Free SEO Tools | SEO Lucas
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    SEO LucasDiagnostic ledger

    SEO Diagnostic Ledger / 28 tools

    Start with one URL. Build an SEO diagnostic record.

    Run nine checks for one URL, then investigate, generate and monitor by job.

    Primary scan

    Comprehensive SEO audit

    1 URL / 9 MODULES

    One coverage record · N/A, locked and quota-limited modules stay visible

    Choose by job

    What do you need to accomplish?

    Tools follow the workflow, not the jargon. Every card shows its input, typical time and account requirement.

    01 / Diagnose

    Find the problems that matter

    Build a useful baseline across site health, performance, mobile experience and accessibility.

    Comprehensive SEO Audit

    Run nine URL checks covering technical SEO, performance, mobile, accessibility, content and AEO

    Input
    URL
    Time
    3–8 min
    Account
    Not required

    SEO Analyzer

    Get an SEO score and actionable issues for any URL

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    SEO Best Practices

    Check a page against an SEO best-practices checklist

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Web Vitals Checker

    Measure Core Web Vitals: LCP, CLS, INP and more

    Input
    URL
    Time
    1–2 min
    Account
    Not required

    Mobile Friendliness

    Check how mobile-friendly a page is

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Accessibility Audit

    Audit a page for accessibility (a11y) issues

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Headers Analyzer

    Analyze HTTP response headers and security settings

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    SSR/CSR Detector

    Detect whether a page is server- or client-rendered

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Image Optimizer

    Check image sizes, formats and alt attributes

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    02 / Crawl & index

    Make sure engines can find it

    Resolve conflicts across robots, canonicals, redirects, structured data and international signals.

    Indexability Checker

    Check whether a page can be indexed by search engines

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Canonical Checker

    Check canonical tag configuration

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Redirect Checker

    Trace redirect chains and HTTP status codes

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    hreflang Checker

    Validate hreflang tags on existing pages

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    Schema Validator

    Validate JSON-LD structured data on a page

    Input
    JSON-LD
    Time
    Instant
    Account
    Not required

    AI Crawler Tracker

    Check how open a site is to AI crawlers like GPTBot

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    03 / Build & publish

    Create correct SEO assets

    Generate metadata, structured data, sitemaps and pre-publish article requirements.

    Meta Tags Generator

    Generate title, description and social sharing tags

    Input
    Page data
    Time
    Instant
    Account
    Not required

    OG Preview

    Preview how a link looks when shared on social platforms

    Input
    Form
    Time
    Instant
    Account
    Not required

    Schema Generator

    Generate JSON-LD structured data markup

    Input
    Data form
    Time
    Instant
    Account
    Not required

    robots.txt Generator

    Create a robots.txt to control search engine crawling

    Input
    Rules
    Time
    Instant
    Account
    Not required

    Sitemap Generator

    Generate an XML sitemap for search engines

    Input
    URL list
    Time
    Instant
    Account
    Not required

    hreflang Generator

    Generate hreflang tags for multilingual sites

    Input
    Locale URLs
    Time
    Instant
    Account
    Not required

    Article Checker

    Check an article's SEO, AEO and readability

    Input
    Article text
    Time
    Instant
    Account
    Not required

    04 / Improve & monitor

    Turn findings into a routine

    Compare versions, record changes and improve readability for search and answer engines.

    Readability Analyzer

    Analyze content readability and structure

    Input
    Article text
    Time
    About 1 min
    Account
    Not required

    Keyword Density

    Calculate keyword density and distribution

    Input
    Article text
    Time
    About 1 min
    Account
    Not required

    AEO Score

    Score how answer-engine-friendly a page is

    Input
    URL
    Time
    About 1 min
    Account
    Not required

    SEO Changelog

    Track SEO element changes against a saved baseline

    Input
    Two versions
    Time
    About 1 min
    Account
    Not required

    Page Compare

    Compare SEO elements across multiple pages side by side

    Input
    2–3 URLs
    Time
    About 2 min
    Account
    Not required

    Pre-deploy Check

    Pre-launch SEO checklist scan

    Input
    Checklist
    Time
    About 1 min
    Account
    Not required