Common
formatsvg, png, jpg, gif, webp, avif (when available)dpr1, 2 or 3quality40–100 for raster outputseedHuman-readable deterministic identitydownload1 to request an attachmentClassic
textCustom label; use an encoded line break for multiline textbg / colorBackground and text coloursfontsystem, humanist, serif, mono, rounded, poppins, space, developer, pixel, retrofontSize0 for automatic or an explicit pixel sizeweight400, 500, 600, 700, 800align / valignHorizontal and vertical placementpadding, radius, borderBounded layout controlstransparent1 for a transparent canvasPoppins, Space Grotesk, JetBrains Mono (developer), Press Start 2P (pixel) and the original Perfect DOS VGA 437 face from the former Jansma VIP generator (retro) are hosted locally and embedded in SVG output. They do not call Google Fonts at request time.
Procedural
Gradients accept colors, type, angle, softness and grain. Patterns accept bg, color, scale, spacing, density, rotation and opacity. Abstract output accepts two to five colours plus bounded intensity, contrast, softness, blur, grain and complexity.
Photo transforms
Use fit, position, focal coordinates, blur, vignette, grayscale, saturation, brightness, contrast, overlay, duotone, border and radius. Harmonization modes hero, background and card apply consistent bundled settings. Use set=v2 for seeded selection from the expanded 132-image catalogue; exact asset-ID URLs do not need a set.
Avatar layers and colours
style=layered-plus enables the expanded illustrated renderer. Choose face, skin, hair, clothing, eyes, brows, nose, mouth, facialHair, accessory and backgroundStyle. Colour controls include primary, secondary, bg, color, skinColor, hairColor, clothingColor, eyeColor, mouthColor, accent and borderColor. Use bg=transparent with SVG, PNG, WebP or AVIF. Omitting a layer or layer colour keeps deterministic seeded selection.