About Vitals Audit – Free Website Auditing Toolkit | Vitals Audit

About This Project

Built for people who ship web pages

Vitals Audit bundles 48 essential performance, SEO, indexing, and security tools into one fast, free, no-signup dashboard.

Why Vitals Audit Exists

Shipping a web application or site that performs exceptionally requires checking multiple dimensions before release: Core Web Vitals performance, structured JSON-LD schema validity, Google search indexability, AMP markup cleanliness, meta header tags, transport layer protocol support, image payloads, and social media share previews.

Rather than jumping across dozens of disjointed tools, Vitals Audit consolidates 48 developer-grade utilities into a single, cohesive dashboard with instant execution and clean visual reporting.

At a Glance

100% Free, zero account or sign-up required
Live URL audits & client-side browser processing
Export raw JSON data anytime
48 tools in one dashboard

SEO & Audit Tools

Run server-side audits — live Core Web Vitals, indexability, TLS handshake, or DNS query against the target domain.

20 tools

Lighthouse Viewer

Run a live Lighthouse audit or upload a report to explore performance, accessibility, SEO and best-practice scores with real Core Web Vitals.

Schema Validator

Check a page's JSON-LD structured data for validity and preview rich snippets exactly as search engines parse them.

AMP Validator

Paste AMP markup or point at a live AMP page to catch validation errors and mobile format warnings before Google does.

SEO Analyzer

Audit a page's meta tags, headings, images, links, and OpenGraph social markup in one comprehensive scannable dashboard.

Google Index Checker

Check single or bulk URLs to verify search indexability, meta noindex tags, X-Robots headers, and robots.txt disallow status.

XML Sitemap Inspector

Parse and validate sitemap.xml files to extract listed URLs, lastmod dates, change frequencies, and XML health.

Keyword Density Checker

Analyze word count, n-gram phrase frequency distribution, and targeted keyword placement across title, headers, meta tags, and body content.

Long-Tail Keyword Generator

Expand seed keywords into high-intent long-tail phrases categorized by search intent, estimated difficulty score, and CPC.

Bulk Google Index Checker

Paste up to 50 URLs/domains to verify index status, HTTP response status, SSL certificate, and latency in a single batch report.

Spam Score Checker

Audit domain spam risk percentage, toxic link patterns, missing trust signals, and outbound link ratios to protect search engine rankings.

Domain Age Checker

Check domain creation date, total age in years/months/days, WHOIS expiry date, and registrar details for any domain.

SSL Certificate Checker

Inspect a site's SSL/TLS certificate — issuer, expiry date, and trust chain — via a real TLS handshake.

Redirect Checker

Follow a URL through every redirect hop and see each status code, destination, and any loops or downgrades.

DNS Lookup

Look up A, AAAA, MX, TXT, CNAME, NS and SOA DNS records for any domain.

Security Headers Checker

Check whether a site sends the HTTP response headers that protect against XSS, clickjacking and MIME-sniffing.

Technology Lookup

Find out what CMS, JavaScript framework, analytics, CDN and other technologies a website uses.

Share Debugger

See exactly how a URL will look when shared on Facebook, X (Twitter) or LinkedIn.

HTTP/3 Checker

Check whether a site advertises HTTP/3 support via the Alt-Svc header, ALPN negotiation and DNS HTTPS records.

Content Security Policy (CSP) Studio

Build, customize, and audit Content-Security-Policy (CSP) headers with real-time security evaluation and Nginx/Apache export.

HTTP Status Codes & SEO Guide

A complete searchable reference for all HTTP/1.1 and HTTP/2 response codes and their real-world search indexing impacts.

Client-Side Utilities

Run 100% locally inside your browser — zero files or code ever uploaded to a server.

28 tools

Robots.txt Generator

Generate valid robots.txt files with custom crawler directives, sitemap links, and AI bot blocking presets (GPTBot, ClaudeBot).

SERP Snippet Simulator

Preview how your page title and meta description appear on Google Search Desktop & Mobile results with live pixel meters.

Image Compressor

Compress, resize and convert images to JPEG, PNG or WebP — entirely in your browser, files never uploaded.

Favicon Generator

Generate every favicon size a site needs — 16×16 through 512×512 — from one image, entirely in your browser.

URL to Domain Extractor

Parse messy text or log files containing hundreds of URLs into clean, deduplicated root domain lists with 1-click export.

CSS & JS Minifier

Minify CSS or JavaScript in your browser — paste code, get a smaller output, nothing uploaded.

Color Contrast Checker

Check whether a text and background color pair meets WCAG AA/AAA contrast requirements.

JSON Viewer

Explore JSON as a collapsible, syntax-highlighted tree — validated as you go, entirely in your browser.

JSON Compare

Compare two JSON blobs and see exactly what was added, removed, or changed.

GitHub README Generator & Markdown Viewer

Build professional GitHub README.md files visually or preview, edit, and inspect markdown with live formatting.

JWT Token Debugger & Inspector

Decode, inspect, and validate JSON Web Tokens (JWT) with real-time claim countdowns and token structure breakdown.

Meta Tag & OpenGraph Studio

Generate search-optimized HTML meta tags, Facebook OpenGraph, and Twitter Cards with real-time live visual previews.

URL Encoder & Query Param Studio

Encode/decode URLs, percent-encoded parameters, and Base64 strings — or visually edit query strings and UTM tags in an interactive table.

HTML Formatter & Beautifier Studio

Clean, indent, and format messy HTML markup or compress code into production-ready minified HTML with real-time live preview.

Responsive Viewport & Device Simulator

Test any website across real device dimensions (iPhone, Galaxy, iPad, MacBook, Desktop) with rotation and multi-device grid testing.

SVG Optimizer & Viewer Studio

Minify SVG code, strip editor metadata from Figma/Illustrator, round precision coordinates, and preview vector graphics.

Cron Expression Visualizer & Generator

Generate, debug, and translate cron schedules into plain English with real-time execution timestamps and code snippets.

Live Regex Tester & Debugger

Test, debug, and validate regular expressions in real-time with capture groups breakdown, flag toggles, and multi-language snippets.

UUID, ULID & Hash Generator

Generate cryptographically secure UUIDs (v4/v1), sortable ULIDs, compact NanoIDs, and SHA hashes in bulk.

Markdown & HTML Converter Studio

Dual-direction conversion between GitHub Flavored Markdown (GFM) and HTML with live split-screen preview.

CSS Box Shadow & Glassmorphism Studio

Design multi-layered smooth box shadows, ambient glows, and modern glassmorphism backdrop filters with CSS export.

Case Converter & Text Statistics Studio

Convert text between standard headline Title Case, developer casing formats (camelCase, snake_case, kebab-case), and word counts.

QR Code Generator & Studio

Generate customized scannable QR codes for websites, WiFi networks, vCards, and plain text with 100% client privacy.

Text & Code Diff Checker

Compare two text documents or code files side-by-side with visual addition/deletion highlights and line inspection.

CSV to JSON & JSON to CSV Studio

Convert spreadsheet CSV data into clean JSON arrays or export structured JSON records back to tabular CSV files.

SQL Formatter & Query Beautifier

Clean, indent, and format messy SQL queries across MySQL, PostgreSQL, SQLite, and BigQuery with keyword capitalization.

Base64 Image & File Studio

Convert images, fonts, and assets into Base64 Data URIs for inline HTML/CSS embedding or decode Base64 strings back into files.

Lorem Ipsum & Mock Data Studio

Generate customizable placeholder copy, HTML-formatted lists, and mock user JSON records for UI prototyping.