301 Redirect vs 302: SEO, Caching, HTTP

301 redirect vs 302 comes down to intent, caching, and request handling. A 301 signals a permanent move. A 302 signals a temporary move. For developers, the bigger practical difference is that 302 may change request method in practice, while 307 and 308 preserve it.

Redirect choice affects search engines, browsers, caches, forms, APIs, and rollback risk. Google's guidance says redirects can pass signals, including through temporary redirects, but implementation intent still matters for long-term indexing and consolidation, as explained in Google Search Central's redirect documentation.

301 redirect vs 302 at a glance#

The old SEO shorthand was simple: 301 for permanent, 302 for temporary. That is still directionally right. The modern developer answer is more precise: use the status code that matches both your business intent and your HTTP behavior.

What a 301 redirect means#

A 301 is a permanent redirect. It tells clients that the resource has moved to a new URL and that future requests should use that destination.

This is the right choice for canonicalization, domain changes, HTTP-to-HTTPS migrations, trailing-slash cleanups, and retired URLs that have a clear replacement. If you want to audit those moves quickly, YepAPI's On-Page Instant endpoint is the fastest way to inspect a page response and related technical signals without building your own crawler first.

What a 302 redirect means#

A 302 is a temporary redirect. It tells clients that the original URL may come back, so the move should not be treated as final.

That makes 302 appropriate for short-lived tests, campaign routing, limited maintenance windows, geolocation experiments, and temporary stock or availability detours. A 302 is not inherently bad for SEO. It becomes a problem when it stays in place for months and starts acting like a permanent decision without being declared as one.

How search engines treat 3xx redirects today#

Google no longer treats 301 as the only redirect that can pass ranking signals. Google has said that all 3xx redirects can pass PageRank, which is why temporary redirects do not automatically block signal flow. The practical difference is intent, consolidation, and how consistently search engines decide the destination should replace the source over time.

That nuance is why teams still misuse temporary redirects. If a URL has moved for good, a permanent code gives the cleanest signal for indexing, internal linking cleanup, and canonical alignment. If you want to test the final rendered state of redirected pages at scale, YepAPI's Web Scraping API is the code-first option when your audit needs raw fetches beyond a manual browser check.

301 redirect vs 302 for SEO#

For SEO, the biggest question is not which code is "stronger." The real question is whether the code matches reality.

Use a 301 when you want search engines to consolidate signals, replace the old URL in search, and treat the destination as the lasting location. Use a 302 when the original URL should remain the canonical home once the temporary condition ends.

A mismatch creates avoidable noise:

1. A long-term 302 can delay consolidation.
2. A mistaken 301 can be cached and linger after rollback.
3. Redirects that conflict with canonicals create mixed signals.
4. Old internal links can keep feeding the wrong URL.
5. Chains dilute clarity and slow crawling.

If you are checking whether pages still resolve, redirect, or canonicalize the way you expect, YepAPI's On-Page Instant endpoint and On-Page Content endpoint let you validate technical page behavior in code instead of spot-checking by hand.

redirect 301 vs 302 vs 307#

The missing branch in most comparisons is 307. A 307 is the temporary redirect you should prefer when request method preservation matters.

According to the HTTP Semantics specification at RFC 9110, 307 indicates a temporary redirect and requires the user agent not to change the request method if it automatically follows the redirect. That matters for POST requests, checkout flows, authentication handoffs, and API endpoints.

Choose among them like this:

For web pages reached by GET, 302 usually works. For application traffic that must remain POST, 307 is safer.

HTTP 302 vs 307#

HTTP 302 vs 307 is mostly about compatibility and method handling. Historically, many clients treated 302 loosely and changed POST to GET when following the redirect. MDN's 307 Temporary Redirect reference explains that 307 exists specifically to preserve the method and body.

That is why 302 is often the wrong temporary code for developers, even when SEOs are comfortable with it. If a checkout POST, webhook, login callback, or API write operation is being rerouted for a short period, use 307 instead of hoping every client preserves the original method.

HTTP 301 vs 308#

HTTP 301 vs 308 follows the same pattern on the permanent side. A 308 is the permanent redirect that preserves request method and body.

Use 308 when a permanent move must keep POST as POST. That is common in APIs, application routes, and form endpoints. For standard content pages served through GET, 301 is still the familiar and widely supported default.

301 vs 303 redirect#

A 303 is different from both 301 and 302. It tells the client to fetch a different resource with GET, which is why it is often used in Post/Redirect/Get workflows after a form submission.

Use 303 when the point of the redirect is not "the same resource moved," but "your submission succeeded, now view the result page." Do not substitute it for a migration or canonicalization redirect.

301 vs 302 redirect caching#

Caching is where bad redirect choices become expensive. A permanent redirect can persist in browser caches, edge layers, and shared intermediaries longer than teams expect.

That means an accidental 301 can keep sending users to the wrong place even after server rules are fixed. Temporary redirects are usually easier to roll back because caches treat them with less permanence, but the actual behavior depends on client, headers, and intermediaries.

A practical rule:

1. If rollback must be easy, do not ship a 301 casually.
2. If the move is permanent, clean up internal links quickly after the 301.
3. If a CDN adds its own caching behavior, test at the edge, not just in the browser.
4. If HSTS and HTTPS rewrites are involved, separate those effects from your redirect rules.

For browser-side inspection, Chrome DevTools makes it easy to inspect hop-by-hop network behavior. For repeatable engineering checks, curl -I or curl -L -I is often the quickest CLI test, and the curl documentation covers both header inspection and redirect following flags.

When to use 301 redirect vs 302#

Use a 301 when the source URL should stop being the main location.

Common 301 scenarios:

• Site migration to a new domain
• HTTP to HTTPS
• Non-www to www, or the reverse
• Trailing-slash or lowercase normalization
• Merging duplicate pages
• Expired product or article with a clear successor

Use a 302 when the source URL should come back.

Common 302 scenarios:

• Short maintenance windows
• Temporary product unavailability with expected return
• Campaign landing detours
• Limited-time geo routing tests
• A/B tests where the original URL remains primary

If your team wants to discover all affected URLs before changing rules, YepAPI's Domain Keywords endpoint helps identify pages with search visibility so you do not redirect revenue-driving URLs blindly.

Decision matrix for common engineering and SEO scenarios#

This is also where application-level use cases matter. A short-link service pointing every old campaign link to a stable destination should usually return 301. A short-link service that sends users to different locations based on region, inventory, or experiment bucket should usually return 302 or 307.

How to verify one redirect#

For one URL, use three checks:

1. Request the source URL with curl -I to inspect the status code and Location header.
2. Follow the chain with curl -L -I to see every hop.
3. Open DevTools and confirm the browser is not masking a cached result.

You should also verify the canonical on the destination, the internal links that still point at the source, and whether HSTS or server rewrites are changing what you think you are testing.

How to audit redirects at scale#

Manual checks fail fast once you have hundreds or thousands of URLs. At scale, you need to pull status codes, final destinations, hop counts, canonical targets, and content signals in bulk.

YepAPI's On-Page Instant endpoint is the right starting point for technical spot checks in code. YepAPI's Web Scraping API helps when you need fetch-level inspection, and YepAPI's Scrape JS endpoint is useful when redirect behavior depends on client-side execution. If the audit goal is to compare search-facing URLs against live search results, YepAPI's Google SERP API gives you the indexed destination view at scale.

A bulk redirect audit should answer these questions:

• Which URLs return 301, 302, 307, 308, or 200?
• Which URLs redirect in more than one hop?
• Which redirected URLs still appear in XML sitemaps or internal links?
• Which redirects conflict with canonicals?
• Which temporary redirects are older than the change window?
• Which high-value pages changed destination unexpectedly?

If you are prioritizing by business impact, connect your redirect audit to landing pages that win traffic from queries with real demand. Posts like what is search volume and keyword research and strategy are useful context because they explain why some URLs are worth much more careful migration handling than others.

Redirect debugging beyond chains and loops#

Chains and loops are the basics. The messier failures are often elsewhere.

Watch for these issues:

• A 301 points to URL B, but the canonical on B points somewhere else.
• Internal links still target the old URL months after migration.
• Server rules conflict across application, proxy, and CDN layers.
• HSTS makes HTTP-to-HTTPS behavior look like a redirect issue when it is transport policy.
• A temporary redirect survives long past the maintenance window.
• Campaign or app links use 302 when POST-safe handling needed 307.

This is why redirect QA belongs inside a broader technical review. YepAPI's On-Page Instant endpoint is the scalable way to bake those checks into deploy validation instead of treating them as one-off SEO cleanup.

Common mistakes#

1. Using 302 for a migration that is actually permanent.
2. Using 301 before you are confident rollback will not be needed.
3. Using 302 for POST traffic that should have been 307.
4. Using 301 for POST traffic that should have been 308.
5. Leaving chains in place after launch.
6. Forgetting to update canonicals, sitemaps, and internal links.
7. Testing only in a browser and missing CDN or cache behavior.

The practical rule#

Pick the redirect code that matches both duration and method behavior.

If the move is permanent and page-oriented, use 301. If the move is temporary and page-oriented, use 302. If request method must be preserved, upgrade that choice to 308 for permanent or 307 for temporary.

That is the developer-first version of 301 redirect vs 302, and it is the one that prevents most expensive mistakes.

CTA#

Need to check redirect status, canonical tags, and page behavior in code? Use YepAPI's On-Page Instant endpoint to audit one URL or thousands with $5 free credit and no card.

FAQ#

What does a 307 or 308 redirect mean?#

A 307 is a temporary redirect that preserves the original HTTP method and request body. A 308 is the permanent version of that behavior. Use them when a POST request, API call, or form submission must keep its method during the redirect instead of changing to GET in some clients.

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

A 301 means the move is permanent, so clients and search engines should treat the destination as the new long-term URL. A 302 means the move is temporary, so the original URL is expected to remain the main location. The operational difference also includes caching behavior and rollback risk.

Is a 302 redirect bad?#

No. A 302 redirect is correct when the move is genuinely temporary, such as a maintenance window, an experiment, or short-term routing. It becomes a problem when teams leave it in place for months, create mixed signals with canonicals, or use it where 307 would be safer for POST requests.

Should I use 301 or 308?#

Use 301 for most permanent page moves, migrations, and canonicalization fixes involving standard GET requests. Use 308 when the move is permanent but the request method must be preserved, such as API endpoints, webhooks, or form actions that should remain POST after the redirect instead of changing behavior.