devaraj3 · devaraj3 · Aug 23, 2026 · Aug 23, 2026
diff --git a/index.html b/index.html
@@ -28,7 +28,7 @@
         "@context": "https://schema.org",
         "@type": "SoftwareApplication",
         "name": "CAD Viewer",
-        "description": "Open STEP, IGES, STL, OBJ, and more CAD formats instantly in your browser. Orbit, measure edges, apply section planes, and export snapshots — no install required.",
+        "description": "Open STEP, IGES, STL, OBJ, and more CAD formats instantly in your browser, then generate a fully dimensioned, true-to-scale 2D engineering drawing — no install required.",
         "url": "https://cadviewer.xyz/",
         "applicationCategory": "DesignApplication",
         "operatingSystem": "Web",
@@ -39,10 +39,11 @@
         },
         "featureList": [
           "3D viewing for CAD and mesh formats",
+          "Automatic 2D engineering drawing generation with true-to-scale PDF export",
+          "Assembly explode and disassemble with per-part STEP export",
           "Measurement tools",
           "Section/cross-section controls",
           "Snapshot capture (normal and outline)",
-          "Assembly/part-focused workflows",
           "DXF preview support"
         ]
       }
@@ -56,6 +57,23 @@
         "url": "https://cadviewer.xyz/"
       }
     </script>
+    <script type="application/ld+json">
+      {
+        "@context": "https://schema.org",
+        "@type": "Organization",
+        "name": "CADViewer",
+        "url": "https://cadviewer.xyz/",
+        "logo": "https://cadviewer.xyz/favicon.svg",
+        "founder": {
+          "@type": "Person",
+          "name": "Devaraj"
+        },
+        "sameAs": [
+          "https://github.com/devaraj3/cad_viewer",
+          "https://www.linkedin.com/in/devaraj1/"
+        ]
+      }
+    </script>
     <style>
       html, body, #root { height: 100%; }
       body { margin: 0; overflow: hidden; }

diff --git a/public/llms.txt b/public/llms.txt
@@ -1,27 +1,37 @@
 # CAD Viewer
 
-> Free, browser-based 3D CAD viewer supporting STEP, IGES, STL, OBJ, 3MF, BREP, GLB, and DXF files — no install, no account, no subscription.
+> Free, browser-based 3D CAD viewer and 2D engineering drawing generator
+> supporting STEP, IGES, STL, OBJ, 3MF, BREP, GLB, and DXF files — no
+> install, no account, no subscription.
 
-CAD Viewer is an open-source, in-browser CAD file viewer built on the OpenCascade (OCCT) engine. It runs entirely client-side and requires no software installation or account signup.
+CAD Viewer is an open-source, in-browser CAD file viewer built on the
+OpenCascade (OCCT) engine. It runs entirely client-side and requires no
+software installation or account signup.
 
 ## Features
 - 3D viewing for CAD and mesh formats
+- Automatic 2D engineering drawing generation with true-to-scale PDF export
+  (third-angle projection, standard dimensioning)
+- Assembly explode/disassemble with per-part STEP export
 - Measurement tools
 - Section/cross-section controls
 - Snapshot capture (normal and outline)
-- Assembly/part-focused workflows
 - DXF preview support
 
 ## Supported formats
 - CAD solids: STEP, STP, IGES, IGS, BREP
 - Mesh/assembly formats: STL, OBJ, 3MF, GLTF, GLB
-- 2D drawing format: DXF
+- 2D drawing format: DXF (import), PDF (drawing export)
 
 ## Pricing
 Free to use, no subscription required.
 
 ## Guides
 - [How to Split a STEP Assembly Into Separate Part Files (Free, Online)](https://cadviewer.xyz/guides/split-step-assembly)
+- [How to Turn a STEP File into a 2D Engineering Drawing (Free)](https://cadviewer.xyz/guides/step-file-to-2d-drawing)
+
+## About
+[About CADViewer](https://cadviewer.xyz/about)
 
 ## Live app
 [CAD Viewer](https://cadviewer.xyz/)
diff --git a/public/sitemap.xml b/public/sitemap.xml
@@ -2,25 +2,31 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://cadviewer.xyz/</loc>
-    <lastmod>2026-08-22</lastmod>
+    <lastmod>2026-08-23</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1</priority>
   </url>
+  <url>
+    <loc>https://cadviewer.xyz/about</loc>
+    <lastmod>2026-08-23</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.6</priority>
+  </url>
   <url>
     <loc>https://cadviewer.xyz/viewer</loc>
-    <lastmod>2026-08-22</lastmod>
+    <lastmod>2026-08-23</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://cadviewer.xyz/guides/split-step-assembly</loc>
-    <lastmod>2026-08-22</lastmod>
+    <lastmod>2026-08-23</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.9</priority>
   </url>
   <url>
     <loc>https://cadviewer.xyz/guides/step-file-to-2d-drawing</loc>
-    <lastmod>2026-08-22</lastmod>
+    <lastmod>2026-08-23</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.9</priority>
   </url>

diff --git a/src/main.tsx b/src/main.tsx
@@ -1,6 +1,7 @@
 import { lazy, Suspense } from "react";
 import { ClientOnly, Head, ViteReactSSG } from "vite-react-ssg";
 import type { RouteRecord } from "vite-react-ssg";
+import About from "./pages/About";
 import Landing from "./pages/Landing";
 import SplitStepAssembly from "./pages/guides/SplitStepAssembly";
 import StepFileTo2dDrawing from "./pages/guides/StepFileTo2dDrawing";
@@ -50,6 +51,7 @@ function NotFound() {
 
 export const routes: RouteRecord[] = [
   { path: "/", element: <Landing /> },
+  { path: "/about", Component: About },
   { path: "/guides/split-step-assembly", Component: SplitStepAssembly },
   {
     path: "/guides/step-file-to-2d-drawing",

diff --git a/src/pages/About.module.css b/src/pages/About.module.css
@@ -0,0 +1,126 @@
+:global(body.about-page) {
+  overflow-y: auto;
+  height: auto;
+  min-height: 100vh;
+}
+
+:global(body.about-page #root) {
+  height: auto;
+  min-height: 100vh;
+}
+
+.page {
+  min-height: 100vh;
+  background: #fafafa;
+  color: #1a1a1a;
+  display: flex;
+  justify-content: center;
+  padding: 4rem 1.5rem 6rem;
+}
+
+.article {
+  width: min(720px, 100%);
+  display: flex;
+  flex-direction: column;
+  gap: clamp(3rem, 5vw, 4rem);
+}
+
+.section {
+  display: flex;
+  flex-direction: column;
+  gap: 1.25rem;
+}
+
+.breadcrumb {
+  display: inline-flex;
+  align-self: flex-start;
+  color: #4b5563;
+  font-size: 0.9rem;
+  text-decoration: none;
+}
+
+.breadcrumb:hover {
+  color: #3b82f6;
+}
+
+.eyebrow {
+  margin: 0;
+  color: #6b7280;
+  font-family:
+    "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono",
+    "Courier New", monospace;
+  font-size: 0.75rem;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+}
+
+.headline {
+  margin: 0.5rem 0 0;
+  color: #1a1a1a;
+  font-size: 2.25rem;
+  line-height: 1.2;
+  font-weight: 700;
+}
+
+.sectionHeading {
+  margin: 0;
+  color: #1a1a1a;
+  font-size: 1.5rem;
+  font-weight: 700;
+}
+
+.paragraph {
+  margin: 0;
+  color: #4b5563;
+  font-size: 1.05rem;
+  line-height: 1.7;
+}
+
+.externalLink {
+  color: #2563eb;
+  text-decoration: underline;
+  text-underline-offset: 2px;
+}
+
+.externalLink:hover {
+  color: #1d4ed8;
+}
+
+.ctaRow {
+  margin-top: 0.25rem;
+}
+
+.cta {
+  display: inline-block;
+  background: #3b82f6;
+  color: #ffffff;
+  border: none;
+  border-radius: 8px;
+  padding: 0.85rem 2.25rem;
+  font-size: 1rem;
+  font-weight: 600;
+  text-decoration: none;
+  box-shadow: 0 8px 24px -8px rgba(59, 130, 246, 0.45);
+  transition:
+    background 0.15s ease,
+    transform 0.15s ease;
+}
+
+.cta:hover {
+  background: #2563eb;
+  transform: translateY(-1px);
+}
+
+@media (max-width: 768px) {
+  .page {
+    padding: 2.5rem 1.25rem 4rem;
+  }
+
+  .article {
+    gap: clamp(2.25rem, 8vw, 3rem);
+  }
+
+  .headline {
+    font-size: 1.75rem;
+  }
+}
diff --git a/src/pages/About.tsx b/src/pages/About.tsx
@@ -0,0 +1,128 @@
+import { Link } from "react-router-dom";
+import { Head } from "vite-react-ssg";
+import styles from "./About.module.css";
+
+export default function About() {
+  return (
+    <>
+      <Head>
+        <title>About CADViewer</title>
+        <meta
+          name="description"
+          content="Why CADViewer exists, how it works, and who's building it."
+        />
+        <link rel="canonical" href="https://cadviewer.xyz/about" />
+        <meta property="og:title" content="About CADViewer" />
+        <meta
+          property="og:description"
+          content="Why CADViewer exists, how it works, and who's building it."
+        />
+        <meta property="og:url" content="https://cadviewer.xyz/about" />
+        <meta property="og:type" content="website" />
+        <meta name="twitter:title" content="About CADViewer" />
+        <meta
+          name="twitter:description"
+          content="Why CADViewer exists, how it works, and who's building it."
+        />
+        <body className="about-page" />
+      </Head>
+      <main className={styles.page}>
+        <article className={styles.article}>
+          <section className={styles.section}>
+            <Link to="/" className={styles.breadcrumb}>
+              ← Back to CAD Viewer
+            </Link>
+            <p className={styles.eyebrow}>About</p>
+            <h1 className={styles.headline}>About CADViewer</h1>
+          </section>
+
+          <section className={styles.section}>
+            <h2 className={styles.sectionHeading}>Why this exists</h2>
+            <p className={styles.paragraph}>
+              Viewing a CAD file usually means installing something —
+              SolidWorks, Fusion 360, or at minimum a dedicated viewer app.
+              If you just need to look at a STEP file someone sent you, or
+              turn a 3D model into a drawing you can hand to a machine shop,
+              that's a lot of friction for an occasional task.
+            </p>
+            <p className={styles.paragraph}>
+              CADViewer is built to remove that friction: open the file in a
+              browser tab, view it, measure it, and generate a real
+              engineering drawing from it — no install, no account, no cost.
+            </p>
+          </section>
+
+          <section className={styles.section}>
+            <h2 className={styles.sectionHeading}>How it works</h2>
+            <p className={styles.paragraph}>
+              The viewer runs on OpenCascade (OCCT), the open-source CAD
+              kernel, compiled to WebAssembly so it runs directly in your
+              browser. Your file is never uploaded to a server — everything
+              from geometry parsing to drawing generation happens on your
+              own machine.
+            </p>
+            <p className={styles.paragraph}>
+              The 2D drawing generator specifically follows standard
+              drafting convention — third-angle projection, proper
+              dimension placement, correct scale selection — rather than
+              just capturing a picture of the model from three angles.
+              Getting that right took real iteration; a drawing that looks
+              plausible but is missing a dimension or duplicates one isn't
+              actually useful to whoever has to build the part from it.
+            </p>
+          </section>
+
+          <section className={styles.section}>
+            <h2 className={styles.sectionHeading}>Who's building this</h2>
+            <p className={styles.paragraph}>
+              CADViewer is built and maintained by Devaraj, working solo.
+              The project started from a simple frustration: needing to
+              open and document CAD files without paying for a SolidWorks
+              or Fusion 360 seat.
+            </p>
+            <p className={styles.paragraph}>
+              Most of the implementation has been built through iterative,
+              AI-assisted development — but every drafting decision, every
+              dimensioning rule, and every generated drawing has been
+              checked by hand against real drafting standards and tested on
+              real parts before shipping. The goal was never just "does it
+              run," it was "would this hold up if someone actually built
+              the part from it."
+            </p>
+          </section>
+
+          <section className={styles.section}>
+            <h2 className={styles.sectionHeading}>What's next</h2>
+            <p className={styles.paragraph}>
+              Sheet-metal unfold and flattening, exploded assembly views,
+              and BOM tables are next on the list. And more unexpected
+              features to come.
+            </p>
+          </section>
+
+          <section className={styles.section}>
+            <h2 className={styles.sectionHeading}>Get in touch</h2>
+            <p className={styles.paragraph}>
+              Found a bug, or need a format that isn't supported yet?{" "}
+              <a
+                href="mailto:devarajhello@gmail.com"
+                className={styles.externalLink}
+              >
+                Get in touch
+              </a>
+              .
+            </p>
+          </section>
+
+          <section className={styles.section}>
+            <div className={styles.ctaRow}>
+              <a className={styles.cta} href="/viewer">
+                Try CADViewer now
+              </a>
+            </div>
+          </section>
+        </article>
+      </main>
+    </>
+  );
+}