Free Website Crash Checker

IsItCrashing is a free website crash checker that lets you enter a public URL and scan discovered pages for broken pages, failed requests, blank pages, broken critical assets, and website health issues.

Yes. IsItCrashing is free to use for first-pass website health checks. You do not need to install an agent, create an account, or add code to your site.

Most scans complete in under a minute. The exact time depends on how many pages are discovered and how fast each page responds. A site with 60 pages typically scans in 20–45 seconds because pages are checked concurrently, not one by one.

The scanner discovers up to 60 internal pages per scan from your sitemap and internal links. It checks the most important pages first based on sitemap priority and crawl depth. Very large sites with hundreds of pages may need a dedicated crawl tool for full coverage.

Down Detector collects crowd-sourced outage reports for major third-party services like Netflix, Twitter, and banks. It tells you whether a big public service is down for everyone. IsItCrashing scans your own website's internal pages using an automated crawler — it tells you which of your pages are broken and exactly why. They answer completely different questions.

Yes, that is one of the most common use cases. After a deployment, migration, redirect change, or CMS update, paste your production URL into IsItCrashing and run a scan. You get a full report of working and failed pages in under a minute, so you can catch regressions before users do.

No. A basic uptime checker usually tests one URL and alerts you after your homepage goes down. IsItCrashing discovers internal pages and reports specific failed pages, blank responses, broken critical assets, and browser crashes when browser checks are available — across all discovered URLs, not just one.

The scanner checks discovered public pages for HTTP 404 and 500 errors, timeouts, redirect loops, blank content where visible HTML does not load, broken critical scripts or stylesheets, failed important requests, and JavaScript crash signals when browser scanning is configured.

A blank page error occurs when a URL returns an HTTP 200 OK status (meaning the server responded) but the page renders no visible content. This usually means a JavaScript hydration failure, a silent server-side rendering exception, or an empty template was served. These are easy to miss because the server reports success even though the user sees nothing.

Yes. Once a scan completes, click the Export PDF button. This opens the browser print dialog with a print-optimized version of the full report — all failed pages, working pages, and diagnostic details. Save it as a PDF to share with your team or include in a client handoff document.

It can detect important JavaScript crashes on browser-checked pages when browser scanning is configured. It is not a replacement for runtime error monitoring, logs, or a full frontend observability setup. For ongoing JavaScript error tracking, use a dedicated error monitoring service.

No automated scanner can find every bug. Use IsItCrashing as a fast first-pass website crash and broken page scanner before deeper QA, monitoring, accessibility testing, or manual review. It is most useful for catching route-level failures and asset errors quickly, not for comprehensive functional testing.

IsItCrashing checks whether your own internal pages load correctly, not whether external links on those pages are valid. It detects internal pages that return 404, 500, or blank responses — which covers the most impactful class of broken page. For external link validation, a dedicated link checker is a better fit.

It is useful for developers, QA testers, SEO teams, agencies, marketers, website owners, and product teams that need a quick check after deployments, migrations, CMS edits, or campaign launches. Any team that ships changes to a public website benefits from a fast automated first-pass before users or search engines encounter problems.

Yes, if the staging website is publicly reachable over HTTPS and protected with HTTP Basic Auth. Enable Basic Auth below the URL field and enter the username and password. The credentials are used only for that scan, sent only to the submitted website origin, and are not stored or included in analytics or reports. Login forms, SSO, VPN-only sites, and IP allowlists are not supported.

Yes. Use IsItCrashing for fast proactive scans before and after changes, then use a monitoring service for ongoing production visibility and alerting. The two tools complement each other — IsItCrashing catches issues at deployment time, monitoring catches issues that emerge later in production.