# What Is a URL Redirect?

> A URL redirect automatically sends a visitor from one web address to another. Here is how redirects work, the difference between permanent and temporary ones, and why websites rely on them.

*Section: Technology — By Liam Chen (World Affairs Reporter) — Published August 17, 2023 — 5 min read*

Canonical URL: https://dailyjunction.org/technology/what-is-a-url-redirect
Tags: url redirect, http status codes, web, links, seo

## Key takeaways

- A URL redirect automatically forwards a visitor from one web address to a different one.
- A 301 redirect is permanent and is used when a page has moved for good; a 302 redirect is temporary.
- Redirects keep old links working, stopping visitors from hitting a 404 error when a page has moved.
- Used well they preserve a site's search ranking, but long chains of redirects can slow pages down.

You click a link, and the address in your browser changes to something different before the page even appears. You typed one web address and somehow arrived at another. That sleight of hand is a URL redirect, and it quietly keeps much of the web working.

Here is what a URL redirect is and why websites depend on them.

## What it is

A URL redirect is an instruction that automatically forwards a visitor from one web address to a different one.

When you request a page that has a redirect in place, the server does not hand over that page. Instead it replies, in effect, "that has moved; go here instead," and your browser obediently fetches the new address. The whole exchange usually happens in a fraction of a second, which is why a redirect often passes unnoticed except for the changed address in the bar.

A web address, often called a URL, is the unique location of a page on the web. A redirect simply connects an old or alternative location to the real one, so requests end up in the right place.

## How a redirect works

Redirects are built into the language web servers use to respond to requests, the same system of HTTP status codes behind messages like the [404 error](/technology/what-is-a-404-error). When a redirect is set up, the server answers a request with a special code in the 3xx family, the group that means "redirection," along with the new address to go to.

The steps look like this:

1. You request a web address.
2. The server replies with a redirect code and the new destination.
3. Your browser automatically requests that new destination.
4. The destination page loads, and its address shows in your browser.

Because the browser handles steps three and four instantly, the experience feels like a single, slightly slower page load. These exchanges travel over the same web protocols that carry everything else, including secure connections; for how the secure layer works, see [what HTTPS is](/technology/what-is-https).

## Permanent versus temporary redirects

Not all redirects mean the same thing. The two you will hear about most are the 301 and the 302, and the difference matters.

- **301 — permanent.** This says the page has moved for good and the old address should no longer be used. It is the right choice when you reorganise a site, change a page's address, or merge content.
- **302 — temporary.** This says the move is only for now and the original address will return later. It suits situations like sending visitors to a holding page during maintenance, or to a seasonal promotion.

The distinction is not just bookkeeping. Search engines treat the two differently. A 301 tells them to update their records and pass the old page's standing to the new address, while a 302 tells them to keep the original on file because it will be back. Using the wrong one can confuse search engines and harm a site's visibility.

> The rule of thumb: use a 301 when the change is permanent, and a 302 only when you genuinely intend to bring the original page back.

## Why websites use redirects

Redirects are not an obscure technical nicety; they solve everyday problems that every growing website faces. Common uses include:

- **Keeping old links alive.** When a page moves, a redirect sends anyone using the old address, whether from a bookmark, an old post or another site, to the new one instead of a dead end.
- **Avoiding 404 errors.** Without a redirect, a moved page leaves visitors stranded on a "not found" message. A redirect turns that into a smooth journey to the right place.
- **Tidying up addresses.** Sites often forward several versions of an address to a single canonical one, for example sending the version with "www" and the version without to the same place.
- **Switching to secure connections.** Many sites automatically redirect visitors from the insecure version of an address to the secure one, helping protect the connection.
- **Handling rebrands and mergers.** When a company changes its name or combines websites, redirects forward the old domain to the new one so years of links keep working.

In each case the goal is the same: make sure visitors and links end up where the content actually lives, even after it has moved.

## When redirects go wrong

Redirects are helpful, but they can be misused, and a few pitfalls are worth knowing.

The most common problem is a **redirect chain**, where one address redirects to a second, which redirects to a third, and so on. Each hop adds a little delay and uses extra [bandwidth](/technology/what-is-bandwidth), so a long chain slows the page and can frustrate both visitors and search engines. A close cousin is the **redirect loop**, where addresses point back and forth at each other endlessly; browsers detect this and give up with an error.

Another mistake is redirecting many unrelated old pages to a single, generic destination such as the homepage. Visitors expecting specific content land somewhere irrelevant, and search engines may treat the redirects as unhelpful. The better approach is to send each old page to its closest matching new page.

Used carefully, though, redirects are a clean and reliable tool. The fixes for the problems above are straightforward: keep chains short, point pages to relevant destinations, and review redirects periodically so they continue to make sense as a site evolves.

## A quick comparison

| Redirect | Meaning | Typical use |
| --- | --- | --- |
| 301 | Permanent move | Reorganised or renamed pages, merged content |
| 302 | Temporary move | Maintenance pages, short-term promotions |

Choosing correctly between these two is most of what good redirect management involves.

## The bottom line

A URL redirect automatically forwards a visitor from one web address to another, usually so quickly you barely notice. It works through HTTP redirection codes, with a 301 signalling a permanent move and a 302 a temporary one, a distinction that matters to both visitors and search engines.

Redirects keep old links working, prevent visitors from hitting a 404 when a page has moved, tidy up web addresses and ease rebrands and security upgrades. Their main pitfalls, long chains and irrelevant destinations, are easy to avoid. Far from a trick, the humble redirect is one of the quiet pieces of plumbing that keeps the web joined up as it constantly changes.

## Frequently asked questions

### What is a URL redirect in simple terms?

It is an instruction that automatically sends you from one web address to another. You click or type one link and your browser is forwarded to a different page, often without you noticing.

### What is the difference between a 301 and a 302 redirect?

A 301 redirect is permanent, signalling that a page has moved for good, while a 302 redirect is temporary, meaning the original page will return later. Search engines treat the two differently.

### Are redirects bad for a website?

Used correctly they are essential and helpful, keeping old links working and guiding visitors. Problems only arise from long chains of redirects or pointing many old pages at an unrelated one, which can slow loading and confuse users.

## Sources

- [MDN Web Docs: Redirections in HTTP](https://developer.mozilla.org/en-US/docs/Web/HTTP/Redirections)
- [MDN Web Docs: 301 Moved Permanently](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/301)

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