Protected destinations
Nova Shield checks destination changes, explains risk signals, and warns or blocks when necessary.
Secure link infrastructure for every team
Protected Links.
Measurable Results.
Create protected short links, branded QR codes, and measurable campaigns with built-in destination monitoring.
No account required
Up to 5 guest links per day
Protected by Nova Shield
Illustrative demo data
Destination URL
https://your-long-domain.com/campaign/summer↗
Your short link
4ul.ink/summer
12,842Clicks
614Verified conversions
$18,420Attributed revenue
97/100Shield score
Destinations continuously monitored
Redirects survive analytics limits
Privacy-conscious measurement
Export and custom-domain portability
URL Shortener
Turn Long URLs into Smart Links
Create a clean, memorable short link in seconds. Use guest mode for a quick one-time link, or create a workspace to save, edit, and track your links.
Shorten a Link Explore URL Shortener →Nova Shield
Every link checked. Every risk explained.
Nova Shield checks destinations when links are created, edited, and opened. Suspicious links warn visitors, dangerous destinations are blocked, and outdated results are refreshed automatically.
Continuous destination monitoring
DNS and private-network protection
HTTPS, domain age, and redirect analysis
Visitor warnings and dangerous-link blocking
Check a Link with Nova Shield
Why 4ul.ink
Four capabilities. One dependable link platform.
Everything important is organized around protection, measurable outcomes, reliable delivery, and control.
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.
Measure
From click to verified business result
See which campaign, QR code, device, and destination produced the click—and whether it converted.
Total clicksCountriesDevicesReferrersTimelineCampaignsA/B variantsConversions
Explore Analytics
Learn about link analytics →
Included with every link
QR Codes Included
Every short link can have its own customizable QR code. Download it for print materials, business cards, packaging, menus, presentations, or social media.
Explore QR Codes →Bio Pages
One Page. Every Link.
Create a polished profile that brings together your website, social profiles, videos, products, and contact links.
Perfect for creators, businesses, freelancers, and growing teams.
Create a Bio PageDeveloper API
Built for Developers
Create and manage short links programmatically using an authenticated REST API and signed webhooks.
Perfect for:WebsitesMobile appsSaaS platformsMarketing automationInternal toolsAI agents
View API Documentation
Frequently asked questions
Frequently Asked Questions
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 account required. Create up to 5 guest links per day. Guest links expire after 30 days and cannot be edited or managed later.
What happens to guest links?
This guest link expires automatically in 30 days. Create an account and keep this link
Can I create custom links?
Yes. Registered users can choose a memorable custom alias whenever it is available and not reserved by the platform.
Can I create QR codes?
Yes. Every short link, including a guest link, includes a downloadable QR code. Custom QR styling is available on eligible paid plans.
Can I track guest links?
Guest links are designed for quick, temporary sharing. Create a free workspace to save links and access their analytics.
Is there an API?
Yes. REST API access and signed webhooks are available on supported paid plans.
Start now
Ready to Make Every Link Smarter?
Create a guest link now, or open a free workspace to save and manage everything.