Broken Link Checker: How to Find & Fix Broken Links (2026)

A broken link checker is a tool that crawls your website and flags every link that no longer works — the dead ends that frustrate visitors, waste crawl budget, and quietly drag down your search rankings. Broken links are one of the most common technical issues on the web, and one of the easiest to fix once you can actually see them. The hard part is finding them, because they hide across hundreds of pages and pile up over time as other sites change URLs or go offline. This guide explains what broken links are, the damage they do, how to find them with free tools, and how to fix them — including why clean links increasingly matter for AI answer engines deciding which pages to cite.

What Are Broken Links and Why Do They Hurt SEO?

A broken link is any hyperlink that points to a page or resource that can no longer be reached. Click it and instead of the content you expected, you get an error — usually a "404 Not Found" page. The link is dead. It leads nowhere useful.

Links break for ordinary reasons:

A page gets deleted or moved without a redirect.
A URL is mistyped when the link is added.
An external site you linked to changes its structure or shuts down.
A domain expires or is redesigned and old paths disappear.
An image, PDF, or script file is renamed or removed.

The damage shows up in two places at once. For users, a broken link is a small betrayal of trust — they clicked expecting an answer and hit a wall. Enough dead ends and they assume the whole site is neglected, then leave. For search engines, broken links signal poor maintenance and waste crawl budget on pages that return nothing. Google has confirmed that 404s don't directly penalize a site, but the second-order effects are real: lost link equity, weaker internal linking, higher bounce rates, and crawlers spending time on errors instead of your real content.

There's a compounding problem, too. When a page with valuable backlinks 404s, the authority those links passed evaporates. You earned the links; now they point at nothing.

Types of Broken Links to Watch For

Not every broken link is the same, and a good broken link checker separates them so you know where to focus.

404 errors (internal). Links on your own site that point to pages you've deleted or moved. These are the highest priority — they're entirely within your control and they fragment your own site structure.
Broken external links (outbound). Links from your pages to other websites that have since died. They make your content look stale and send users to dead ends.
Broken inbound links (backlinks). Other sites linking to a page on yours that no longer exists. Each one is lost authority you can often recover with a redirect.
Broken images and assets. Missing image files, scripts, or stylesheets. They break layout and signal neglect even when the text loads fine.
Redirect chains and loops. Not "broken" in the strict sense, but a chain of redirects (A to B to C) slows pages and dilutes link equity. Many checkers flag these alongside true dead links.

Knowing the type tells you the fix. Internal 404s usually need a redirect or a corrected URL; broken outbound links need updating or removal; lost backlinks are an opportunity to recover authority.

How to Find Broken Links: Free Tools and Methods

You have several ways to check broken links, from one-click web scanners to full desktop crawlers. The right choice depends on site size and how often you audit. Here's how the most popular options compare.

| Tool | Type | Best for | Free tier | |---|---|---|---| | Google Search Console | Web (your site only) | Ongoing 404 monitoring on verified sites | Free | | Dead Link Checker | Online scanner | Quick one-off checks of a single site | Free | | W3C Link Checker | Online scanner | Standards-based checks, single pages | Free | | Screaming Frog | Desktop crawler | Deep technical audits, large sites | Free up to 500 URLs | | Ahrefs Site Audit | Cloud SEO platform | Broken backlinks + full SEO health | Limited free / paid | | Sitechecker | Online + monitoring | Recurring scans with full reports | Free up to ~100 pages |

A few practical methods:

Start with Google Search Console. If your site is verified, the Pages report under Indexing lists URLs returning "Not found (404)." It's free, it reflects what Google actually sees, and it updates continuously — the best starting point for any site you own.
Run a free online scanner for a fast snapshot. Tools like Dead Link Checker or W3C Link Checker need only a URL and surface dead links in minutes. Great for a quick audit or a site you don't own.
Use a desktop crawler for depth. Screaming Frog crawls your whole site (free up to 500 URLs) and exports every 4xx and 5xx response, plus redirect chains, so you can find broken links at scale and slice the data.
Check backlinks with an SEO platform. Ahrefs and similar tools reveal broken inbound links — the lost authority you can recover by redirecting dead URLs to live pages.

If you want a broader read on technical health alongside dead links, AEObot's free audit scores your page on on-page and technical readiness — useful context for whether broken links are one problem or a symptom of wider neglect.

How to Fix Broken Links

Finding them is half the job. Fixing them is straightforward once you've sorted them by type. Work through this checklist:

Correct simple typos. Many internal 404s are just a misspelled URL in the link itself. Edit the link to the correct path and you're done.
Add 301 redirects for moved pages. When a page has permanently moved, redirect the old URL to the new one. This preserves link equity and sends both users and crawlers to the right place. This is the fix for most internal 404s that have backlinks.
Update or replace dead external links. If a site you linked to moved its content, update the URL. If it's gone for good, link to an equivalent source or remove the link.
Restore or recreate valuable pages. If a deleted page still earns traffic or backlinks, consider bringing it back rather than redirecting — especially if nothing else covers the topic.
Fix broken images and assets. Re-upload missing files or update the paths so layouts render correctly.
Build a custom 404 page. You'll never catch every dead link instantly, so make the fallback helpful: a search box and links to popular pages keep users on-site instead of bouncing.

Then make it a habit. Links rot continuously as the web changes around you, so schedule a recurring scan — monthly for most sites, weekly for large or fast-moving ones — rather than treating it as a one-time cleanup.

Why Clean Links Matter for Crawlability and AI Answer Engines

Broken links have always been a classic SEO and UX issue. In 2026 they carry a new cost: they hurt your visibility in AI answer engines.

Here's why. Crawlers — Google's and the bots behind ChatGPT, Perplexity, and Gemini — have a finite budget for any site. Every dead link they hit is wasted effort that could have gone toward discovering and understanding your real content. A site littered with 404s is harder and slower to crawl, which means fewer of your pages get indexed and considered. (For the bigger picture on how this fits modern search, see our guide to answer engine optimization.)

The stakes are higher with AI. Answer engines synthesize responses from sources they trust, and they favor content that's clean, well-structured, and reliable. A page full of broken outbound links reads as low-quality and poorly maintained — exactly the signal that makes an AI less likely to cite it. Worse, if an AI tries to follow a link to your page and hits a 404, that citation opportunity is gone. Clean internal linking, by contrast, helps these systems map how your content connects and which pages are authoritative, which is a foundation of strong AI search visibility.

Put simply: fixing broken links is no longer just housekeeping. It's table stakes for being crawlable, indexable, and citable across both traditional search and the AI answers reshaping it.

Want to see how your pages stack up for AI search? Run a free scan at aeobot.io/scan and find out whether answer engines can actually find, read, and cite your content.

Frequently Asked Questions

What is a broken link checker?

A broken link checker is a tool that scans your website and identifies every hyperlink that no longer works — links returning errors like 404 Not Found. It crawls your pages, tests each link, and reports the dead ones so you can fix them before they hurt your rankings or frustrate visitors.

Is there a free broken link checker?

Yes. Google Search Console reports 404s on any site you verify, completely free. Free online scanners like Dead Link Checker and W3C Link Checker test a site from a single URL, and Screaming Frog crawls up to 500 URLs free. For most small sites, these cover everything you need at no cost.

How do broken links affect SEO?

Broken links don't trigger a direct penalty, but they waste crawl budget, fragment your internal linking, raise bounce rates, and let the authority from backlinks pointing at dead pages go to waste. The combined effect weakens how search engines crawl, index, and rank your site over time.

How often should I check for broken links?

For most sites, a monthly scan is enough to catch new breaks before they accumulate. Large sites, news publishers, or anything that links heavily to external sources should check weekly, since outbound links break whenever the sites they point to change or disappear.

What's the difference between a broken link and a redirect?

A broken link leads to a page that no longer exists and returns an error. A redirect points an old URL to a working new one, so the user still lands on real content. Redirects are the standard fix for broken internal links — they recover the lost path and preserve link equity.