How to create a UTM link (and keep your campaign data clean)
What utm_source, utm_medium and utm_campaign mean, and a naming convention that keeps reports tidy.
Related tool: UTM Builder
Guides and how-tos
Clear, practical explanations of the everyday tasks our tools help with.
How to remove duplicate rows from a CSV file
Decide what “duplicate” means for your data, then clean it in a spreadsheet, a terminal or your browser.
Related tool: CSV Duplicate Remover
How to write an invoice: what to include and what to avoid
The details every invoice needs, a simple numbering system, and payment terms that reduce chasing.
Related tool: Invoice Generator
What is JSON, and how do you format it?
The six JSON data types, the strict syntax rules behind most errors, and when to beautify or minify.
Related tool: JSON Formatter
How to create a strong password you don’t have to remember
Length and randomness beat clever tricks. Here is how strength is measured and how to manage it.
Related tool: Password Generator
How to calculate VAT: adding and removing it correctly
The two formulas you need, worked examples, and why you can’t just subtract the VAT rate.
Related tool: VAT Calculator