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QR Code Generator
QR codes for links, Wi-Fi and contacts, as PNG or SVG, with a transparent option.
Free tools that run in your browser. Nothing you type, open or create is uploaded to NerdBible or anyone else.
Loading the QR encoder...
QR codes are made in your browser with qrcode-generator by Kazuhiko Arase (MIT licence). They never expire and do not pass through any tracking link. QR Code is a registered trademark of DENSO WAVE.
How to use it
- Choose what the code should hold: a link or text, a Wi-Fi login, a contact card, an email or a text message.
- Fill in the fields. The preview updates as you type; scan it with your phone camera to check it.
- Pick the size and colours, or tick Transparent background to place the code on your own design, then download a PNG for screens or an SVG for print.
Questions
Do these QR codes expire?
No. The information is stored in the code itself, not behind a short link on someone else's server, so it keeps working for as long as the printed code exists.
Which error correction level should I choose?
Medium suits most uses. Choose High if the code will be printed small, may get scuffed, or will have a logo placed over its centre. Higher levels make the pattern denser.
Why will my coloured code not scan?
Scanners need a dark code on a light background with strong contrast. Light codes on dark backgrounds and pale colours often fail. The tool warns you when the contrast is too low.
How does the Wi-Fi QR code work?
It writes the network in the standard WIFI: format that phone cameras understand: the security type, the network name, the password and whether the network is hidden. Characters with a special meaning in that format (backslash, semicolon, comma, colon and double quote) are escaped automatically, so passwords containing them still work.
When should I use a transparent background?
When the code goes on top of your own artwork, such as a poster, label or slide. The PNG and SVG then have no background at all. Only place it on a plain, light area: scanners still need strong contrast and a quiet margin around the code.
Is the Wi-Fi password sent anywhere?
No. The code is drawn by your browser on your device. Remember that anyone who scans the printed code can join the network.
About this tool
About the QR code generator
A QR code stores a short piece of information, such as a web address, that a phone camera can read in a second. This generator makes static codes: the information is written into the pattern itself, not hidden behind a short link on someone else's server.
What a code can hold
- Link or text: a website, a menu, a document or any message.
- Wi-Fi: guests scan to join your network without typing the password.
- Contact: a vCard that saves your name, phone and email straight to their contacts.
- Email and SMS: opens a message with the address and text filled in.
Wi-Fi codes and transparent backgrounds
Wi-Fi codes use the standard WIFI: format that phone cameras understand, with WPA, WEP or open security and a hidden network option. Characters that have a special meaning in that format, such as a semicolon or a colon in a password, are escaped for you. Tick Transparent background to download a PNG or SVG with no background at all, ready to place on a poster or label; keep it on a plain, light area so it still scans.
Why static codes matter
Many free generators produce dynamic codes that redirect through their own servers and stop working when a trial ends or the company changes its terms. Codes made here never expire and pass through no tracking, so a printed code keeps working as long as the paper lasts.
Printing tips
Use a dark code on a light background with strong contrast; light codes on dark backgrounds often fail, and the tool warns when contrast is too low. Choose High error correction for small prints or a logo over the centre. Download SVG for print so the code stays sharp at any size, and always scan the final print with a phone.
Codes are drawn in your browser, so Wi-Fi passwords and contact details are not sent anywhere.
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