QR Code Generator with Canvas (Vanilla JavaScript, No Library)

A QR code generator that runs the full Reed-Solomon error-correction algorithm and module placement in plain JavaScript, rendered live to a canvas as you type - no external library and no server round-trip. Type any text or URL and get an instantly downloadable PNG. Supports byte-mode QR versions 1-6 (up to about 100 characters) at error-correction level M, verified against a reference decoder for correctness.

Category

img binocular Views: 8
Creation date 2026
Author snippetdeveloperr

Associated Tags

qr code generator qr code javascript canvas qr code vanilla javascript no javascript library reed-solomon url to qr code free qr code generator client side qr code ui component

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