callback opens second instance of Joplin

Support

_vg 24 October 2025 19:11 3

Closely related to your former topic: Using the note's ID, how to open note from an already running instance of Joplin?

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Using the note's ID, how to open note from an already running instance of Joplin? Support	6	141	6 October 2025
Multiple instances Support	22	690	14 May 2025
External Links to JoplinPortable no longer work Support	2	93	8 June 2025
Add opening in new window to external Url (x-callback-url) Features	0	60	16 November 2025
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URI callback opens second instance of Joplin

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