Broken Link Checker
Free online broken link checker — cleaning up link rot on a page in one pass.
Why scan for dead links with ToolJiffy Broken Link Checker?
Broken links (links returning HTTP 404 Not Found errors) create frustrating dead ends for website visitors and send negative quality signals to search engine crawlers like Googlebot. Accumulated "link rot" wastes search engine crawl budget and lowers search rankings. ToolJiffy Broken Link Checker scans HTML markup for dead links instantly in your browser.
- In-Browser HTML Link Extraction: Extracts all
<a href>anchor tags and<img src>assets from HTML markup. - Asynchronous HTTP 404 Error Detection: Sends parallel HEAD/GET requests in browser memory to verify HTTP response statuses.
- Categorized Error Reporting: Separates working 200 OK links from broken 404 pages, 500 server errors, and 301 redirects.
- 100% On-Device Browser Security: Scans links locally in browser memory without sending data to cloud servers.
Browser-native Parallel Link Verification Engine
ToolJiffy's broken link checker uses an in-memory DOMParser engine to query element links, formatting parallel asynchronous fetch() requests to verify server response codes.
Whether auditing blog posts before publishing, scanning client websites during redesigns, or cleaning up documentation link rot, instant broken link checking ensures zero dead links.
Client-side security for private link audits
Auditing links for unreleased web pages, private documentation portals, or client staging sites should never route requests through remote tracking servers.
ToolJiffy operates on a zero-cloud architecture. All link checks execute directly from your browser session. Your URL lists never leave your device.
Step-by-step guide to finding broken links
- Paste HTML markup: Copy web page source code or article HTML into the input editor above.
- Run broken link scan: Click Scan Broken Links to extract and test all embedded URLs.
- Review broken 404 links: Inspect the flagged 404 list and update or remove dead link references.
Frequently asked questions
How does the in-browser Broken Link Checker work?
ToolJiffy parses HTML source code to extract anchor links (<a href="...">), image links (<img src="...">), and script resources, sending asynchronous HEAD/GET requests in browser memory to test for broken 404 URLs.
What is link rot and why are broken links harmful to SEO?
Link rot refers to links that point to deleted or moved web pages (returning 404 errors). Broken links harm search engine rankings, waste Googlebot crawl budget, and create poor user experiences.
What link types can be scanned for 404 errors?
Scan internal page links, external outbound links, image source URLs, CSS stylesheets, and script dependencies.
Is my page HTML or scanned URL list sent to any server?
No, 100% private. All HTML parsing and HTTP link checks execute locally inside your browser memory. Your page markup and URL lists never leave your device.
What is the difference between an internal and external broken link?
An internal broken link points to a non-existent page on your own domain. An external broken link points to a dead URL on a third-party website.
How does CORS affect checking external third-party links in the browser?
Some external servers restrict Cross-Origin Resource Sharing (CORS). ToolJiffy handles CORS responses gracefully, identifying valid links vs network restrictions.
Can I scan HTML template snippets before deploying live?
Yes! Paste raw HTML code or blog post markup directly into the editor to test embedded links for 404 errors before publishing.
Is ToolJiffy Broken Link Checker free without limits?
Yes! ToolJiffy is 100% free with unlimited usages, zero account sign-ups, and zero watermarks.
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