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QR Code Tools

Four free tools that cover the whole life of a QR code: create it, check its colours, work out the print size, and check how much data it holds. Everything runs in your browser; nothing you enter is uploaded.

QR Code Generator illustration

QR Code Generator

Create QR codes for links, text, Wi-Fi, contacts, email, phone and SMS. Download PNG or SVG.

QR Contrast Checker illustration

QR Contrast Checker

Check whether your QR colours have enough contrast to scan, with a live preview.

QR Size Calculator illustration

QR Size Calculator

Work out the minimum print size for a QR code from the scanning distance and data length.

QR Capacity Checker illustration

QR Capacity Checker

Paste a URL or text to see the QR version, grid size and error-correction options it needs.

How the four tools fit together

  1. 1
    Check what you are encoding

    The capacity checker shows the grid your content needs. Shorter content means a simpler, more reliable code.

  2. 2
    Create the code

    The generator builds links, Wi-Fi, contact cards and more, and downloads PNG or SVG.

  3. 3
    Check colours

    The contrast checker catches low-contrast and inverted designs before you print.

  4. 4
    Size it for print

    The size calculator turns the scanning distance into a minimum width and an export resolution.

How we make sure they are correct

Codes are produced by an open-source encoder (MIT licence) that we host ourselves. In automated tests we decode every kind of code the generator can make (links, long URLs, accented and non-Latin text, Wi-Fi payloads with special characters, contact cards, email, SMS) with an independent decoder and confirm the text matches. Capacity figures on this site come from encoding real test strings at every version and level, and match the published values in ISO/IEC 18004.