Learn more about our URL change·What do you think?
Toolumen · now its own product

The web tools we build,
now live at toolumen.com.

Toolumen is Stacklumen's web-tools product — SEO + AEO auditing, Open Graph previewing, contrast checking, Webflow embed sizing, HEIC conversion, and more. The full suite now runs at toolumen.com/app, free with a Stacklumen account. Browse what's live below.

Visit toolumen.com →5 tools live · more shipping
01 / SEO + AEO
Live

SEO + AEO Audit

Audit any URL in 5 seconds

Paste a URL. Get a graded report on title, meta, canonical, OG, JSON-LD, h1, robots, sitemap, and llms.txt.

Learn more →
Live

Open Graph Preview

See your link before you ship it

Render any URL the way Slack, iMessage, Twitter, LinkedIn, Discord, and Google would.

Learn more →
Coming Soon

robots.txt + llms.txt

Crawler files, generated

Pre-wired with GPTBot / ClaudeBot / PerplexityBot / Google-Extended allow rules.

Get notified →
02 / Content + Schema
Coming Soon

JSON-LD Generator

Schema.org without the docs

Form-driven generator for Organization, FAQPage, Product, Article, BreadcrumbList and more.

Get notified →
03 / Accessibility
Live

Contrast Checker

WCAG AA + AAA in two colors

Paste a foreground + background. Get ratio, pass status, and a one-click brand-safe suggestion.

Learn more →
04 / Webflow
Live

Webflow Embed Sizer

Will it fit the cap?

Paste an embed → minified HTML/CSS/JS, real character + KB size, gzipped size, and whether it fits inside Webflow's embed cap.

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05 / Performance
Coming Soon

Lighthouse Score

PSI scorecard for any URL

Proxies Google PageSpeed Insights — returns performance / accessibility / best-practices / SEO scores.

Get notified →
06 / Images
Live

HEIC Converter

iPhone HEIC → JPG, PNG, or WebP

Drag-drop HEIC files and convert in your browser to JPG, PNG, or WebP — batch, zip download, no upload. Files never leave the page.

Learn more →