Online Broken Link Checker and Editor for Website, PDF, Markdown & GitHub
Enter your website URL to scan for broken links (e.g., https://example.com). For Git URLs, use the Markdown menu. For PDF URLs, use the PDF menu.
Pro input tip
Use full page URLs (not homepage only) when you want precise issue discovery. Example: https://example.com/docs/getting-started
Check broken links across websites, WordPress pages, online PDFs, and GitHub/GitLab READMEs in one place.
Why Use DeadLinkTool
A practical workflow for website audits, PDF link validation, markdown repair, and search visibility improvements.
SEO Audits
Identify 404 errors across websites, landing pages, and indexed PDF assets before they waste crawl budget and hurt rankings.
GitHub, GitLab & Docs
Audit READMEs and docs, validate branch-aware paths, and generate corrected markdown ready to commit.
PDF & 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.
Learn the full technical impactFrequently Asked Questions
Everything you need to know about link health, markdown fixes, Git workflows, SEO impact, and how to use our tools.
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.
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.
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.
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.
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.
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.