Last reviewed Jan 16, 2026

End-to-end encryption (E2EE)

NimbleCal encrypts your calendar content on your device so it cannot be read without your keys.

See: Encryption overview

Local-first storage

Your calendar data lives on your device first (in browser storage). This keeps the app fast and resilient.

  • Offline viewing works for everyone.
  • Offline edits are a Plus feature.

See: Offline mode

Event invites are protected so only the intended recipient (and/or someone with the invite link) can view the invite and RSVP.

Important: Do not forward invite links unless you intend to share the event details.

Report a security issue

If you discover a security vulnerability, please report it responsibly:

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