301 vs 302 Redirects: What Your URL Shortener Uses and Why It Matters
· Explainers · 6 min read
A plain-English guide to 301 and 302 redirects — the difference, which one a URL shortener should use, and how redirect type affects SEO, analytics, and link flexibility.
Every short link is a redirect: someone requests the short URL, and the server sends them onward to the real destination. But not all redirects are the same. The HTTP status code behind that hop — usually a 301 or a 302 — changes how browsers, search engines, and analytics tools treat your link.
What a Redirect Actually Is
When a browser requests a short link, the server responds with a redirect status code and a "Location" header pointing to the destination. The browser then automatically requests that destination. This whole exchange happens in milliseconds, which is why a well-built shortener can redirect in under 50ms — the visitor barely notices the hop.
301: Moved Permanently
A 301 tells the browser and search engines that the resource has permanently moved to the destination. Browsers aggressively cache 301s, so after the first visit they may skip the shortener entirely and go straight to the target. Search engines pass most ranking signals (link equity) through a 301 to the destination.
302: Found (Temporary Redirect)
A 302 says the redirect is temporary — the short URL is the canonical address, and the destination might change later. Browsers don't cache a 302 the same way, so each click goes through the shortener. That round-trip is exactly what lets a shortener count the click and record analytics.
Why the Difference Matters for Short Links
- Analytics: A cached 301 can cause the shortener to miss repeat clicks, undercounting your traffic. A 302 ensures every click is measured.
- Editable destinations: If browsers have cached a 301, changing the destination later may not reach people who already visited. A 302 keeps the shortener in control of every hop.
- SEO: For a link you want search engines to follow to a permanent home, 301 passes the most signal. For trackable marketing links, the tracking is usually worth more than the SEO nuance.
Which Should You Want?
For marketing and campaign links — where you care about click analytics and the ability to repoint a link later — a temporary redirect is the right default, because it keeps every click flowing through the shortener where it can be counted and rerouted. For a permanent vanity URL that will never change and where you want to consolidate SEO value, a permanent redirect makes sense. The key is using a shortener that handles this correctly rather than leaving your clicks uncounted.
The Bottom Line
You rarely need to think about status codes by hand — a good URL shortener picks a sensible default so your links stay both fast and measurable. What matters is knowing that redirect type is why some shorteners can track every click and let you edit destinations after sharing, while cruder tools lose data to browser caching.