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QR code generator

Codes

Make a QR code from a URL or text, as PNG or SVG, in your colours, with your logo in the centre if you like.

What it does

  • PNG or SVG, up to 2048 pixels
  • Your colours, or a transparent background
  • Your logo in the centre
  • Four error correction levels

Good for

  • Menus and posters
  • Tickets and labels
  • Wi-Fi details

Codes are drawn on whole pixels, so they stay sharp and scan reliably. Adding a logo raises error correction automatically to keep them readable.

Example

GETPOST https://bloodweb.net/api/v1/qr-generate

curl -H "Authorization: Bearer YOUR_KEY" "https://bloodweb.net/api/v1/qr-generate?data=https://example.com&size=300" -o qr.png

Options

NameDescription
logo
file		 Optional, POST only: an image to place in the centre, up to 5MB. Error correction is raised to H so the code still scans.
data
required 		What the code holds: a URL, text, a vCard, a Wi-Fi string.
format Image format.
One of: png, svg
Default: png
size Width and height in pixels, including the margin.
Default: 512
margin Quiet zone around the code, in modules. Scanners want 4; less works on plain backgrounds.
Default: 4
ecc Error correction: L 7%, M 15%, Q 25%, H 30%. Higher survives damage or a logo, but makes a denser code.
One of: L, M, Q, H
Default: M
color Module colour.
Default: #000000
background Background colour, or "transparent".
Default: #ffffff
logo_size Logo width as a percentage of the code. Bigger logos are harder to scan.
Default: 22

Returns

image/png or image/svg+xml.

Limits

data up to 2,000 characters.