Website page broken-link checking
Scan the links found on a public page URL to catch dead internal or outbound references before they affect UX, SEO, or AI trust signals.
Learn about website checksBroken Link Checker
Broken Link Checker for Website, PDF, Markdown, and Git Docs
Check broken and dead links in website pages, online PDFs, Markdown files, and GitHub or GitLab docs.
Use Website for page URLs, PDF for online PDFs or uploads, and Markdown for pasted docs or repo files. The live editor helps you fix broken URLs, export Markdown, and patch editable external PDF links online.
Check links found on a public web page URL.
Validate README, docs, and Markdown links including relative paths.
Scan public PDFs or uploaded PDF files for broken links.
Pro input tip
Use full page URLs (not homepage only) when you want precise issue discovery. Example: https://example.com/docs/getting-started
Website broken link checker
PDF broken link and dead URL checker
Markdown link checker for docs and READMEs
GitHub and GitLab docs validation
Live URL editing for supported fixes
How It Works
The one-page experience stays the same, but the workflow is now clearer for search engines, AI systems, and human visitors.
Step 1
Choose the source format
Start with a website page URL, a public PDF, an uploaded PDF file, a Markdown URL, or pasted Markdown content.
Step 2
Review broken, unknown, and healthy links
DeadLinkTool tests the discovered links and groups them by status so you can prioritize real broken-link fixes first.
Step 3
Fix what the tool truly supports
For Markdown, edit broken targets live and export cleaned Markdown. For PDFs, patch editable external links and download the updated PDF. Website scans remain audit-first.
Supported Workflows
These are the main use cases supported today, based on the current scanner and editing features in the app.
PDF broken-link checking and PDF patching
Inspect external PDF URLs and internal PDF destinations. If a PDF contains editable external links, replace them and download a patched file.
Learn about PDF checksMarkdown and repository docs validation
Check pasted Markdown, GitHub READMEs, GitLab docs, and relative links. Then fix broken Markdown targets with the live editing panel.
Learn about Markdown checksGit docs and README link reviews
Validate branch-aware repository links, root-relative docs paths, and README references that often break after file moves or branch renames.
Learn about Git docs checksBroken-link fixing workflow
When the scan supports edits, verify candidate replacements, then export fixed Markdown or a patched PDF so the changes can be published quickly.
Learn about PDF fixingSEO Audits
Identify 404 errors across websites, landing pages, and indexed PDF assets before they waste crawl budget and hurt rankings.
Website broken link workflowGitHub, GitLab & Docs
Audit READMEs and docs, validate branch-aware paths, and generate corrected markdown ready to commit.
Git docs workflowPDF & Markdown Maintenance
Validate downloadable PDFs, test internal destinations, and repair markdown links faster with live replacements.
Link Quality Strategy for SEO, PDF, Markdown & Git Workflows
Combine technical SEO checks with PDF validation and markdown repair to keep websites, indexed documents, and repositories trusted by search engines and AI systems.
Broken Link Risk
Detect 404s, 410s, and dead outbound references before they harm rankings, trust, and user flow.
PDF & Markdown Coverage
Validate internal PDF destinations, GitHub/GitLab markdown links, branch-sensitive paths, and root-relative references in docs.
Fix, Export, and Revalidate
Use live edit mode for markdown, then copy or download corrected docs and recheck linked PDFs before publishing.
Why Link Quality Matters Across Web Pages, PDFs, and Repositories
Search engines and AI assistants evaluate freshness, trust, and crawl efficiency. Fixing dead links in pages, indexed PDFs, and markdown docs reduces crawl waste, improves confidence signals, and strengthens your visibility.
Frequently Asked Questions
Everything you need to know about link health, markdown fixes, Git workflows, SEO impact, and how to use our tools.
What is a dead or broken link?
A broken link (also known as a dead link) is a hyperlink on a webpage that no longer works because the website is experiencing one or more issues. These usually result in a 404 Not Found error, but can also be caused by 410 (Gone), 500 (Server Error), or timeouts.
Why is it important to check for broken links?
Broken links negatively impact both User Experience (UX) and Search Engine Optimization (SEO). They create 'dead ends' for visitors and signal to search engines that your site is poorly maintained, which can lead to lower rankings.
Can I check links in my GitHub README.md?
Yes. Paste your markdown content or a GitHub/GitLab URL and we validate external URLs plus relative paths, including root-relative markdown references.
Can I fix broken markdown links directly in the tool?
Yes. After a markdown scan, use the live fix panel to edit broken targets, copy the updated markdown, or download a cleaned .md file.
Can I edit broken links inside a PDF?
Yes. For external PDF URLs, use the PDF repair panel to replace the link target, optionally update the visible link text, and download a patched PDF.
Can I check broken links in a PDF file?
Yes. Use the PDF tab to scan a public PDF URL or upload a PDF file. We validate both external links and internal PDF destinations.
Do broken links hurt my SEO?
Absolutely. Search engines like Google crawl your site to understand its structure. Too many 404 errors waste 'crawl budget' and can decrease your site's perceived quality, ultimately hurting your rank.
How often should I scan my website?
We recommend a full scan at least once a month, or every time you make significant changes to your site's structure or move pages around.
Guides & Tutorials
Learn how to optimize your website links and improve SEO performance
Edit PDF Links Online: Update Broken PDF URLs Without Rebuilding the File
Learn when you can edit external PDF links directly, when you should keep the original layout intact, and how to patch a PDF URL without rebuilding the whole document.
PDFRead More
Online PDF Link Checker: How to Scan PDF Links Before You Publish
Use an online PDF link checker to validate external URLs, internal PDF destinations, and downloadable documents before they damage SEO or user trust.
PDFRead More
PDF Link Checker Guide: How to Find Broken Links in PDF Files
Learn how to check broken links in PDF files, validate internal and external PDF links, and choose the right workflow for SEO, compliance, and documentation quality.
PDFRead More
Fix Markdown Links Online and Export Clean Documentation
A practical workflow to fix broken Markdown links, verify replacements, and export cleaned docs for GitHub, GitLab, and README publishing.
DevelopmentRead More
Do Broken Links Cause SEO Loss? What Actually Happens in Google
A clear breakdown of crawl, internal linking, and user-signal effects so you can prioritize fixes that protect rankings.
SEO StrategyRead More
Broken Links and SEO: Crawl Budget, Rankings, and Fast Detection
A professional framework to detect and fix broken links before they reduce crawl efficiency, rankings, and trust signals.
SEO StrategyRead More
Showing 1 - 6 of 17 guides
Start With the Right Checker
Choose the workflow that matches your source format so the link audit and fixing steps stay accurate.