Protected destinations
Nova Shield checks destination changes, explains risk signals, and warns or blocks when necessary.
4ul.ink for developers
Reliable link infrastructure without rebuilding it yourself
Create protected links with scoped API tokens, safe retries, signed webhooks, conversion endpoints, and workspace-level usage controls.
Protected by Nova ShieldMobile friendlyFree to start
Product demonstration
01 · Authenticate with least privilege✓
02 · Create links safely✓
03 · Automate with confidence✓
Secure by defaultWorkspace controlledReady to measure
✓Protected destinations
∞Reliable redirects
◌Privacy-conscious measurement
↗Export and portability
How it works
From destination to measurable result
A clear workflow with security and control built into every step.
- 01
Authenticate with least privilege
Issue revocable tokens with only the scopes required by each integration.
- 02
Create links safely
Use documented schemas and idempotency keys so retries never create accidental duplicates.
- 03
Automate with confidence
Verify signed webhook events and inspect stable delivery identifiers.
Built for real use
Control, measurement, and continuity
Measurable outcomes
Connect clicks to campaigns, verified conversions, and revenue—not just vanity charts.
Reliable redirects
Your links keep redirecting when detailed analytics limits are reached or a paid plan is downgraded.
Brand and control
Use branded domains, custom QR codes, access rules, campaigns, and workspaces without losing ownership.
Frequently asked questions
Useful answers before you start
Can I use 4ul.ink for free?
Yes. You can create guest links without an account or create a free workspace with dashboard access and core link-management features. Paid plans add higher limits and advanced tools.
Do I need an account?
No. You can create a guest link without registering. Create a free account to save your links, access analytics, and manage link settings from your dashboard.
Can I track guest links?
Guest links are designed for quick, temporary sharing. Create a free workspace to save links and access their analytics.
Start now
Create your first protected link
Start free, keep control, and add advanced capabilities when you need them.