A few months ago I forked an open-source URL shortener, slapped a name and a domain on it, and shipped it as Zip1.io. It is now a real, free product: custom slugs, emoji URLs, password-protected links, per-link analytics, and a free REST API.
Why bother? URL shorteners are the most saturated category on the internet. Bitly, TinyURL, Rebrandly and a hundred others already own the SERPs. That’s exactly what makes it interesting. This is mainly an SEO experiment — can a generic utility, with a memorable domain and a focused content strategy, claw out enough long-tail traffic to be worth running?
What it does
Zip1.io is a no-account, no-paywall URL shortener. The features that exist in most paid tools — and that I wanted to be free — are:
- Custom slugs (so
zip1.io/launchinstead ofzip1.io/aB3xQ7) - Emoji URLs (
zip1.io/🔥works) - Password-protected links
- Per-link click analytics with country, browser and referrer breakdowns
- A free REST API — one POST, no key, no signup
- An MCP server so Claude and other agents can shorten URLs natively
The open-source bit
The core URL-shortening logic came from an MIT-licensed Flask project I found on GitHub. I rebranded it, rewrote the frontend, added the MCP server, the analytics views, the API docs page, and a stack of use-case landing pages. The MongoDB schema and the redirect handler are largely the original code, which was already solid.
I am a big fan of this pattern. There is a vast amount of well-built open-source software sitting unused because nobody bothered to give it a brand, a domain, and a landing page. Picking one up and finishing the marketing job is a legitimate way to ship.
The SEO experiment
URL shorteners get searched for a lot. They get searched for in very specific ways: “password protect a Google Drive link”, “free Bitly alternative”, “shorten URL with emoji”. Each of those queries has a small audience but they add up.
So the strategy is identical to my programmatic SEO play on Leaderboarded: instead of fighting Bitly head-on for “url shortener”, build a wide net of focused pages that each answer one specific question well. A few examples already live:
- Password-protect a Google Drive link
- Bitly password-protect alternative
- Shorten Amazon affiliate links
- One-time-use links
What’s next
Honestly, mostly more landing pages and waiting for Google. The product surface is feature-complete for what a free shortener needs to do. The interesting work now is content and backlinks.
If you write about developer tools, link shorteners, or marketing automation and any of the above is useful — please consider linking to it. That is, after all, the point of writing this post.
Try it at zip1.io. One field, one click, no signup.
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