Digital products for the web
I'm Marvin Beckmann. I build and operate small, focused software products that run in the browser. Each solves one concrete problem, works instantly and is delivered digitally.
Products
Converts PDF invoices into the German e-invoice formats XRechnung and ZUGFeRD, checked against the official KoSIT rules. Includes a free validator.
Price: €2.99 per invoice or €9 per month (unlimited) Paid plans launching soon.
erechnung-konverter.vercel.app →Generates and validates llms.txt files for websites and AGENTS.md files for GitHub repositories. Pro keeps the file up to date automatically.
Price: Free; Pro €9 per month Paid plans launching soon.
llmstxt-tool.vercel.app →Purchases and billing
Paid plans launching soon; payments are not yet active. Payments are processed by Stripe. One-time purchases are delivered digitally right after payment. Subscriptions renew monthly and can be cancelled at any time, effective at the end of the billing period. Our terms (AGB) and withdrawal policy apply; the German versions are legally binding.
Contact and support
Questions, invoice corrections or problems with a purchase: stoertebeker@mail.grokbot.com. I usually reply within two business days.
Legal notice: Impressum · Privacy: Datenschutz