DIGITAL UTILITY KIT
Free Online Utility Tools
Small, focused utilities for tasks that should take seconds rather than require a dedicated app or account.
Available tools
4 free tools in this category.
Random Number Generator
Generate one or many random integers in any range.
Open tool →utilityQR Code Generator
Generate downloadable QR codes from text or URLs.
Open tool →utilityQR Code Reader
Read what a QR code image contains before opening it.
Open tool →utilityPercentage Calculator
Calculate percentages and percentage change instantly.
Open tool →Guides and explanations
Useful background for getting better results from these tools.
QR Codes Explained: What to Encode and How to Print Them
What to put in a code, how small it can safely go, why error correction saves a print run, and the mistakes that only show up after ten thousand copies.
Read guide →Percentage Calculations Explained With Simple Examples
The three calculations people actually need, the two that reliably go wrong, and why a rise and a fall of the same percentage never cancel out.
Read guide →Do QR Codes Expire?
Static codes last as long as the thing they point to. Dynamic ones last as long as somebody keeps paying. Know which you have before you print anything.
Read guide →How to Check Where a QR Code Leads
A printed square gives no clue where it points. How to read one from a photo before anything opens it, and what the sticker scams actually look like.
Read guide →Fast, free and privacy-focused
Digital Utility Kit is built around small tools that do one job well. Where browser technology allows it, processing happens locally on your device. No account is required to use these tools.