Broken Link Checker

The Broken Link Checker is a free online tool that checks a pasted list of URLs for dead links, helping you find 404 errors and failed pages before your visitors do. Broken links are silent killers of user trust and SEO: they frustrate readers, waste crawl budget and signal neglect to search engines. Whether you are auditing your own site after a redesign or vetting a list of resource links for a blog post, this checker scans your URLs and reports which ones are alive and which have died. It is a practical member of our SEO tools collection.

Here is how it works, honestly: you paste a list of URLs — one per line — and the tool requests each one from your browser, reporting the HTTP status it receives. Live pages return success codes, dead pages return 404s, and redirected URLs show where they now point. One important caveat, stated upfront: browsers enforce CORS security rules, which means some websites block cross-origin status checks from web pages. When that happens, the tool tells you plainly that the check was blocked rather than inventing a result — because a checker that guesses is worse than no checker at all. For background on why links die, Wikipedia’s article on link rot explains the phenomenon well.

Site owners, bloggers and SEO professionals use this checker as a quick first pass before deeper audits. It is free with no limits, runs entirely in your browser and asks for nothing — no signup, no software, no crawler to configure. Pair it with our Meta Tag Generator for on-page polish, the robots.txt Generator for crawl control and the Slug Generator for clean URLs — or browse all free online tools.

How to Use the Broken Link Checker

1. Open the Broken Link Checker: Load the tool page on InstantAccessTools. The URL input box and results area appear immediately, with the interactive checker sitting right above this guide.
2. Gather the URLs to check: Collect the links you want to test — export them from your CMS, copy them from a spreadsheet or pull them from Google Search Console’s coverage reports. One URL per line is the format.
3. Paste the list into the input box: Drop your URLs into the large text area, each on its own line. The tool accepts dozens of URLs at once, so audit a whole resource page or sitemap section in one go.
4. Remove duplicates and junk lines: Quickly scan the pasted list for duplicates, blank lines or truncated URLs. Clean input produces clean results and avoids wasting checks on malformed entries.
5. Start the check: Press the check button and watch the tool work through your list. Each URL is requested in turn, and statuses stream into the results area as they complete.
6. Read the status for each URL: Green success codes mean the page is alive; 404 means not found; other 4xx and 5xx codes indicate client or server problems; redirects show their destination so you can update the link directly.
7. Note the CORS-blocked entries: Some URLs will report that the check was blocked by the site’s CORS policy. This is a browser security limitation, not a verdict on the link — verify those few manually in a new tab.
8. Export or copy the failures: Copy the dead and problematic URLs into your task list or spreadsheet. Having the exact failing addresses makes the fix-up pass dramatically faster.
9. Fix, redirect or remove: For each dead link: update it to the correct URL if the content moved, set up a redirect if you control the target, or remove the link if the resource is gone for good.
10. Re-check after fixing: Run the corrected list through the checker once more to confirm everything now resolves. A clean second pass is the satisfying proof your audit worked.
11. Prioritize by page importance: Not all dead links are equal. Fix broken links on high-traudit pages, popular posts and conversion pages first, then work down to archives.
12. Set up monitoring: After the initial cleanup, schedule recurring checks. Link rot is continuous, so a one-time audit decays in value within months.
13. Verify fixes in context: Open each fixed page and click the updated link yourself. Automated checks confirm the status code; human clicks confirm the user experience.

Key Features of Our Broken Link Checker

• Bulk URL checking: Paste an entire list and check it in one session instead of opening tabs one by one — the tool is built for audits, not single links.
• Clear status reporting: Each URL gets a plain-language verdict: alive, not found, redirected, server error or check blocked. No cryptic codes without explanation.
• Redirect destination display: When a URL redirects, the tool shows where it lands, so you can update the link to point directly at the final destination instead of chaining hops.
• Honest CORS handling: Rather than fabricating results for sites that block browser-based checks, the tool labels them clearly as blocked. Honest limitations beat confident lies.
• Live streaming results: Statuses appear as each check completes, so you can start investigating failures while the rest of the list is still processing.
• No crawler to configure: Server-side link crawlers need setup, allowlisting and patience. This checker needs only your URL list and a browser tab.
• Private local operation: Your URL list never leaves your device. Auditing a client’s unpublished staging URLs or internal pages stays completely confidential.
• Free and unlimited: Check as many lists as you like with no account and no per-URL metering — run the audit weekly if you want.
• Plain-language verdicts: Results read as alive, not found, redirected or blocked — no decoding of raw HTTP semantics required.
• Session-friendly: The tool remembers nothing between visits, so audits of sensitive staging environments leave no trace behind.
• Zero learning curve: If you can paste a list, you can run an audit. There is deliberately nothing else to learn.

Broken Link Checker Use Cases

Post-redesign audits

After migrating or redesigning a site, old URLs break in bulk. Running your key page lists through the checker catches the casualties before Google and your visitors do.

Resource page maintenance

Bloggers linking to external tools and studies accumulate dead links over time. A quarterly check of resource pages keeps your recommendations trustworthy.

Broken link building

SEOs find dead pages on other sites, then pitch their own content as a replacement. This checker verifies candidates quickly during prospecting.

E-commerce catalog checks

Online stores with manufacturer and supplier links suffer when vendors restructure sites. Regular checks keep product pages free of dead outbound links.

Documentation quality

Technical docs riddled with 404s erode developer trust fast. Teams run their docs’ link lists through the checker before each major release.

Client SEO reports

Freelancers auditing a new client’s site produce a dead-link inventory in minutes, which makes an impressive and actionable first deliverable.

Affiliate link maintenance

Affiliate marketers lose commissions to dead merchant links silently. Regular checks protect revenue that would otherwise evaporate unnoticed.

Academic citations

Researchers and students verify reference URLs before submission, since dead citations undermine otherwise solid work.

Why Use Our Free Broken Link Checker?

The reason to use our free Broken Link Checker is that it respects both your time and your intelligence. Manually clicking through dozens of links is mind-numbing work that humans do badly — attention drifts, tabs multiply and dead links slip through. Automating the first pass turns an hour of tedium into a minute of pasting, and the tool’s honest reporting means you can trust what it tells you, including when it tells you a particular check was blocked and needs a manual look.

The second reason is the honesty about limitations. The dirty secret of browser-based checkers is CORS: many sites block cross-origin requests, and lesser tools either silently skip those URLs or — worse — mark them as broken when they are perfectly fine. Ours labels blocked checks explicitly, so you never waste time fixing links that were never broken. That transparency is rare, and it is what separates a tool from a toy.

Finally, it fits the way real maintenance work happens: quick, frequent and free. Link rot never stops — studies suggest a meaningful percentage of links die every year — so auditing needs to be cheap enough to do often. With no signup, no limits and no software to maintain, this checker makes the quarterly link audit something you actually do instead of something you keep meaning to do.

Tips for Best Results

• Run checks during off-peak hours for large lists; some servers rate-limit rapid sequential requests from one browser.
• Always manually verify CORS-blocked URLs in a fresh tab before deciding they need fixing — blocked is not broken.
• Prioritize fixing broken links on your highest-traffic pages first; a dead link on a popular post costs more than one on an archive page.
• When external content moved, link to the new location rather than deleting — your readers still want the resource.
• Set up redirects for your own moved pages so both visitors and other sites’ links keep working.
• Keep a simple log of each audit’s dead links and fixes; patterns reveal which external sites are unreliable link targets.
• Check links in email newsletters before sending — dead links in a broadcast email cannot be unsent.
• Combine this checker with Google Search Console, which reports the broken links Google itself encounters on your site.
• For very large sites, audit section by section rather than all at once to keep results manageable and actionable.
• Export failing URLs with their source pages, not just the dead addresses — you need to know where to fix them.
• Watch for redirect chains longer than two hops; each hop costs speed and dilutes SEO value.
• After major CMS updates, re-audit immediately — migrations are the number one cause of mass link death.
• Consider archiving important external references via the Wayback Machine so readers have a fallback when sources vanish.

Broken Link Checker FAQs

Is the Broken Link Checker free?

Yes — unlimited checks, no account, no cost. Paste your URL lists and audit as often as you like. Bloggers, SEOs, store owners and documentation teams all audit freely without accounts.

How do I check my links?

Paste your URLs one per line into the input box and press check. The tool requests each URL and reports its status as results stream in.

What does CORS-blocked mean?

Some websites block cross-origin requests from browser pages as a security measure. The tool honestly reports these as blocked rather than guessing — open those URLs manually in a new tab to verify them. The limitation comes from browser security policy, and the tool is upfront about it instead of faking results.

Does it crawl my whole website automatically?

No — it checks exactly the list you paste. For full-site crawls you would use dedicated crawler software; this tool excels at targeted list audits.

What should I do with dead links?

Update them to the correct URL if the content moved, redirect them if you control the target, or remove them if the resource is permanently gone. Start with your most-visited pages, where each dead link costs the most trust and the most conversions.

Can it check links on password-protected pages?

Only URLs your browser can reach without special authentication will check cleanly. Staging sites behind logins may report errors that do not reflect real problems.

How often should I audit links?

Quarterly is a good rhythm for active sites, plus a check after any redesign, migration or bulk content change. Many teams audit quarterly and after every site change — a rhythm that catches rot before visitors do.

Is my URL list uploaded anywhere?

No. The list stays in your browser and each check goes directly from your browser to the target URL. Nothing is stored or logged.

Link rot never sleeps, but neither does good maintenance — and the free Broken Link Checker makes audits fast, honest and repeatable, with clear reporting on every URL including the ones browsers will not let it check. Paste your URL list above, fix what is dead, verify the repairs and re-check for the satisfying clean bill of health. Then strengthen the rest of your site with the Meta Tag Generator for search snippets, the robots.txt Generator for crawl control and the Slug Generator for clean addresses. Or explore SEO tools and all free online tools for the full site-owner toolkit.