The website health suite built for
clear, actionable truth.
Dedicated verification engines for your public website. Audit WCAG accessibility with ready-to-merge code fixes, measure AI search presence across major LLMs, and catch cross-page contradictions — without installing any software or code on your site, and with zero monthly subscription lock-in.
Dedicated Subdomain Audit Tools
Every engine lives on its own dedicated subdomain with isolated compute, zero cross-site dependencies, and standalone exportable reports.
Accessibility by OpenSiteCheck
Automated WCAG 2.2 Audits + AI-Generated Developer Fixes
Audit your website for WCAG 2.1/2.2 AA accessibility violations. Our headless Chromium engine scans your pages with axe-core, groups repeated issues, and synthesizes ready-to-merge before/after HTML code fixes that your developer can copy and paste.
AI Visibility by OpenSiteCheck
Generative AI Search Presence & Local LLM Discovery
Find out if ChatGPT (OpenAI), Google Gemini, and Perplexity recommend your business when prospective customers ask for local services. Interrogates models with target-blind buyer questions and provides dated transcripts with evidence-backed website fixes.
OpenSiteCheck Consistency
Cross-Page Contradiction & Expired Offer Detection
An automated engine that crawls your public pages and compares your website strictly against itself. Catches conflicting prices, outdated business hours, differing policy terms, and expired promotions with dual exact DOM quotations.
More dedicated audit engines are currently in development.
The OpenSiteCheck suite is designed as an expanding platform of standalone website tools. Future subdomains include performance.opensitecheck.com (Core Web Vitals), schema.opensitecheck.com (Rich Snippet & Entity Validator), and assets.opensitecheck.com (Broken Resource & Link Guard).
Evidence You Can Actually Use
No mysterious scores or vague percentages. Every OpenSiteCheck report delivers concrete proof, exact page snippets, and actionable code fixes.
Unlabeled Booking Button & Contrast Fault
axe-core flagged a critical checkout button lacking an accessible name for screen readers, with low contrast against the navigation bar.
Added explicit aria-label for screen readers, elevated contrast from 2.8:1 to compliant 5.2:1, and added a keyboard focus ring.
Built for Business Owners & Modern Web Teams
Everything you need to verify, fix, and improve your website without the complexity, recurring fees, or invasive scripts of traditional enterprise software.
Zero Monthly Subscription Traps
Website audits are milestone-driven: you run them when you launch, redesign, or update. Why pay $99/month forever? With OpenSiteCheck, run free checks or purchase single one-time reports. You own the results forever.
Direct Developer Handoffs
Generic audit tools give you an arbitrary 72/100 score and leave you guessing. OpenSiteCheck pinpoints the exact DOM selectors and synthesizes ready-to-merge before/after HTML fixes your developer can apply immediately.
Zero Site Scripts (No Plugins Needed)
Never install third-party tracking pixels, plugins, or JavaScript snippets that slow down your website. All audits run externally using headless Chromium workers against your public web pages.
Zero AI Hallucination Guarantee
AI is never used to guess whether an issue exists. Accessibility is validated deterministically with axe-core; visibility captures real dated LLM transcripts; consistency requires two exact verbatim page quotations.
Standalone, Portable Reports
Download self-contained offline HTML reports or branded PDFs that can be shared with clients, developers, or compliance advisors. No locked dashboards or proprietary viewer requirements.
Automated Data Ephemerality
We believe in clean data hygiene. All crawled pages, snapshots, and report evidence are scheduled for permanent background deletion after 30 to 90 days. We never sell data or use your pages for model training.
From Public URL to Actionable Code Fixes
Run comprehensive technical audits on any public website in minutes without complex setup.
Select Engine & Enter Your URL
Navigate to any dedicated OpenSiteCheck subdomain. Enter your website address. No software installation, browser extensions, or credit cards are needed to start.
Automated Evidence Extraction
Our headless Chromium workers crawl your public pages, run axe-core validation rules, interrogate AI search engines, or cross-check internal claim consistency.
Get Concrete Fixes & Standalone Reports
Review your evidence-backed report online, download permanent offline HTML/PDF artifacts, or copy ready-to-merge AI code patches straight to your web developer.
Side-by-Side Engine Comparison
Review the underlying mechanics, proof guarantees, deliverable formats, and pricing across all three engines.
| Capability / Specification | accessibility.opensitecheck.com | visibility.opensitecheck.com | consistency.opensitecheck.com |
|---|---|---|---|
| Primary Goal | WCAG 2.1/2.2 AA Conformance & Developer Code Fixes | Generative AI Search Presence & Brand Entity Discovery | Internal Content Contradiction & Expired Promo Audits |
| What is Inspected | Public DOM, ARIA tags, contrast ratios, keyboard flow | ChatGPT, Gemini, & Perplexity answers for buyer queries | Public canonical website copy compared against itself |
| Underlying Engine | Headless Chromium + axe-core 4.8 | Official OpenAI, Gemini, Perplexity APIs | Playwright Chromium + Claim Extractor |
| Role of AI | Synthesizes developer before/after HTML code patches | Formulates target-blind buyer questions & queries LLMs | Extracts semantic claims & contextual candidate groups |
| Proof Standard | Deterministic axe-core rules only | Verbatim dated raw answer captures | Dual-quote retained DOM snippet proof |
| Deliverable Outputs | Standalone offline HTML, Branded PDF, Email dispatch | Evidence Desk web report + Private Link access | Downloadable script-free HTML & Validated JSON |
| Data Retention | Automatic purge after 90 days | Strict 30-day artifact lifecycle | 30-day filesystem artifact purge |
| Pricing Model | Free / $15 Pro / $35 Full | Free Beta / $7.99 Full Report | Free Prototype / Depth Report |
| Live Subdomain | accessibility.opensitecheck.com | visibility.opensitecheck.com | consistency.opensitecheck.com |
Expanding the OpenSiteCheck Platform
We are continually building focused website verification engines under the OpenSiteCheck umbrella. Every future tool shares the same core philosophy: no subscriptions, no tracking scripts, and 100% verifiable evidence.
Performance & Core Web Vitals
Deep synthetic Chromium analysis of LCP, INP, and CLS bottlenecks with specific image compression and script execution optimization suggestions.
Rich Snippets & Entity Validator
Validates LocalBusiness, Product, Organization, and FAQ structured data against Google Rich Result standards with auto-generated JSON-LD patches.
Broken Link & Resource Guard
High-speed full-origin crawler that detects broken internal/external hyperlinks, 404 images, missing stylesheet fonts, and SSL mixed-content warnings.
Clear Answers for Business Owners & Teams
Everything you need to know about our scanning engines, evidence verification, and privacy policies.
//Why one-time reports instead of a recurring monthly subscription?
Website audits and code fixes are milestone-based: you audit when you launch, redesign, or release major content. We believe it is unfair to bill business owners $99 every month for tools they only use a few times a year. OpenSiteCheck offers generous free tiers and transparent, single-purchase reports.
//Do I need technical skills to understand the findings?
No. Every report is written in plain English for business owners, summarizing what is working, what is broken, and why it matters. For developers and technical teams, reports also provide exact DOM selectors, rule IDs, and copy-pasteable before/after code patches.
//Why are the tools hosted on separate subdomains?
Each engine has a specialized purpose, isolated worker infrastructure, and distinct runtime environment. Separating tools (e.g. accessibility.opensitecheck.com and visibility.opensitecheck.com) ensures fast load times, air-gapped security, and zero bloated monolithic dashboards.
//How does OpenSiteCheck prevent AI from making up false issues?
AI models never decide whether a bug exists. In Accessibility, axe-core deterministically detects violations, and AI is used only to draft code patches. In Visibility, raw verbatim responses from ChatGPT, Gemini, and Perplexity are captured with timestamps. In Consistency, two verbatim quotes are required before any contradiction is reported.
//Do I need to install any tracking scripts or plugins on my website?
Never. All OpenSiteCheck audits run externally using headless Chromium browsers and official AI provider APIs. No invasive analytics pixels, tracking cookies, plugins, or code changes are ever required on your website.
//What happens to my scanned data and reports?
We believe in clean data hygiene. All scanned pages, snapshots, and report evidence are automatically purged from our servers after 30 to 90 days. We never sell your data or use your website content to train AI models.