What causes a 404 error?

404 errors occur when a webpage has been deleted, renamed, or moved to a new URL without setting up a 301 redirect, or when a user makes a typo in the URL.

Do 404 errors hurt Google rankings?

While natural 404s for removed pages are normal, widespread broken internal links degrade user experience and waste Googlebot crawl budget.

What is a soft 404 error?

A soft 404 occurs when a missing page displays a 'not found' message to the user but returns a 200 OK status to search engines, confusing crawlers.

404 Checker

Batch scan web URLs to detect 404 Not Found errors, missing pages, and dead ends.

TL;DR: 404 Checker is a free, browser-based tool that lets you batch scan web URLs to detect 404 Not Found errors, missing pages, and dead ends.

Bulk 404 Error Detector

Enter multiple page URLs (one per line or comma-separated) to batch-scan for 404 Not Found errors.

What Is the 404 Checker?

404 Checker scans website pages and internal links to locate broken 404 Not Found error pages, missing media assets, and dead external citations.

Step-by-Step: Using This Tool

Enter target URL or list of links to audit.
Click 'Scan for 404s' to test response codes.
View list of dead links with referring page locations.
Update or redirect broken URLs.

Maximize Your Results

Custom 404 Pages: Ensure your website has a helpful custom 404 page with search navigation to recover lost visitors.
Set 301 Redirects for Deleted URLs: Redirect deleted popular pages to the closest relevant category page.
Monitor Regularly: Broken links accumulate naturally over time as external websites change their URL structures.

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Live URL Analysis & Privacy

When auditing a live URL, public webpage markup is fetched via our secure proxy service. When using Paste HTML or file upload mode, all analysis runs 100% locally in your browser with zero network requests.

Frequently Asked Questions

: 404 errors occur when a webpage has been deleted, renamed, or moved to a new URL without setting up a 301 redirect, or when a user makes a typo in the URL.
: While natural 404s for removed pages are normal, widespread broken internal links degrade user experience and waste Googlebot crawl budget.
: A soft 404 occurs when a missing page displays a 'not found' message to the user but returns a 200 OK status to search engines, confusing crawlers.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). 404 Checker [Software]. https://nexlove.org/tools/404-checker.html

“404 Checker.” NexLove.org, 2026, nexlove.org/tools/404-checker.html.

NexLove.org (2026) 404 Checker. Available at: https://nexlove.org/tools/404-checker.html (Accessed: 2026).

@misc{nexlove_404_checker,
  title = {404 Checker},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/404-checker.html}
}

Embed This Tool

Add the live 404 Checker tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/404-checker.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="404 Checker — NexLove.org" loading="lazy"></iframe>

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