About NuraTools
This is an independent project of free tools for everyday tasks: making QR codes, passport photos and PDFs from photos, compressing and converting images, and — for Brazil — Pix signs and charges, boleto checks and card fee maths. No sign-up, and nothing you type is sent to a server.
Editorial criteria and sources
NuraTools is an independent project. On pages about Pix, boletos, card fees and payment security, we prioritise primary sources such as the Central Bank of Brazil, federal legislation and FEBRABAN. When a rule or security recommendation can change, the relevant tool page links to the source so you can verify it directly.
The tools help generate, calculate or inspect data, but they do not replace confirmation from your bank, the terms of your provider, an issuing authority or professional advice. For a payment, always treat the recipient and amount shown by your bank before confirmation as authoritative.
How the tools work
Every tool runs in your browser. The QR code, the Pix copy-and-paste code and converted images are produced on your own device, in JavaScript. Your Pix key, your Wi-Fi password and your photos never go through a server of ours — there is no server receiving them.
You can check: after opening a tool, go offline. It keeps working.
How the site stays free
Some pages recommend products and services from partners — for example, card machines for people who get paid by Pix. When you sign up through one of those links, we may earn a commission at no extra cost to you. Those links are always labelled as partner links.
We only recommend what relates to the task at hand. The tool works the same with or without the link, and no recommendation changes what it produces.
Corrections and suggestions
Found a code your bank rejected, a typo, or a tool you miss? Your message helps decide what comes next.
Transparency
For more detail, read the privacy policy and the terms of use.