QR Code Generator

No. Every code here is static, meaning the data is encoded directly into the pattern. There is no redirect and no hosted link to expire, so the code works for as long as whatever it points to does.

Yes. Use them on products, menus, flyers, packaging and any commercial material at no cost and with no attribution required. QR Code is a registered trademark of DENSO WAVE, but the symbology itself is an open ISO standard that anyone may implement.

Choose Wi-Fi, type your network name and password, and pick the encryption your router uses — WPA/WPA2 for almost every modern network. The code encodes a string of the form WIFI:T:WPA;S:yournetwork;P:yourpassword;; and phones recognise it as a join request. If your network is hidden, turn on the hidden switch so the phone knows to search for it rather than expecting it in the list.

Because it is made only of hexadecimal characters, such as ABCD or 1234ABCD. The Wi-Fi QR format allows an SSID to be given as raw hex, so a name that looks like hex is ambiguous — a reader may decode ABCD as two bytes instead of four letters and then fail to find your network. Quoting removes the ambiguity, and we add the quotes for you.

Yes, and you can set its width. What matters is not the logo but the plate: the renderer paints the logo plus a one-module bleed ring so the image does not sit flush against live modules, and it is that plate which covers the code. We decoded symbols across ten payload lengths at every error-correction level with a logo in place. Low failed at every logo size we offer, Medium failed for short payloads, Quartile held to a 25% plate and High held throughout — so with a logo present only Quartile and High are offered.

Because it is not one. DENSO WAVE define the recovery rate as a share of total codewords, and Reed-Solomon correction is applied per interleaved block. A logo is a single contiguous blot, so its damage concentrates in a few blocks and can exhaust one block's budget while the overall percentage still looks small. That is why a 7% logo can defeat Low's 7% recovery, and why safe logo size is not a simple function of payload length.

Medium for anything on a screen or clean paper. High when you add a logo, or when the code will be printed on something that gets handled, folded or wet — badges, packaging, outdoor signage. Higher correction spends capacity on recovery data, so the same content needs a larger symbol: at version 40 the byte capacity falls from 2,953 at Low to 1,273 at High.

In order of how often it happens: the quiet zone has been cropped away, the contrast is too low or inverted, the printed modules are too small, or a logo covers more than the error correction can absorb. This page checks contrast, inversion and logo coverage as you design, and shows the plate width so nothing is hidden — but printing at a sensible size and leaving the four-module margin intact is on you.

Scan distance drives it. A common working rule is that the symbol should be about one tenth of the intended scanning distance, and that one module should not fall below roughly 0.4 mm in print. A denser symbol means smaller modules at the same overall size, so shortening the URL is often more effective than enlarging the code.

A static code stores the data itself: it cannot be edited after printing, but it never expires and nobody sits between the scanner and the destination. A dynamic code stores a short redirect URL owned by a vendor, which can be re-pointed later and can count scans — at the cost of a subscription, and of the code dying if that vendor does. Everything generated here is static.

It is never sent anywhere by this page — the code is built entirely in your browser. But the code itself contains the password in plain text, exactly as the Wi-Fi QR format requires, so anyone who scans or photographs it can read it. Treat a printed Wi-Fi code like a written-down password: fine on a guest network, not for the one your files live on.

PNG for websites, apps, slides and social media, where a fixed pixel size is what you need. SVG for anything printed — it is vector, so it stays perfectly sharp whether it ends up on a business card or a billboard, and a printer can scale it without you regenerating anything.

vCard 3.0 requires a display name: RFC 2426 states that the VERSION, N and FN properties must be specified. A card without FN can import as a nameless contact or be rejected outright, so this page asks for a name — or an organization, which is used as the display name for a company card.

At the largest symbol, version 40, the limits are 2,953 bytes at Low, 2,331 at Medium, 1,663 at Quartile and 1,273 at High. In practice you want to be far below that: a 2,000-character payload produces a dense 149-module symbol that needs a big, clean print to read. Keep URLs short and put long content behind a link rather than inside the code.