🛸 QRCodes (Segno Simple Logo)

The best of both halves of the pack

ComfyUI-Simple_QR_Codes ships two QR engines. The qrcode family is easy but generates small and resizes up, which softens the modules; the segno family renders at true native resolution, so big codes stay crisp. QRCodes (Segno Simple Logo) is where the pack combines its two selling points: segno's sharp rendering and a logo pasted dead-center. If you want a branded, scannable QR at poster size without the upscale blur, this is the node for it.

How it works

Same shape as the other segno nodes - segno.make(text, version, error) rendered via to_pil at your scale - but with the full region-color control set exposed (data, finder, alignment, timing, format, version, separator, dark module, quiet zone, all as CSS color names; dark/light master defaults are "None", letting segno pick). Then your optional image is resized to width_height_logo pixels and pasted centered on top.

The default width_height_logo here is 256 - four times the 64 that the qrcode-family logo node uses, so the logo starts out aggressively large. Keep in mind that whatever sits in the middle overwrites data modules, and segno's error-correction default is H (30% recovery) - genuinely the right default, and worth keeping when a logo is in play. The qrcode-family logo node, by contrast, defaults to the weakest correction level; this node does not have that trap.

Two quirks to know. First, if you leave image unwired it still needs something to paste, so it builds a placeholder from the light color - but light defaults to "None", which fails the color parse and lands on gray. So a missing image gives you a gray square, not a transparent one; wire in real art or set light to a real color. Second, mask_color (red/green/blue enum) selects which channel feeds the MASK/INVERTED_MASK outputs, same as the rest of the segno family.

Outputs

IMAGE, MASK (the QR pattern), INVERTED_MASK (the background) - the masks being useful if you want to composite the logo'd code over another graphic, or mask it during a ControlNet pass.

Where it bites

• DataOverflowError on the defaults - version defaults to 1 and segno raises if the text doesn't fit. Any URL needs a higher version (2–5 is typical).
• Unwired image → gray square - see above. Feed it a real logo.
• Too-big logo kills scanability - 256px default is a lot on a 512px canvas; keep the logo under ~15–20% of the code's width, keep error correction at H, and verify with the pack's QRCodeReader node before you print.

Installing it

Part of ComfyUI-Simple_QR_Codes: ComfyUI Manager → search "Simple QR Codes" → install → restart, or:

cd ComfyUI/custom_nodes
git clone https://github.com/zentrocdot/ComfyUI-Simple_QR_Codes
cd ComfyUI-Simple_QR_Codes
pip install -r requirements.txt

Requires segno and segno-pil plus the pack's shared pins (qrcode 8.0, pillow 10.4.0, opencv-python). No model downloads. You'll find it under QR Code Nodes → segno-based after restart.