This page is designed to help you find out whether ARG Architect.software is good and if it is the right choice for you.
Arg Architect audits the website you choose and tells you what is wrong, why it matters, and how to fix it. Everything runs inside your browser: reports stay on your device and are never uploaded.
WHAT IT CHECKS - Security: security headers (CSP, HSTS, frame protection, referrer, and permissions policies), cookies, mixed content, exposed secrets, known-vulnerable client libraries, and disclosed server versions that are out of upstream support, grouped by the attack each defense stops. - Performance: Core Web Vitals and load timings measured over repeated controlled page loads, with the median of every run, and a slow LCP explained by its cause. - Architecture: third-party dependencies, API origins, redirect chains, script errors and failed requests during the load, and the detected technology stack. - Payload and efficiency: JavaScript, CSS, image and font weight, image formats and sizing, caching, compression, duplicate requests, and HTTP versions. - Accessibility and DOM: image alt text, form labels, heading structure, landmarks, duplicate ids, page size, and on a phone-sized window: layout fit, touch target size, and legible text size. - AI readiness: robots.txt rules judged by crawler role (letting AI search and citation crawlers in, keeping training and scraper crawlers out), sitemaps, llms.txt, structured data, and agent discovery, with llms.txt relevance judged by a built-in multilingual language model.
Every failing check explains the problem, names exactly what fails (the header, the file, the element, the library, and its advisories), and recommends a fix.Copy any finding as a ticket draft for your issue tracker.
Saved reports are grouped by day.Compare any two runs side by side, every score, check, and measurement, to track progress over time or between two versions of a site. Reports made with another version of Arg Architect are flagged before you compare them, because checks and scoring can differ. Export reports and comparisons as PDF, MD, or JSON.
Listed in
Supported browsers
Chrome, Microsoft Edge, Firefox (desktop, version 140 or later)
Platform
Manifest V3 browser extension
Audit areas
Security, Performance, Architecture, Payload and efficiency, Accessibility and DOM, AI readiness
Security checks
Security headers (CSP, HSTS, frame protection, referrer and permissions policies), cookies, mixed content, exposed secrets, vulnerable JavaScript libraries, server versions out of support
Performance
Core Web Vitals and load timings, median of repeated measured loads, slow LCP explained by its cause
Measurement modes
Quick (1 run), Standard (3 runs), Thorough (5 runs), each after a discarded warm-up load
Architecture
Third-party dependencies, API origins, redirect chains, script errors, failed requests, detected technology stack
Payload and efficiency
JavaScript, CSS, image and font weight, image formats and sizing, caching, compression, duplicate requests, HTTP versions
Accessibility and mobile
Alt text, form labels, headings, landmarks, duplicate ids, plus layout fit, touch target size and legible text size on a phone-sized window
AI readiness
robots.txt judged by crawler role (citation vs. training and scraper crawlers), sitemaps, llms.txt, structured data, agent discovery
Built-in AI
Multilingual language model running locally to judge llms.txt relevance; never downloaded at runtime
Vulnerability Database
Retire.js database bundled in the extension, updated with releases
Batch audits
Current tab, or a queue of up to 10 URLs
Isolated runs
Audits run in their own window; normal browsing is untouched
Cookie banners
Answered with reject or essential-only, never accept
Findings
Each failing check names exactly what fails and recommends a fix; copy any finding as a ticket draft
History
Up to 30 saved reports on your device, grouped by day
Comparison
Any two runs side by side (scores, checks, measurements), with a warning when they come from different extension versions
Export formats
PDF, Markdown, JSON (reports and comparisons)
Notifications
Bell notifications and desktop notifications when the queue finishes; update notices with a link to the changelog
Privacy
No account, no analytics, no tracking; reports stay on your device
Optional lookups
CDN detection and AI discovery via DNS, off by default (send only the hostname)
Permissions
storage, webRequest, scripting, notifications, access to all sites (to audit any URL); cookies optional, for Deep cookie inspection only
Language
English
Support
dev@arg.software
Privacy policy
https://arg.software/arg-architect/privacy/
Promote ARG Architect.software. You can add any of these badges on your website.
Most audit tools cover one area: Lighthouse for performance, security scanners for headers, SEO tools for crawlability. ARG Architect audits security, performance, architecture, payload, accessibility, and AI readiness in one report. Every failing check names exactly what fails (the header, the file, the element, the library, and its advisories) and says how to fix it.
It is also private by design. Everything runs inside the browser: no account, no analytics, no uploads. The language model and the vulnerability database ship inside the extension. Audits run in a separate window, measure each page several times and report the median, so results are stable rather than a single noisy run. It also answers questions most tools don't ask yet: whether AI search and citation crawlers can reach the site while training and scraper crawlers are kept out, whether llms.txt is relevant, and which server versions are out of support. Saved reports can be compared over time, and exported as PDF, Markdown, JSON or ready-to-paste tickets.
Web developers, tech leads, and software architects who need a fast, trustworthy technical review of a website: before a launch, after a release, when taking over a codebase, or when assessing a client's or competitor's site. It also suits agencies and consultants, who can send the exported reports to clients, and teams that care about privacy and cannot paste URLs into third-party scanners.
Choose ARG Architect when you want one complete, trustworthy technical review of a website without giving its data to anyone.
It is free and works in Chrome, Edge, and Firefox.
ARG Software is an architecture-first software engineering company in Portugal. We build production systems for fintech, SaaS and high-growth technology companies. Most of what we build is never seen from the outside: it lives in our clients' platforms, behind logins and contracts. We wanted to show how we work in a way anyone could try for themselves.
ARG Architect is that way. It audits any website's security, performance, architecture, accessibility, and AI readiness, the same things we look at in every system we build. We know it only scratches the surface: a browser extension can see what a website exposes, not how the system behind it was designed.
But it carries the same standards we hold ourselves to. It is private by design, so nothing leaves your device. Every result is measured several times, so it is reliable. Every finding says exactly what is wrong and how to fix it. The code behind it is held to the same quality checks we use on client work.
To us, ARG Architect is a small, practical expression of what the company stands for: dedication and commitment to building solid, secure products, for our customers and for ourselves. If this is how we approach a free tool, imagine what we bring to your product.
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