What this site is
QRotto is a small set of free QR code generators and the guides that explain how to use them. It started from a practical problem: wanting a WiFi QR code for a guest room without creating an account or handing a network password to a service we did not control. The other generators followed as people asked for variations.
Everything here is a static generator, which means the data you enter is encoded in the image itself and never reaches a server. That design decision is explained in more detail on the About page, including what it costs in features.
How these guides are produced
Being direct about this, because Google's own guidance asks publishers to disclose it where it helps the reader, and because you deserve to know what you are reading.
- The guides are written with AI assistance and then reviewed before publishing. They are not generated and posted unread.
- Technical claims come from the QR code specification and established scanning practice, not from repeating what other sites say. Where a guide gives a number, such as the minimum print size or the character count where codes become unreliable, that is where it comes from.
- Where a claim can be tested, we test it and publish the result. The density comparison and the inverted code test in the print sizing guide are our own measurements, generated and decoded rather than repeated from elsewhere. The inverted code test is a good example: it failed to decode, which is why the guide advises against inverted codes.
- We have not run large scale physical print trials. Our testing is software decoding and browser rendering, which is more forgiving than a phone camera in poor light. That is why every guide tells you to test one printed copy at the real size before committing to a run.
- The generators themselves are verified by decoding the codes they produce and checking the output matches the input exactly, character for character.
Where something varies by device or is genuinely uncertain, the guides say so rather than inventing a confident answer.
What we will not do
- Cite research we have not read. If a guide makes a claim, it is either verifiable from the specification, or presented as reasoning rather than evidence.
- Invent statistics. No made up percentages, no "studies show" without a study.
- Recommend something because it pays. There are no affiliate links on this site.
- Add decorative features that hurt reliability. Logos and coloured codes reduce scan success, so the generators do not offer them.
Corrections
Guidance about phones, routers and platform policies goes out of date. Operating systems change how cameras behave, router interfaces get redesigned, and Google updates its rules. If something here is wrong or has aged badly, tell us through the contact page and it gets fixed rather than defended.
When a guide is corrected, the change is made to the page itself rather than quietly dropped.
Source code
The site is maintained by one person, and its source code is public at github.com/AbuBakarUsman16/qr-code-tools, so you can see exactly what the generators do with what you type. That is the most direct answer to "should I trust this with my WiFi password": read the code.
Guides
All the guides are listed on the blog index, organised by situation, whether you are setting up a rental, a café, a hotel, or sending something to print.