Toolumen

Developers juggle a dozen scattered sites for SEO audits, Open Graph previews, schema, accessibility, performance, and security checks. Stacklumen wanted one focused catalog — not a junk drawer — where each tool does one job well, in the browser.

Stacklumen built Toolumen: nine browser-first tools spanning SEO & AEO, accessibility, performance, security, and Webflow, most running entirely client-side with no uploads or telemetry, on a freemium model.

Toolumen is live in beta and updated weekly — a fast, private, single-purpose toolkit developers reach for without installing anything.

Full product design and build: nine browser-first developer tools across SEO/AEO, accessibility, performance, security, and Webflow, plus the marketing site and freemium billing.