Here is a support message I have answered more than once: "I replaced the share image on the pricing page last week. Slack shows the new one. LinkedIn shows the new one after I asked it to re-read the page. But some other card still has the old picture, and so does the CDN when I open the image directly from another network."
The page was fine. The tags were fine. The problem was the fi...
Every API call on my downloader costs me something. I am on the free tier of a few RapidAPI services, and each of those services gives me a fixed number of calls a month. The visitor does not see any of that. They paste a link, tap Download, and expect a video. So one of the first things I learned building ramrom.io was this: never spend an API call on a link you already know is useless.
<...We all know LLMs are brilliant at coding and writing. But if you ask an LLM to guide a foreigner through the physical world (e.g., navigating a Chinese airport, using an Alipay QR code, or surviving a Chinese ER), it generates "perfectly formatted garbage."
Why? Because LLMs optimize for fluency, not physical feasibility.
Recently, we built GoChinaTrip / SSAP. I fed the AI a rea...
How to Add a SEPA Payment QR Code to PDF Invoices with .NET Core
A small change to an invoice can make paying it much easier.
With an EPC QR code on a PDF invoice, a customer can scan the code with a compatible banking app and have the payment details filled in for them. They still review and authorize the transfer in their bank app, but they don’t need to type the IBAN, amount, or ...
If you sell to businesses in the EU, sooner or later you have to check a customer's VAT number: at checkout, before you zero-rate an invoice, or when you clean up a customer list. This post is the reference we wanted while building a VAT check: the format of every country's number, a regex for each, and what a live check against the EU's VIES service actually tells you.
Disclosure up fr...