Prevent Accidental Link Previews When Sharing Secrets
Prevent Accidental Link Previews When Sharing Secrets (Stop Unfurls)
Why previews can “burn” a secret link
Many apps auto-fetch URLs to generate a preview (title, image). That fetch can consume a one-time link or leak metadata (who/when/where) before your recipient opens it.
Safer habits for secret links
- Use short expiries (24–72h) and access codes sent via a different channel. Basics: The Safe Way to Share Passwords in 2025 (No Email).
- Verify by phone before sharing high-impact secrets. Anti-phishing checklist: Verify Links Like a Pro.
- Consider zero-knowledge tools where providers cannot read the content. Primer: Zero-Knowledge Sharing.
App tips (general)
- Disable link previews in chat settings when available.
- Send the access code first, then the link in a new message to reduce accidental fetches.
- Don’t paste multiple links in the same message—previews may queue-fetch all of them.
What to do if a preview likely opened your link
- Assume it’s consumed and generate a new one-time link.
- Shorten the expiry and rotate the secret if it was high impact. See response plan: The Simple Incident Playbook for Leaked Passwords.
External references & tools
Related reading
Send secrets safely: The Safe Way to Share Passwords in 2025 (No Email)
Reduce long-lived exposure: One-Time Links vs. Encrypted Email
Respond after a slip-up: The Simple Incident Playbook for Leaked Passwords
Bottom line
Previews are convenient—until they leak or consume a secret link. Disable unfurls where possible, split link and code, and keep expiries short.
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