Verdict
Classic weekend build. The product is simple; Bitly's moat is brand trust and enterprise packaging.
What you can rebuild
Shorten a long URL to your domain/slug, redirect with 302, store click counts and basic referrer/user-agent stats. Custom aliases for logged-in users.
What stays hard
Branded domains at enterprise scale, QR campaigns, trust/safety against phishing, and SLA-grade redirect latency worldwide.
Starter prompt
Build a Bitly-like shortener called Shortspan. Anonymous users can create a short link with a random slug. Logged-in users can set a custom slug, see click counts, and delete links. Redirect endpoint must be fast. Stack: Next.js, Tailwind, Supabase (or Redis for redirects if easy). Clean stats page per link.
Follow-up prompt
Add: UTM builder helper, QR code download, link expiration date, and a simple CSV export of clicks by day.
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Reference product: bitly.com. We are not affiliated. Prompts build inspired MVPs, not trademarked clones for commercial misuse.