Free In-Browser Broken Link Checker
Detect dead hyperlinks, broken image assets, and failed network redirects on any webpage. Runs 100% in your browser with zero server queues.
Instant Link Audit
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You've used your 3 free link checks today. Create a free account to audit up to 500 URLs in batch with automated CI/CD runs.
Auditing links...
Sandbox Prober
How In-Browser Probing Eliminates Link Rot
Traditional cloud crawlers rely on blocked IP pools and superficial HTML scans. ScanTheThings inspects true DOM states in your browser.
01 // SEO & NavBoost Signals
Why Dead Links Silently Destroy Rankings
The Problem:
When search engine bots hit 404 dead ends, crawl budgets get exhausted before vital commercial pages are indexed. Internal PageRank leaks, while broken user clicks create rapid back-button bounces that degrade NavBoost ranking metrics.
How ScanTheThings Solves It:
Our prober evaluates both internal relative links and external third-party anchors. We follow 301/308 redirect cascades to their terminal destination, flag 404/410/500 failures, and give you the exact DOM selector to patch the broken tag instantly.
404 DETECTED
// AUDIT: Live DOM Prober
Latency
/pricing-tiers
200 OK
42ms
/blog/archived-roadmap
404 NOT FOUND
118ms
/features → /product
301 REDIRECT
65ms
Query:
a[href*="/blog/archived-"]
1-Click Fix Prompt →
02 // WAF-Resilient Engine
Zero IP Blacklisting & VPN Auditing
The Problem:
Cloud-based link scanners send hundreds of bot requests from shared AWS and DigitalOcean IP blocks. Cloudflare WAF, Akamai Bot Manager, and AWS Shield instantly challenge or block them with 403 or 429 errors.
How ScanTheThings Solves It:
Audits run in authentic browser contexts using native DOM extraction. You can test private pre-release staging sites behind corporate VPNs or firewall allowlists without configuring complex proxy tunnels or security bypass tokens.
WAF AUTHENTICATED
Execution Environment
In-browser client sandbox
// TAILSCALE / VPN
>
https://staging.internal.corp
Local Origin
Authentic Client Fingerprint
0 WAF Challenges
VPN Route:
WireGuard / Tailscale Active
Hyperlinks Verified:
148 Anchors in 1.4s
Cloud Data Exfiltration: ZERO (100% In-Memory)
AES-GCM Local
Private intranet allowlists respected
✓ 0 IP Blocks
03 // Continuous Delivery
Automated Link Gates in CI/CD Pipelines
The Problem:
Refactoring page URL slugs, renaming docs folders, or publishing content migrations routinely causes cascading 404 broken link regressions that go unnoticed until prospective customers complain or churn.
How ScanTheThings Solves It:
Incorporate ScanTheThings into your GitHub Actions workflow or deployment status webhook. Run batch audits over 500 pages with one CLI command and gate merge requests automatically when unexpected broken links are introduced.
PASSED (42s)
GitHub Actions Link Gate
Trigger: [deployment_status]
// CI/CD PIPELINE
# Verify up to 500 URLs on deployment
name: Continuous Link Audit
on: [deployment_status]
jobs:
audit-links:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- run: npx scanthethings --suite production-links --fail-on=404
✓ 312 Hyperlinks Audited • 0 Failures
Exit 0
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