Free Technical Audit & AI Readiness Tools
Free browser tools for search, security, accessibility, and AI-generated answers. The single-page Technical Audit needs no signup.
Technical Audit
Instant SEO, performance, security, and AI Readiness analysis of any URL. Get an AI Readiness Score with prioritized recommendations.
GEO Checker
Check whether your site is structured to be discovered and cited in AI-generated answers.
AEO Checker
Audit the technical and content signals that help answer engines understand and cite your site.
AI Brand Checker
See how your brand appears in AI answers and uncover the competitors surfaced beside it.
AI Crawler Access Checker
Compare robots.txt policy with real live requests for 28 AI crawlers, grouped by training, indexing, and user-requested purpose.
AI Robots.txt Generator
Generate a robots.txt optimized for AI crawlers including ChatGPT, Claude, Perplexity, and Gemini. Control which AI bots access your content.
JSON-LD Schema Generator
Create structured data markup for 9 schema types. Boost rich search results and AI citation readiness.
Content AI Readiness Optimizer
Paste your content and get an instant AI Readiness score. 10 checks for AI citation optimization with actionable fixes.
Meta Tag Analyzer
Preview how your page appears in Google search, social media, and AI citations. Check title, description, and Open Graph tags.
Site Comparison
Compare two websites side by side. See SEO, AI Readiness, performance, security, and accessibility scores for both at once.
Heading Analyzer
Check your page's H1-H6 heading hierarchy for SEO issues. Find missing H1s, skipped levels, and structure problems.
Broken Link Checker
Find dead links (404), redirects, and connection errors on any page. Keep your site healthy for SEO and user experience.
Keyword Density Checker
Analyze keyword frequency and density in your content. Find single words, 2-word and 3-word phrases with density percentages.
HTTP Headers Checker
Inspect all HTTP response headers. Check security headers (HSTS, CSP, X-Frame-Options), caching, and server info with a security grade.
Redirect Checker
Trace the full redirect path of any URL. Find redirect chains, loops, 302s, and HTTP-to-HTTPS issues that hurt SEO.
Page Speed Checker
Test your website's performance with Google PageSpeed Insights. Get Core Web Vitals scores (LCP, INP, CLS) and optimization opportunities.
SSL/TLS Checker
Check any website's SSL certificate validity, TLS version, cipher strength, and expiration. Get an instant security grade from A+ to F.
WHOIS Domain Lookup
Look up domain registration details including registrar, creation date, expiry, nameservers, DNSSEC status, and domain age.
DNS Record Checker
Look up DNS records for any domain: A, AAAA, CNAME, MX, TXT, NS, SOA, and CAA. Check email authentication.
Technology Checker
Detect what technologies any website uses: CMS, frameworks, analytics, CDN, hosting, and payments.
Uptime Checker
Check if any website is up or down right now. Test HTTPS, response time, DNS, redirects, robots.txt, and sitemap availability.
Accessibility Checker
Check any website for WCAG accessibility issues. 15 automated checks for headings, alt text, ARIA landmarks, form labels, and more.
Color Contrast Checker
Check if your text colors meet WCAG 2.1 contrast requirements. Test AA and AAA compliance for normal text, large text, and UI components.
Carbon Calculator
Calculate the carbon footprint of any web page. See CO2 per visit, annual emissions, page weight breakdown, and tips to reduce environmental impact.
Robots.txt Tester
Analyze any website's robots.txt file. See which crawlers are allowed or blocked, check AI bot access (GPTBot, ClaudeBot), and find SEO issues.
Password Strength Checker
Test how strong your password is. Get entropy analysis, crack time estimates, pattern detection, and tips. Nothing is sent to servers.
XML Sitemap Validator
Validate your sitemap.xml for errors. Check URL count, lastmod format, namespace, structure issues, and sitemap index support.
Structured Data Tester
Validate JSON-LD schema markup on any URL. Check for required fields, schema types, and AI citation readiness. Supports 12+ schema types.
Open Graph Debugger
Debug and preview your Open Graph meta tags. See how your URL looks when shared on Facebook, Twitter, LinkedIn, Discord, and Slack.
Favicon Checker
Check if your website has proper favicon files. Test favicon.ico, apple-touch-icon, PNG variants, and web manifest in one pass.
Word Counter
Count words, characters, sentences, and paragraphs. Get reading time, readability score, and SEO recommendations for your content.
JSON Formatter
Format, validate, and minify JSON data. Pretty-print with custom indentation. See key counts, nesting depth, and syntax errors.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings. Supports UTF-8, Unicode, and special characters.
URL Encoder / Decoder
Encode or decode URLs and query parameters. Handles special characters, Unicode, and percent-encoding.
Lorem Ipsum Generator
Generate placeholder text for designs and mockups. Choose paragraphs, sentences, or words.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes from text. Instant, client-side, no data sent to servers.
Regex Tester
Test regular expressions with real-time match highlighting. Support for flags, capture groups, and common pattern presets.
Color Picker
Pick colors and convert between HEX, RGB, HSL, HWB. Generate shades, tints, and color harmonies. Check WCAG contrast ratios.
Markdown Preview
Write and preview Markdown in real time with a split-pane editor. Copy as HTML. Perfect for README files, blog posts, and documentation.
CSS Minifier & Beautifier
Minify CSS to reduce file size and improve page speed, or beautify compressed CSS for readability. Shows byte savings percentage.
JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, claims, and expiration status. Tokens never leave your browser.
HTML Minifier & Beautifier
Minify HTML to reduce page size and improve load time. Remove comments, whitespace, and redundant attributes. Or beautify minified HTML.
Cron Expression Parser
Parse cron expressions into human-readable descriptions. See field breakdowns, use presets, and understand scheduling syntax.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live current time, relative time calculation, ISO 8601 formatting.
Text Diff Checker
Compare two blocks of text and see additions, removals, and unchanged lines highlighted. LCS-based diff algorithm.
QR Code Generator
Generate QR codes for URLs, text, WiFi, email, phone, and SMS. Customize colors, download as PNG or SVG.
UUID Generator
Generate UUID v4 (random) or UUID v7 (time-sorted) identifiers. Bulk generate up to 100 at once with multiple formats.
URL Slug Generator
Convert text to URL-friendly slugs. Custom separators, max length, bulk conversion. Perfect for blog URLs and SEO.
AI Readiness Badge
Embed your AI Readiness badge on your website. Show visitors your AI search readiness with a dynamic SVG badge.
Public REST API
Automate Technical Audit and AI Readiness checks in apps, CI/CD pipelines, or AI assistants. Developer access begins on Launch.
Frequently asked questions
Choose the right free tool, then move into monitoring or developer automation when you need repeatable evidence.
Which free website tool should I use first?
Start with the Foglift Technical Audit. It checks one public URL across SEO, AI Readiness, performance, security, and accessibility, then turns the findings into prioritized recommendations. Use the focused tools when you need to inspect one issue such as schema, headings, redirects, or crawler access.
What do the AI Readiness tools check?
The AI Readiness tools inspect structured data, heading clarity, FAQ quality, entity identity, content depth, citation-friendly formatting, topical authority, and AI crawler access. The crawler checker separately compares robots.txt policy with live requests from 28 recognized AI crawlers.
Do I need an account to run a Technical Audit?
No. The public single-page Technical Audit is free, unlimited, and does not require signup. Full-site audits begin on Launch, select up to 100 pages per run, and preserve completed findings in Technical History.
Can developers automate Foglift checks?
Yes. Launch and higher plans include the REST API, CLI, MCP, webhooks, and batch scanning. Launch starts at $49 per month, includes 50 API requests per day and 1,000 per month, and adds daily monitoring across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overview.
Need a comprehensive Technical Audit?
Our free Technical Audit checks SEO, performance, security, accessibility, and AI Readiness in one report.
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