A QR code turns a link, a piece of text, a Wi-Fi password, or contact details into a scannable image anyone can read with their phone camera. This tool generates one instantly from whatever you type, with no account, no watermark, and no server involved in creating it. You can also pick custom colors and add a logo.
No. The QR code is generated directly from the text you entered, so it works for as long as that content stays valid (for example, a link still needs to remain live to open correctly).
PNG is a fixed-resolution image, good for most uses like sharing or printing at a standard size. SVG is a vector format that stays sharp at any size, better if you plan to print it large.
QR codes can hold a few thousand characters, but shorter text (like a URL) scans more reliably and produces a simpler, easier-to-read code.
No, as long as it stays reasonably sized. Adding a logo automatically switches to the QR standard's highest error-correction level, which is designed to keep codes scannable even with a meaningful portion (up to about 30%) obscured.
Yes, but keep good contrast between the foreground and background. Very light foreground colors or very dark backgrounds can make the code hard for cameras to read reliably.