HTTP Status Code Checker – See What Every URL Returns

How to Use the Checker

1. Paste URLs — one per line, up to 50 per batch.
2. Click "Check Status Codes" — URLs are probed in parallel with a live progress bar.
3. Read the results — status, category, final URL, HTTPS state and an SEO explanation for each code.
4. Export — download the CSV to share with your team or track fixes.

What Each Status Category Means for SEO

• 2xx Success — the page can be indexed. Keep an eye on 204/206 edge cases.
• 3xx Redirects — 301 and 308 pass ranking signals to the new URL; 302/307 do not. Chains waste signal.
• 4xx Client Errors — 404 and 410 pages cannot be indexed; 403 and 401 may block search engines entirely.
• 5xx Server Errors — 500, 502, 503 and 504 make pages temporarily unavailable and hurt crawling.

Status Code Best Practices

• Redirect 404s that still deserve traffic. A removed page with links pointing at it should 301 to its closest replacement.
• Use 410 for intentional deletions. "Gone" tells search engines the removal is deliberate, so it drops out of the index faster.
• Never soft-404. Returning 200 with "Page not found" text confuses search engines — use the real code.
• Keep 503s short. Use them only for true maintenance windows; long 503s hurt crawl frequency.
• Watch redirect hops. Every hop dilutes a little signal; aim for one 301 from old URL to final URL.

Example: Auditing a Site Migration

After a CMS migration, an SEO ran 40 URLs through the checker. Twelve old URLs returned 404, five returned 302 (temporary), and one redirected through four hops. Each 404 got a 301 to its nearest live equivalent, the 302s became 301s, and the chain was flattened. Crawl errors in Search Console dropped by 90% within two weeks.

Common Mistakes & How to Avoid Them

• Checking only the homepage. Status problems hide on category and product pages — check those too.
• Ignoring redirect type. A 302 where a 301 belongs means your old URLs keep their signals hostage.
• Assuming "unreachable" means down. Browser blocks and CORS produce false negatives — verify server-side.
• Forgetting HTTPS. Mixed http/https setups create duplicate-URL signals; the checker flags plain-HTTP results.

Frequently Asked Questions

Can this tool crawl my whole website?

No — it checks the URLs you paste, up to 50 per batch. For full-site crawling use your server logs, a desktop crawler, or this tool in batches.

What does status 0 mean?

It means the browser could not complete the request — timeout, network error, or a server that blocks browser requests. Retry, then verify server-side.

Does the checker follow redirects?

Yes. The "Final URL" column shows where the request actually landed after any redirects.

Is my URL list stored?

No. Checks run from your browser and nothing is logged or stored.

Related SEO Tools

Combine this with the Redirect Chain Checker to flatten hops, the Broken Link Checker for on-page links, and the XML Sitemap Analyzer to see which sitemap URLs return errors.