Searchlab
All Tools
SEO Score Checker
Grade any page on 20+ on-page SEO checks and get a clear action list.
PageSpeed & Core Web Vitals
Real Lighthouse scores: LCP, INP, CLS, plus opportunities to improve.
Meta Tag Analyzer
Inspect titles, descriptions, OG and Twitter cards. Preview how Google sees you.
Keyword Density
Find the dominant words and phrases on any page in seconds.
Keyword Suggestions
Pull hundreds of long-tail keyword ideas straight from Google.
Broken Link Checker
Crawl any page and surface every 4xx / 5xx link before Google does.
Robots & Sitemap Inspector
Validate robots.txt, parse sitemaps, and catch indexing conflicts.
HTTP Headers & Redirects
See every hop in a redirect chain and audit security & cache headers.
SSL, DNS & WHOIS
Certificate details, full DNS records, and WHOIS in one report.
Domain Authority Checker
Check a domain's authority, world rank, age and security — or compare two head-to-head.
Online Code Compiler
Run code in 18 languages plus a live HTML/CSS/JS preview. No setup, no signup.
Use Cases
For Bloggers
Rank posts faster, fix SEO, find keywords.
For Agencies
Audit client sites in bulk, save the bills.
For Ecommerce
Product page audits, schema, performance.
For Freelancers
Quick site audits to win pitches.
Resources
SEO Blog
Fresh tactics that actually work.
SEO Guides
Step-by-step playbooks, no fluff.
Glossary
SEO terms decoded in plain English.
About Searchlab
Why we built this, what we believe.
Compiler
Contact
Run free audit
All Tools
SEO Score Checker
PageSpeed & Core Web Vitals
Meta Tag Analyzer
Keyword Density
Keyword Suggestions
Broken Link Checker
Robots & Sitemap Inspector
HTTP Headers & Redirects
SSL, DNS & WHOIS
Domain Authority Checker
Online Code Compiler
Use Cases
For Bloggers
For Agencies
For Ecommerce
For Freelancers
Resources
SEO Blog
Guides
Glossary
About
Online Code Compiler
Contact
Run free audit →
All compilers
R
R
Online Compiler
Run
Ctrl+↵
main.r
R · 4.1.1
Output
Idle
Stdin
Docs
Run your code to see output here.
Standard input — what your program reads from
stdin