Turn any text, password, or link into a scannable QR code image you can download and share.
QR codes have become one of the most common ways to move information from a screen into the physical world. This QR Code Generator turns any text, URL, or short password into a scannable QR code image, generated entirely inside your browser using a self-contained QR encoding implementation, with no external service or server involved.
A QR code encodes data as a grid of black and white squares following a publicly documented international standard. Any modern smartphone camera can read one instantly. Because the entire encoding algorithm runs as plain JavaScript directly in your browser, nothing about the text you enter is ever transmitted anywhere.
The generator first determines the smallest QR "version" capable of holding your text. Your text is then formatted according to the QR byte-mode specification, and a set of error-correction codewords is calculated using Reed-Solomon error correction, which allows a scanner to correctly read the code even if part of it is damaged or obscured. The data and error-correction bits are then mapped onto the black-and-white module grid following a precise standardized pattern.
A larger pixel size doesn't change how much data the code can hold, but it does affect how easy the code is to scan from a distance or when printed. For a screen display up close, a smaller size works fine; for print materials, choose a larger export size.
QR codes are a convenient way to hand off a temporary Wi-Fi password or a one-time link without requiring manual typing. Combine this tool with our Password Generator or Secure Self-Destruct Note Generator for quick, typo-free sharing.
QR codes have a practical data capacity limit. Also remember a QR code itself provides no encryption; if the underlying text is sensitive, encrypt it first using our Encryption/Decryption tool before generating the code.
Before printing a QR code on a poster or sending it out broadly, scan it yourself first with your own phone's camera to confirm it resolves to exactly what you intended. This simple verification step catches accidental typos in the original text or link before they reach a wider audience, saving you the trouble of reprinting materials or reissuing a corrected code after the fact.
As QR codes have become more common for everything from restaurant menus to payment terminals, so has a specific scam technique of pasting a malicious QR code sticker over a legitimate one in public spaces. When scanning a QR code you encounter in the physical world rather than one you generated yourself, apply the same caution you would to an unfamiliar link before proceeding.
Keep in mind that once printed or displayed publicly, a QR code cannot be updated, so double-check the encoded text carefully beforehand, especially for materials that will be distributed widely or left in place for an extended period.
No, the entire QR encoding process runs locally in your browser using JavaScript. Nothing is transmitted anywhere.
Yes, QR codes have a finite data capacity depending on grid size. Very long text may fail to encode or produce a hard-to-scan code.
No, the amount of data is determined by the QR version chosen based on text length. A larger size just makes each module bigger and easier to scan from a distance.
No. If your content is sensitive, encrypt it first with our Encryption/Decryption tool before generating the QR code.
Yes, this is one of the most common practical uses.
Idiot Security Tools