Articles
How to create a QR code for a link and test it before printing
Prepare the URL, choose the file format, preserve clear space, and test the QR code in the final layout.
Articles
Practical notes about tools, data and everyday tasks.
Articles
How to validate JSON and find the error
A direct way to check quotes, commas, brackets, and value types when JSON fails validation.
Articles
How to run a giveaway with a random number generator
Prepare the participant list, set the range, prevent duplicate winners, and keep a clear record of the draw.