Build your URL Shortener API with AI in under 5 minutes

Build a Bitly-style URL shortener with a JSON POST /shorten endpoint, custom aliases, optional expiry dates, click counters, and a redirect handler — generated from a single prompt.

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What is a url shortener api?

A URL shortener turns long URLs into short, trackable, brand-aware ones. Marketers use them to fit links into character-limited platforms and to attribute clicks to specific campaigns. Sales teams use them to track which prospect actually opened the deck. Developers use them inside transactional emails when the full URL is hostile to the eye. Bitly invented the category and still leads it; T.LY, Rebrandly, and Short.io fill the long tail. Building your own lets you put a brand-aware domain on the front (mybrand.link/promo) instead of bit.ly/3xyz, and keeps the click data inside your stack so it can join to your CRM or analytics. The hard parts aren't redirects — those are HTTP 302s — they're abuse prevention (your shortener can't become a phisher's distribution channel) and the analytics depth users actually want.

Common features

  • Custom alias or auto-generated short code
  • 302 redirect with optional 301 mode for permanent links
  • Per-click logging — timestamp, referer, user-agent, IP-hashed location
  • Per-link click count and time-series chart
  • Expiry date so promotional links auto-disable
  • Password protection per link (optional)
  • QR code generated per link
  • Bulk shorten via CSV upload or API call
  • Abuse detection — phishing-domain blacklists, click-rate anomaly flags
  • Custom domain support for brand-aware short URLs

Real-world examples

Marketing campaign tracker

Per-campaign short links with UTM-tagged destinations. Click dashboard segmented by campaign so reporting is one query.

Sales link tracker

Short link generated per prospect-facing deck. Click event posts to the CRM so the rep knows the deck was opened.

Personal short domain

yourname.link as the shortener domain. Used in social bios, podcast notes, conference talks. Clicks roll up to a personal analytics dashboard.

Why FloopFloop fits url shortener api projects

Bitly's free tier caps you at 10 links a month and removes click history after a couple of weeks; the paid tiers are priced for marketing teams, not individuals. The component is logically simple — a domain, a redirect handler, a click logger — so the hosted economics are hard to justify once you have any volume. FloopFloop ships you a shortener that lives on your brand's domain, logs clicks into your own database (no third party between you and your analytics), and lets you add the niche features off-the-shelf services don't (per-link Slack notifications, deep-link routing on mobile, campaign-specific UTMs at click time).

Probieren Sie diese Prompts aus

Kopieren Sie einen der folgenden Prompts und fügen Sie ihn in FloopFloop ein, um zu starten.

Build a URL shortener REST API. POST /api/shorten accepts {url, alias?, expires_at?, tags?} and returns the short_url. The catch-all /[alias] route 302s to the destination, bumps a click counter, and 404s on missing or expired entries. Auto-generated aliases are 6 lowercase alphanumeric chars (cryptographically random — no Math.random). All non-http(s) protocols rejected at write + read time.

Create a branded link shortener for a marketing team. Custom alias format /[campaign]-[id], a JSON GET /api/links endpoint that lists every link with click counts grouped by campaign tag, and a 100-requests-per-IP-per-hour rate limit on the shorten endpoint to block bulk-spammer scripts.

Design an internal link shortener for a small company. POST /api/shorten requires an X-API-Key header that matches an env var; the catch-all redirect route is open so anyone with the short URL can use it. Storage is in-memory (per Lambda container) — fine for the company's modest traffic and resets on every deploy.

Build a temporary-link service. Every shortened URL gets a mandatory expires_at — max 7 days from creation. The /[alias] route returns 410 Gone with a friendly 'link expired' JSON for expired entries instead of redirecting. A daily cron sweeps rows with expires_at < now() to keep the table bounded.

Häufig gestellte Fragen

Where do shortened links live?
The default template uses an in-memory Map for storage so the API is 200-able out of the box without a DB schema migration. Replace with the project's Postgres (`import sql from '@/lib/db'`) when graduating to a multi-replica deploy — the docblock at the top of /api/shorten/route.ts walks through the swap.
How does the catch-all redirect route avoid colliding with /api/*?
Next.js's resolver matches static segments first, so /api/health, /api/shorten, /favicon.ico, and /_next/* all win over /[alias] without any extra config. The redirect handler also rejects alias values that don't match the {3..30}-char regex, so /favicon.png lookups 404 cleanly instead of hitting the DB.
What stops someone from creating a `javascript:alert(1)` redirect?
Every destination URL is run through a safeUrl() check at write time AND again at read time on the redirect handler. The function rejects every non-http(s) scheme — javascript:, data:, file:, view-source:, etc. — so the shortener can't be used as a XSS-as-a-service for phishing pages.
Is there a rate limit on the shorten endpoint?
Yes — 100 shorten requests per IP per hour, salt-hashed against FLOOP_PROJECT_ID. Check fires BEFORE body parse so a hostile client can't waste validation time after they've hit the cap. The redirect handler itself is open (it's just a redirect, not a write).
Can I use custom aliases like /sale-2026?
Yes. POST /api/shorten accepts an optional `alias` field; the validator rejects reserved slugs (api, health, admin, login, signup) and anything outside the {3..30}-char allowlist regex. If the alias is taken the API returns 409 Conflict.
Can I add link expiration?
Yes — the API accepts an optional `expires_at` ISO timestamp. The redirect route returns 410 Gone past that timestamp instead of 302'ing. There's no built-in DB sweep of expired rows; if your project keeps the in-memory store, expiry happens organically on cold starts.
What about analytics on clicks?
The default template bumps a per-link `clicks` counter on every redirect (fire-and-forget so it never delays the 302). For richer analytics — per-day timeseries, geo, referrer breakdown — refine into the chat asking for a `click_events` table and a /api/links/[id]/stats endpoint.

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