Ahrefs Webmaster Tools
Ahrefs
Free site audits and backlink data for websites you verify ownership of.
Best for: Site owners on a budgetVisit Ahrefs Webmaster Tools (opens in new tab)
SEO tools directory
17 Technical SEO audit and site speed tools
Checked on 6 October 2026 · 10 free or freemium · 7 paid
Short answer
What are technical seo audit and site speed tools?
Technical audit tools crawl a website like a search engine and report broken links, redirects, duplicate pages, missing tags and slow pages. Speed tools measure Core Web Vitals such as LCP, INP and CLS.
Compare at a glance
| Tool | Maker | Pricing | Best for |
|---|---|---|---|
| Ahrefs Webmaster Tools | Ahrefs | Free | Site owners on a budget |
| Chrome UX Report (CrUX) | Free | Real-user performance data | |
| DebugBear | DebugBear | Paid (free trial) | Performance monitoring |
| GTmetrix | GTmetrix | Freemium | Page speed diagnostics |
| JetOctopus | JetOctopus | Paid (free trial) | Log file analysis |
| Lighthouse | Free | Web developers | |
| Lumar | Lumar | Paid | Enterprise technical SEO |
| Netpeak Spider | Netpeak Software | Paid (free trial) | Desktop site crawling |
| Oncrawl | BrightEdge | Paid | Data-driven technical SEO |
| PageSpeed Insights | Free | Core Web Vitals checks | |
| Rich Results Test | Free | Structured data testing | |
| Schema Markup Validator | Schema.org | Free | Schema validation |
| Screaming Frog SEO Spider | Screaming Frog | Freemium | Technical audits |
| Seobility | Seobility | Freemium | Small business audits |
| Sitebulb | Sitebulb | Paid (free trial) | Agency technical audits |
| Sitechecker | Sitechecker | Paid (free trial) | Multi-site monitoring |
| WebPageTest | LogicMonitor | Freemium | Advanced performance testing |
All 17 tools in detail
Free
Chrome UX Report (CrUX)
Public dataset of real Chrome user experience metrics, available via API, BigQuery and CrUX Vis.
Best for: Real-user performance dataVisit Chrome UX Report (CrUX) (opens in new tab)
DebugBear
DebugBear
Monitors page speed and Core Web Vitals with scheduled lab tests and real-user data.
Best for: Performance monitoringVisit DebugBear (opens in new tab)
GTmetrix
GTmetrix
Tests page load speed from multiple locations with waterfall charts, Lighthouse data and monitoring.
Best for: Page speed diagnosticsVisit GTmetrix (opens in new tab)
JetOctopus
JetOctopus
Cloud crawler and log analyser showing how search and AI bots actually crawl large sites.
Best for: Log file analysisVisit JetOctopus (opens in new tab)
Lighthouse
Open-source auditing tool in Chrome DevTools scoring performance, accessibility, best practices and SEO.
Best for: Web developersVisit Lighthouse (opens in new tab)
Lumar
Lumar
Enterprise website crawler for technical SEO, accessibility and site-speed monitoring; formerly Deepcrawl.
Best for: Enterprise technical SEOVisit Lumar (opens in new tab)
Netpeak Spider
Netpeak Software
Desktop crawler for Windows and macOS that detects over 100 on-page and technical issues.
Best for: Desktop site crawlingVisit Netpeak Spider (opens in new tab)
Oncrawl
BrightEdge
Technical SEO platform combining crawl data with server logs and analytics for data-led decisions.
Best for: Data-driven technical SEOVisit Oncrawl (opens in new tab)
PageSpeed Insights
Reports Core Web Vitals field data and Lighthouse lab results with fixes for any public URL.
Best for: Core Web Vitals checksVisit PageSpeed Insights (opens in new tab)
Rich Results Test
Checks whether a page's structured data qualifies for Google rich results and flags errors.
Best for: Structured data testingVisit Rich Results Test (opens in new tab)
Schema Markup Validator
Schema.org
Validates any Schema.org markup in JSON-LD, Microdata or RDFa, independent of Google features.
Best for: Schema validationVisit Schema Markup Validator (opens in new tab)
Screaming Frog SEO Spider
Screaming Frog
Desktop crawler that audits sites for broken links, redirects, metadata and technical issues; free up to 500 URLs.
Best for: Technical auditsVisit Screaming Frog SEO Spider (opens in new tab)
Seobility
Seobility
Cloud-based site auditor with on-page checks, rank monitoring and backlink overview.
Best for: Small business auditsVisit Seobility (opens in new tab)
Sitebulb
Sitebulb
Desktop and cloud crawler that prioritises technical issues and explains them in visual, client-ready reports.
Best for: Agency technical auditsVisit Sitebulb (opens in new tab)
Sitechecker
Sitechecker
Monitors technical health, rankings and Search Console data across many sites in one dashboard.
Best for: Multi-site monitoringVisit Sitechecker (opens in new tab)
WebPageTest
LogicMonitor
Runs detailed page-load tests on real browsers and locations, with filmstrips and waterfall analysis.
Best for: Advanced performance testingVisit WebPageTest (opens in new tab)